On compare les différents systèmes d'affichage des formules mathématiques sur les inégalités entre moyennes arithmétique, géométrique, harmonique et quadratique, sur le code LaTeX suivant.
\min_{1\le k\le n} x_k \le \frac{n}{\displaystyle\sum_{k=1}^n \frac{1}{x_k}} \le \sqrt[n]{\prod_{k=1}^n x_k} \le \frac{1}{n} \sum_{k=1}^n x_k \le \sqrt{\frac{1}{n} \sum_{k=1}^n {x_k}^2} \le \max_{1\le k \le n} x_k
Ces différents systèmes peuvent aussi être comparés sans les fichiers CSS, en sélectionnant dans l'onglet « Affichage » du navigateur, pour le style de la page, « aucun style ». Les deux premiers systèmes ne changent pas, l'affichage par MathJax devient illisible, tandis que l'affichage par Zwikix reste lisible.
<img src='../images/comparaison-moyennes.png'>
<math xmlns="http://www.w3.org/1998/Math/MathML"> <mstyle displaystyle="true"> <munder> <mo form="prefix" movablelimits="true">min</mo> <mrow> <mn>1</mn> <mo>≤<!-- ≤ --></mo> <mi>k</mi> <mo>≤<!-- ≤ --></mo> <mi>n</mi> </mrow> </munder> <msub> <mi>x</mi> <mi>k</mi> </msub> <mo>≤<!-- ≤ --></mo> <mfrac> <mi>n</mi> <mstyle displaystyle="true"> <munderover> <mo>∑<!-- ∑ --></mo> <mrow> <mi>k</mi> <mo>=</mo> <mn>1</mn> </mrow> <mi>n</mi> </munderover> <mfrac> <mn>1</mn> <msub> <mi>x</mi> <mi>k</mi> </msub> </mfrac> </mstyle> </mfrac> <mo>≤<!-- ≤ --></mo> <mroot> <mrow> <munderover> <mo>∏<!-- ∏ --></mo> <mrow> <mi>k</mi> <mo>=</mo> <mn>1</mn> </mrow> <mi>n</mi> </munderover> <msub> <mi>x</mi> <mi>k</mi> </msub> </mrow> <mi>n</mi> </mroot> <mo>≤<!-- ≤ --></mo> <mfrac> <mn>1</mn> <mi>n</mi> </mfrac> <munderover> <mo>∑<!-- ∑ --></mo> <mrow> <mi>k</mi> <mo>=</mo> <mn>1</mn> </mrow> <mi>n</mi> </munderover> <msub> <mi>x</mi> <mi>k</mi> </msub> <mo>≤<!-- ≤ --></mo> <msqrt> <mfrac> <mn>1</mn> <mi>n</mi> </mfrac> <munderover> <mo>∑<!-- ∑ --></mo> <mrow> <mi>k</mi> <mo>=</mo> <mn>1</mn> </mrow> <mi>n</mi> </munderover> <msup> <mrow> <msub> <mi>x</mi> <mi>k</mi> </msub> </mrow> <mn>2</mn> </msup> </msqrt> <mo>≤<!-- ≤ --></mo> <munder> <mo form="prefix" movablelimits="true">max</mo> <mrow> <mn>1</mn> <mo>≤<!-- ≤ --></mo> <mi>k</mi> <mo>≤<!-- ≤ --></mo> <mi>n</mi> </mrow> </munder> <msub> <mi>x</mi> <mi>k</mi> </msub> </mstyle> </math>
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clip: rect(0.849em, 1000em, 1.239em, -0.485em); top: -1.298em; left: 0em;"><span style="border-left: 0.713em solid; display: inline-block; overflow: hidden; width: 0px; height: 1.25px; vertical-align: 0em;"></span><span style="display: inline-block; width: 0px; height: 1.078em;"></span></span></span></span><span style="padding-left: 0.188em;" id="MathJax-Span-71" class="munderover"><span style="display: inline-block; position: relative; width: 1.455em; height: 0px;"><span style="position: absolute; clip: rect(2.096em, 1000em, 3.869em, -0.395em); top: -3.233em; left: 0.027em;"><span style="font-family: STIXSizeOneSym; vertical-align: -0.524em;" id="MathJax-Span-72" class="mo">∑</span><span style="display: inline-block; width: 0px; height: 3.233em;"></span></span><span style="position: absolute; clip: rect(1.564em, 1000em, 2.478em, -0.475em); top: -1.059em; left: 0em;"><span id="MathJax-Span-73" class="texatom"><span id="MathJax-Span-74" class="mrow"><span style="font-size: 70.7%; font-family: STIXGeneral; font-style: italic;" id="MathJax-Span-75" class="mi">k<span style="display: inline-block; overflow: hidden; height: 1px; width: 0.012em;"></span></span><span style="font-size: 70.7%; font-family: STIXGeneral;" id="MathJax-Span-76" class="mo">=</span><span style="font-size: 70.7%; font-family: STIXGeneral;" id="MathJax-Span-77" class="mn">1</span></span></span><span