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http://functions.wolfram.com/13.06.25.0005.01
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Limit[Max[EulerPhi[EulerPhi[2]]/2, EulerPhi[EulerPhi[3]]/3, \[Ellipsis],
EulerPhi[EulerPhi[n]]/n], n -> Infinity] == 1/2
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Cell[BoxData[RowBox[List[RowBox[List["Limit", "[", RowBox[List[RowBox[List["Max", "[", RowBox[List[FractionBox[RowBox[List["EulerPhi", "[", RowBox[List["EulerPhi", "[", "2", "]"]], "]"]], "2"], " ", ",", FractionBox[RowBox[List["EulerPhi", "[", RowBox[List["EulerPhi", "[", "3", "]"]], "]"]], "3"], ",", "\[Ellipsis]", ",", FractionBox[RowBox[List["EulerPhi", "[", RowBox[List["EulerPhi", "[", "n", "]"]], "]"]], "n"]]], "]"]], ",", RowBox[List["n", "\[Rule]", "\[Infinity]"]]]], "]"]], "\[Equal]", FractionBox["1", "2"]]]]]
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<math xmlns='http://www.w3.org/1998/Math/MathML' mathematica:form='TraditionalForm' xmlns:mathematica='http://www.wolfram.com/XML/'> <semantics> <mrow> <mrow> <munder> <mi> lim </mi> <mrow> <mi> n </mi> <semantics> <mo> → </mo> <annotation encoding='Mathematica'> "\[Rule]" </annotation> </semantics> <mi> ∞ </mi> </mrow> </munder> <mo> ⁢ </mo> <mtext>   </mtext> <mrow> <mi> max </mi> <mo> ⁡ </mo> <mo> ( </mo> <mrow> <mrow> <mfrac> <mn> 1 </mn> <mn> 2 </mn> </mfrac> <mo> ⁢ </mo> <mrow> <semantics> <mi> ϕ </mi> <annotation encoding='Mathematica'> TagBox["\[Phi]", EulerPhi] </annotation> </semantics> <mo> ( </mo> <mrow> <semantics> <mi> ϕ </mi> <annotation encoding='Mathematica'> TagBox["\[Phi]", EulerPhi] </annotation> </semantics> <mo> ( </mo> <mn> 2 </mn> <mo> ) </mo> </mrow> <mo> ) </mo> </mrow> </mrow> <mo> , </mo> <mrow> <mfrac> <mn> 1 </mn> <mn> 3 </mn> </mfrac> <mo> ⁢ </mo> <mrow> <semantics> <mi> ϕ </mi> <annotation encoding='Mathematica'> TagBox["\[Phi]", EulerPhi] </annotation> </semantics> <mo> ( </mo> <mrow> <semantics> <mi> ϕ </mi> <annotation encoding='Mathematica'> TagBox["\[Phi]", EulerPhi] </annotation> </semantics> <mo> ( </mo> <mn> 3 </mn> <mo> ) </mo> </mrow> <mo> ) </mo> </mrow> </mrow> <mo> , </mo> <mo> … </mo> <mo> , </mo> <mrow> <mfrac> <mn> 1 </mn> <mi> n </mi> </mfrac> <mo> ⁢ </mo> <mrow> <semantics> <mi> ϕ </mi> <annotation encoding='Mathematica'> TagBox["\[Phi]", EulerPhi] </annotation> </semantics> <mo> ( </mo> <mrow> <semantics> <mi> ϕ </mi> <annotation encoding='Mathematica'> TagBox["\[Phi]", EulerPhi] </annotation> </semantics> <mo> ( </mo> <mi> n </mi> <mo> ) </mo> </mrow> <mo> ) </mo> </mrow> </mrow> </mrow> <mo> ) </mo> </mrow> </mrow> <mo> ⩵ </mo> <mfrac> <mn> 1 </mn> <mn> 2 </mn> </mfrac> </mrow> <annotation-xml encoding='MathML-Content'> <apply> <eq /> <apply> <limit /> <bvar> <ci> n </ci> </bvar> <condition> <apply> <tendsto /> <ci> n </ci> <infinity /> </apply> </condition> <apply> <max /> <apply> <times /