style="display: inline-block; width: 0px; height: 2.209em;"></span></span><span style="position: absolute; clip: rect(1.636em, 1000em, 2.377em, -0.475em); top: -3.409em; left: 0.512em;"><span style="font-size: 70.7%; font-family: STIXGeneral; font-style: italic;" id="MathJax-Span-78" class="mi">n</span><span style="display: inline-block; width: 0px; height: 2.209em;"></span></span></span></span><span style="padding-left: 0.188em;" id="MathJax-Span-79" class="msubsup"><span style="display: inline-block; position: relative; width: 1.494em; height: 0px;"><span style="position: absolute; clip: rect(3.384em, 1000em, 4.306em, -0.512em); top: -3.987em; left: 0em;"><span id="MathJax-Span-80" class="texatom"><span id="MathJax-Span-81" class="mrow"><span id="MathJax-Span-82" class="msubsup"><span style="display: inline-block; position: relative; width: 0.988em; height: 0px;"><span style="position: absolute; clip: rect(1.822em, 1000em, 2.597em, -0.512em); top: -2.425em; left: 0em;"><span style="font-family: STIXGeneral; font-style: italic;" id="MathJax-Span-83" class="mi">x<span style="display: inline-block; overflow: hidden; height: 1px; width: 0.003em;"></span></span><span style="display: inline-block; width: 0px; height: 2.425em;"></span></span><span style="position: absolute; top: -2.059em; left: 0.536em;"><span style="font-size: 70.7%; font-family: STIXGeneral; font-style: italic;" id="MathJax-Span-84" class="mi">k<span style="display: inline-block; overflow: hidden; height: 1px; width: 0.012em;"></span></span><span style="display: inline-block; width: 0px; height: 2.209em;"></span></span></span></span></span></span><span style="display: inline-block; width: 0px; height: 3.987em;"></span></span><span style="position: absolute; top: -2.622em; left: 0.988em;"><span style="font-size: 70.7%; font-family: STIXGeneral;" id="MathJax-Span-85" class="mn">2</span><span style="display: inline-block; width: 0px; height: 2.209em;"></span></span></span></span></span><span style="display: inline-block; width: 0px; height: 3.987em;"></span></span><span style="position: absolute; clip: rect(3.005em, 1000em, 3.379em, -0.485em); top: -5.146em; left: 1.125em;"><span style="display: inline-block; position: relative; width: 4.302em; height: 0px;"><span style="position: absolute; font-family: STIXGeneral; top: -3.987em; left: 0em;">‾<span style="display: inline-block; width: 0px; height: 3.987em;"></span></span><span style="position: absolute; font-family: STIXGeneral; top: -3.987em; left: 3.802em;">‾<span style="display: inline-block; width: 0px; height: 3.987em;"></span></span><span style="font-family: STIXGeneral; position: absolute; top: -3.987em; left: 0.4em;">‾<span style="display: inline-block; width: 0px; height: 3.987em;"></span></span><span style="font-family: STIXGeneral; position: absolute; top: -3.987em; left: 0.826em;">‾<span style="display: inline-block; width: 0px; height: 3.987em;"></span></span><span style="font-family: STIXGeneral; position: absolute; top: -3.987em; left: 1.251em;">‾<span style="display: inline-block; width: 0px; height: 3.987em;"></span></span><span style="font-family: STIXGeneral; position: absolute; top: -3.987em; left: 1.676em;">‾<span style="display: inline-block; width: 0px; height: 3.987em;"></span></span><span style="font-family: STIXGeneral; position: absolute; top: -3.987em; left: 2.101em;">‾<span style="display: inline-block; width: 0px; height: 3.987em;"></span></span><span style="font-family: STIXGeneral; position: absolute; top: -3.987em; left: 2.527em;">‾<span style="display: inline-block; width: 0px; height: 3.987em;"></span></span><span style="font-family: STIXGeneral; position: absolute; top: -3.987em; left: 2.952em;">‾<span style="display: inline-block; width: 0px; height: 3.987em;"></span></span><span style="font-family: STIXGeneral; position: absolute; top: -3.987em; left: 3.377em;">‾<span style="display: inline-block; width: 0px; height: 3.987em;"></span></span></span><span style="display: inline-block; width: 0px; height: 3.987em;"></span></span><span style="position: absolute; clip: rect(4.472em, 1000em, 8.446em, -0.485em); top: -6.612em; left: 0em;"><span style="display: inline-block; position: relative; width: 1.184em; height: 0px;"><span style="position: absolute; font-family: STIXNonUnicode; top: -3.32em; left: 0em;"><span style="display: inline-block; width: 0px; height: 3.987em;"></span></span><span style="position: absolute; font-family: STIXSizeOneSym; top: -0.681em; left: 0em;">⎷<span style="display: inline-block; width: 0px; height: 3.987em;"></span></span><span style="font-family: STIXNonUnicode; position: absolute; top: -2.784em; left: 0em;"><span style="display: inline-block; width: 0px; height: 3.987em;"></span></span><span style="font-family: STIXNonUnicode; position: absolute; top: -2.183em; left: 0em;"><span style="display: inline-block; width: 0px; height: 3.987em;"></span></span></span><span style="display: inline-block; width: 0px; height: 4.634em;"></span></span></span></span><span style="font-family: STIXGeneral; padding-left: 0.313em;" id="MathJax-Span-86" class="mo">≤</span><span style="padding-left: 0.313em;" id="MathJax-Span-87" class="munderover"><span style="display: inline-block; position: relative; width: 2.532em; height: 0px;"><span style="position: absolute; clip: rect(1.749em, 1000em, 2.542em, -0.469em); top: -2.371em; left: 0.269em;"><span style="font-family: STIXGeneral;" id="MathJax-Span-88" class="mo">max</span><span style="display: inline-block; width: 0px; height: 2.371em;"></span></span><span style="position: absolute; clip: rect(1.564em, 1000em, 2.544em, -0.406em); top: -1.524em; left: 0em;"><span id="MathJax-Span-89" class="texatom"><span id="MathJax-Span-90" class="mrow"><span style="font-size: 70.7%; font-family: STIXGeneral;" id="MathJax-Span-91" class="mn">1</span><span style="font-size: 70.7%; font-family: STIXGeneral;" id="MathJax-Span-92" class="mo">≤</span><span style="font-size: 70.7%; font-family: STIXGeneral; font-style: italic;" id="MathJax-Span-93" class="mi">k<span style="display: inline-block; overflow: hidden; height: 1px; width: 0.012em;"></span></span><span style="font-size: 70.7%; font-family: STIXGeneral;" id="MathJax-Span-94" class="mo">≤</span><span style="font-size: 70.7%; font-family: STIXGeneral; font-style: italic;" id="MathJax-Span-95" class="mi">n</span></span></span><span style="display: inline-block; width: 0px; height: 2.209em;"></span></span></span></span><span style="padding-left: 0.188em;" id="MathJax-Span-96" class="msubsup"><span style="display: inline-block; position: relative; width: 0.988em; height: 0px;"><span style="position: absolute; clip: rect(1.822em, 1000em, 2.597em, -0.512em); top: -2.425em; left: 0em;"><span style="font-family: STIXGeneral; font-style: italic;" id="MathJax-Span-97" class="mi">x<span style="display: inline-block; overflow: hidden; height: 1px; width: 0.003em;"></span></span><span style="display: inline-block; width: 0px; height: 2.425em;"></span></span><span style="position: absolute; top: -2.059em; left: 0.536em;"><span style="font-size: 70.7%; font-family: STIXGeneral; font-style: italic;" id="MathJax-Span-98" class="mi">k<span style="display: inline-block; overflow: hidden; height: 1px; width: 0.012em;"></span></span><span style="display: inline-block; width: 0px; height: 2.209em;"></span></span></span></span></span></span></span><span style="display: inline-block; width: 0px; height: 2.371em;"></span></span></span><span style="border-left: 0em solid; display: inline-block; overflow: hidden; width: 0px; height: 5.72em; vertical-align: -3.362em;"></span></span>
<span class="katex"><span class="katex-inner"><span class="strut" style="height:2.4185270000000005em;"></span><span class="strut bottom" style="height:5.262037000000001em;vertical-align:-2.84351em;"></span><span class="base textstyle uncramped"><span class="reset-textstyle displaystyle textstyle uncramped"><span class="mop op-limits"><span class="vlist"><span style="top:0.6521079999999999em;margin-left:0em;"><span class="fontsize-ensurer reset-size5 size5"><span style="font-size:0em;"></span></span><span class="reset-textstyle scriptstyle cramped"><span class="mord scriptstyle cramped"><span class="mord">1</span><span class="mrel">≤</span><span class="mord mathit" style="margin-right:0.03148em;">k</span><span class="mrel">≤</span><span class="mord mathit">n</span></span></span></span><span style="top:2.7755575615628914e-17em;"><span class="fontsize-ensurer reset-size5 size5"><span style="font-size:0em;"></span></span><span><span class="mop">min</span></span></span><span class="baseline-fix"><span class="fontsize-ensurer reset-size5 size5"><span style="font-size:0em;"></span></span></span></span></span><span class="mord"><span class="mord mathit">x</span><span class="vlist"><span style="top:0.15em;margin-right:0.05em;margin-left:0em;"><span class="fontsize-ensurer reset-size5 size5"><span style="font-size:0em;"></span></span><span class="reset-textstyle scriptstyle cramped"><span class="mord mathit" style="margin-right:0.03148em;">k</span></span></span><span class="baseline-fix"><span class="fontsize-ensurer reset-size5 size5"><span style="font-size:0em;"></span></span></span></span></span><span class="mrel">≤</span><span class="minner mfrac reset-textstyle displaystyle textstyle uncramped"><span class="vlist"><span style="top:1.5413970000000001em;"><span class="fontsize-ensurer reset-size5 size5"><span style="font-size:0em;"></span></span><span class="reset-textstyle textstyle cramped"><span class="mord textstyle cramped"><span class="reset-textstyle displaystyle textstyle uncramped"><span class="mop op-limits"><span class="vlist"><span style="top:1.202113em;margin-left:0em;"><span class="fontsize-ensurer reset-size5 size5"><span style="font-size:0em;"></span></span><span class="reset-textstyle scriptstyle cramped"><span class="mord scriptstyle cramped"><span class="mord mathit" style="margin-right:0.03148em;">k</span><span class="mrel">=</span><span class="mord">1</span></span></span></span><span style="top:-0.000005000000000032756em;"><span class="fontsize-ensurer reset-size5 size5"><span style="font-size:0em;"></span></span><span><span class="op-symbol large-op mop">∑</span></span></span><span style="top:-1.250005em;margin-left:0em;"><span class="fontsize-ensurer reset-size5 size5"><span style="font-size:0em;"></span></span><span class="reset-textstyle scriptstyle uncramped"><span class="mord mathit">n</span></span></span><span class="baseline-fix"><span class="fontsize-ensurer reset-size5 size5"><span style="font-size:0em;"></span></span></span></span></span><span class="minner mfrac reset-textstyle displaystyle textstyle uncramped"><span class="vlist"><span style="top:0.686em;"><span class="fontsize-ensurer reset-size5 size5"><span style="font-size:0em;"></span></span><span class="reset-textstyle textstyle cramped"><span class="mord textstyle cramped"><span class="mord"><span class="mord mathit">x</span><span class="vlist"><span style="top:0.15em;margin-right:0.05em;margin-left:0em;"><span class="fontsize-ensurer reset-size5 size5"><span style="font-size:0em;"></span></span><span class="reset-textstyle scriptstyle cramped"><span class="mord mathit" style="margin-right:0.03148em;">k</span></span></span><span class="baseline-fix"><span class="fontsize-ensurer reset-size5 size5"><span style="font-size:0em;"></span></span></span></span></span></span></span></span><span style="top:-0.22999999999999998em;"><span class="fontsize-ensurer reset-size5 size5"><span style="font-size:0em;"></span></span><span class="reset-textstyle textstyle uncramped frac-line"></span></span><span style="top:-0.677em;"><span class="fontsize-ensurer reset-size5 size5"><span style="font-size:0em;"></span></span><span class="reset-textstyle textstyle uncramped"><span class="mord textstyle uncramped"><span class="mord">1</span></span></span></span><span class="baseline-fix"><span class="fontsize-ensurer reset-size5 size5"><span style="font-size:0em;"></span></span></span></span></span></span></span></span></span><span style="top:-0.22999999999999998em;"><span class="fontsize-ensurer reset-size5 size5"><span style="font-size:0em;"></span></span><span class="reset-textstyle textstyle uncramped frac-line"></span></span><span style="top:-0.677em;"><span class="fontsize-ensurer reset-size5 size5"><span style="font-size:0em;"></span></span><span class="reset-textstyle textstyle uncramped"><span class="mord textstyle uncramped"><span class="mord mathit">n</span></span></span></span><span class="baseline-fix"><span class="fontsize-ensurer reset-size5 size5"><span style="font-size:0em;"></span></span></span></span></span><span class="mrel">≤</span><span class="sqrt mord"><span class="sqrt-sign" style="top:-0.09388000000000007em;"><span class="style-wrap reset-textstyle textstyle uncramped"><span class="delimsizing size1">√</span></span></span><span class="vlist"><span style="top:0em;"><span class="fontsize-ensurer reset-size5 size5"><span style="font-size:1em;"></span></span><span class="mopen">[</span></span><span style="top:-0.90388em;"><span class="fontsize-ensurer reset-size5 size5"><span style="font-size:1em;"></span></span><span class="reset-textstyle textstyle uncramped sqrt-line"></span></span><span class="baseline-fix"><span class="fontsize-ensurer reset-size5 size5"><span style="font-size:1em;"></span></span></span></span></span><span class="mord mathit">n</span><span class="mclose">]</span><span class="mord displaystyle textstyle uncramped"><span class="mop op-limits"><span class="vlist"><span style="top:1.202113em;margin-left:0em;"><span class="fontsize-ensurer reset-size5 size5"><span style="font-size:0em;"></span></span><span class="reset-textstyle scriptstyle cramped"><span class="mord scriptstyle cramped"><span class="mord mathit" style="margin-right:0.03148em;">k</span><span class="mrel">=</span><span class="mord">1</span></span></span></span><span style="top:-0.000005000000000032756em;"><span class="fontsize-ensurer reset-size5 size5"><span style="font-size:0em;"></span></span><span><span class="op-symbol large-op mop">∏</span></span></span><span style="top:-1.250005em;margin-left:0em;"><span class="fontsize-ensurer reset-size5 size5"><span style="font-size:0em;"></span></span><span class="reset-textstyle scriptstyle uncramped"><span class="mord mathit">n</span></span></span><span class="baseline-fix"><span class="fontsize-ensurer reset-size5 size5"><span style="font-size:0em;"></span></span></span></span></span><span class="mord"><span class="mord mathit">x</span><span class="vlist"><span style="top:0.15em;margin-right:0.05em;margin-left:0em;"><span class="fontsize-ensurer reset-size5 size5"><span style="font-size:0em;"></span></span><span class="reset-textstyle scriptstyle cramped"><span class="mord mathit" style="margin-right:0.03148em;">k</span></span></span><span class="baseline-fix"><span class="fontsize-ensurer reset-size5 size5"><span style="font-size:0em;"></span></span></span></span></span></span><span class="mrel">≤</span><span class="minner mfrac reset-textstyle displaystyle textstyle uncramped"><span class="vlist"><span style="top:0.686em;"><span class="fontsize-ensurer reset-size5 size5"><span style="font-size:0em;"></span></span><span class="reset-textstyle textstyle cramped"><span class="mord textstyle cramped"><span class="mord mathit">n</span></span></span></span><span style="top:-0.22999999999999998em;"><span class="fontsize-ensurer reset-size5 size5"><span style="font-size:0em;"></span></span><span class="reset-textstyle textstyle uncramped frac-line"></span></span><span style="top:-0.677em;"><span class="fontsize-ensurer reset-size5 size5"><span style="font-size:0em;"></span></span><span class="reset-textstyle textstyle uncramped"><span class="mord textstyle uncramped"><span class="mord">1</span></span></span></span><span class="baseline-fix"><span class="fontsize-ensurer reset-size5 size5"><span style="font-size:0em;"></span></span></span></span></span><span class="mop op-limits"><span class="vlist"><span style="top:1.202113em;margin-left:0em;"><span class="fontsize-ensurer reset-size5 size5"><span style="font-size:0em;"></span></span><span class="reset-textstyle scriptstyle cramped"><span class="mord scriptstyle cramped"><span class="mord mathit" style="margin-right:0.03148em;">k</span><span class="mrel">=</span><span class="mord">1</span></span></span></span><span style="top:-0.000005000000000032756em;"><span class="fontsize-ensurer reset-size5 size5"><span style="font-size:0em;"></span></span><span><span class="op-symbol large-op mop">∑</span></span></span><span style="top:-1.250005em;margin-left:0em;"><span class="fontsize-ensurer reset-size5 size5"><span style="font-size:0em;"></span></span><span class="reset-textstyle scriptstyle uncramped"><span class="mord mathit">n</span></span></span><span class="baseline-fix"><span class="fontsize-ensurer reset-size5 size5"><span style="font-size:0em;"></span></span></span></span></span><span class="mord"><span class="mord mathit">x</span><span class="vlist"><span style="top:0.15em;margin-right:0.05em;margin-left:0em;"><span class="fontsize-ensurer reset-size5 size5"><span style="font-size:0em;"></span></span><span class="reset-textstyle scriptstyle cramped"><span class="mord mathit" style="margin-right:0.03148em;">k</span></span></span><span class="baseline-fix"><span class="fontsize-ensurer reset-size5 size5"><span style="font-size:0em;"></span></span></span></span></span><span class="mrel">≤</span><span class="sqrt mord"><span class="sqrt-sign" style="top:0.2914679999999996em;"><span class="style-wrap reset-textstyle textstyle uncramped"><span class="delimsizing mult"><span class="vlist"><span style="top:0.6650050000000002em;"><span class="fontsize-ensurer reset-size5 size5"><span style="font-size:0em;"></span></span><span class="delimsizinginner delim-size4"><span>⎷</span></span></span><span style="top:-0.24999499999999975em;"><span class="fontsize-ensurer reset-size5 size5"><span style="font-size:0em;"></span></span><span class="delimsizinginner delim-size4"><span></span></span></span><span style="top:-0.8549949999999997em;"><span class="fontsize-ensurer reset-size5 size5"><span style="font-size:0em;"></span></span><span class="delimsizinginner delim-size4"><span></span></span></span><span style="top:-1.4599949999999997em;"><span class="fontsize-ensurer reset-size5 size5"><span style="font-size:0em;"></span></span><span class="delimsizinginner delim-size4"><span></span></span></span><span style="top:-2.0649949999999997em;"><span class="fontsize-ensurer reset-size5 size5"><span style="font-size:0em;"></span></span><span class="delimsizinginner delim-size4"><span></span></span></span><span class="baseline-fix"><span class="fontsize-ensurer reset-size5 size5"><span style="font-size:0em;"></span></span></span></span></span></span></span><span class="vlist"><span style="top:0em;"><span class="fontsize-ensurer reset-size5 size5"><span style="font-size:1em;"></span></span><span class="mord displaystyle textstyle cramped"><span class="minner mfrac reset-textstyle displaystyle textstyle cramped"><span class="vlist"><span style="top:0.686em;"><span class="fontsize-ensurer reset-size5 size5"><span style="font-size:0em;"></span></span><span class="reset-textstyle textstyle cramped"><span class="mord textstyle cramped"><span class="mord mathit">n</span></span></span></span><span style="top:-0.22999999999999998em;"><span class="fontsize-ensurer reset-size5 size5"><span style="font-size:0em;"></span></span><span class="reset-textstyle textstyle uncramped frac-line"></span></span><span style="top:-0.677em;"><span class="fontsize-ensurer reset-size5 size5"><span style="font-size:0em;"></span></span><span class="reset-textstyle textstyle cramped"><span class="mord textstyle cramped"><span class="mord">1</span></span></span></span><span class="baseline-fix"><span class="fontsize-ensurer reset-size5 size5"><span style="font-size:0em;"></span></span></span></span></span><span class="mop op-limits"><span class="vlist"><span style="top:1.202113em;margin-left:0em;"><span class="fontsize-ensurer reset-size5 size5"><span style="font-size:0em;"></span></span><span class="reset-textstyle scriptstyle cramped"><span class="mord scriptstyle cramped"><span class="mord mathit" style="margin-right:0.03148em;">k</span><span class="mrel">=</span><span class="mord">1</span></span></span></span><span style="top:-0.000005000000000032756em;"><span class="fontsize-ensurer reset-size5 size5"><span style="font-size:0em;"></span></span><span><span class="op-symbol large-op mop">∑</span></span></span><span style="top:-1.250005em;margin-left:0em;"><span class="fontsize-ensurer reset-size5 size5"><span style="font-size:0em;"></span></span><span class="reset-textstyle scriptstyle cramped"><span class="mord mathit">n</span></span></span><span class="baseline-fix"><span class="fontsize-ensurer reset-size5 size5"><span style="font-size:0em;"></span></span></span></span></span><span class="mord"><span class="mord displaystyle textstyle cramped"><span class="mord"><span class="mord mathit">x</span><span class="vlist"><span style="top:0.15em;margin-right:0.05em;margin-left:0em;"><span class="fontsize-ensurer reset-size5 size5"><span style="font-size:0em;"></span></span><span class="reset-textstyle scriptstyle cramped"><span class="mord mathit" style="margin-right:0.03148em;">k</span></span></span><span class="baseline-fix"><span class="fontsize-ensurer reset-size5 size5"><span style="font-size:0em;"></span></span></span></span></span></span><span class="vlist"><span style="top:-0.289em;margin-right:0.05em;"><span class="fontsize-ensurer reset-size5 size5"><span style="font-size:0em;"></span></span><span class="reset-textstyle scriptstyle cramped"><span class="mord">2</span></span></span><span class="baseline-fix"><span class="fontsize-ensurer reset-size5 size5"><span style="font-size:0em;"></span></span></span></span></span></span></span><span style="top:-2.3385270000000005em;"><span class="fontsize-ensurer reset-size5 size5"><span style="font-size:1em;"></span></span><span class="reset-textstyle textstyle uncramped sqrt-line"></span></span><span class="baseline-fix"><span class="fontsize-ensurer reset-size5 size5"><span style="font-size:1em;"></span></span></span></span></span><span class="mrel">≤</span><span class="mop op-limits"><span class="vlist"><span style="top:0.6521079999999999em;margin-left:0em;"><span class="fontsize-ensurer reset-size5 size5"><span style="font-size:0em;"></span></span><span class="reset-textstyle scriptstyle cramped"><span class="mord scriptstyle cramped"><span class="mord">1</span><span class="mrel">≤</span><span class="mord mathit" style="margin-right:0.03148em;">k</span><span class="mrel">≤</span><span class="mord mathit">n</span></span></span></span><span style="top:2.7755575615628914e-17em;"><span class="fontsize-ensurer reset-size5 size5"><span style="font-size:0em;"></span></span><span><span class="mop">max</span></span></span><span class="baseline-fix"><span class="fontsize-ensurer reset-size5 size5"><span style="font-size:0em;"></span></span></span></span></span><span class="mord"><span class="mord mathit">x</span><span class="vlist"><span style="top:0.15em;margin-right:0.05em;margin-left:0em;"><span class="fontsize-ensurer reset-size5 size5"><span style="font-size:0em;"></span></span><span class="reset-textstyle scriptstyle cramped"><span class="mord mathit" style="margin-right:0.03148em;">k</span></span></span><span class="baseline-fix"><span class="fontsize-ensurer reset-size5 size5"><span style="font-size:0em;"></span></span></span></span></span></span></span></span></span>
<span class='math'><span class='stack'><span class='sign'>min</span><sub>1≤<var>k</var>≤<var>n</var></sub></span> <var>x</var><sub><var>k</var></sub> ≤ <span class='power'><span class='frac'><span class='num'><var>n</var></span><span class='divbar'>/</span><span class='den'><span class='high'><span class='stack'><span class='sign'>∑</span><sub><var>k</var>=1</sub><sup><var>n</var></sup></span></span> <span class='sfrac'><span class='num'>1</span><span class='divbar'>/</span><span class='den'><var>x</var><sub><var>k</var></sub></span></span></span></span> ≤ <span class='bigg radical'><sup><var>n</var></sup><span class='sign'>√</span><span class='radicand'><span class='high'><span class='stack'><span class='sign'>∏</span><sub><var>k</var>=1</sub><sup><var>n</var></sup></span></span> <var>x</var><sub><var>k</var></sub></span></span> ≤ <span class='frac'><span class='num'>1</span><span class='divbar'>/</span><span class='den'><var>n</var></span></span> <span class='high'><span class='stack'><span class='sign'>∑</span><sub><var>k</var>=1</sub><sup><var>n</var></sup></span></span> <var>x</var><sub><var>k</var></sub></span> ≤ <span class='bigg radical'><span class='sign'>√</span><span class='radicand'><span class='hidden'>(</span><span class='sfrac'><span class='num'>1</span><span class='divbar'>/</span><span class='den'><var>n</var></span></span> <span class='high'><span class='stack'><span class='sign'>∑</span><sub><var>k</var>=1</sub><sup><var>n</var></sup></span></span> <span class='power'><var>x</var><sub><var>k</var></sub><sup>2</sup></span><span class='hidden'>)</span></span></span> ≤ <span class='stack'><span class='sign'>max</span><sub>1≤<var>k</var>≤<var>n</var></sub></span> <var>x</var><sub><var>k</var></sub></span>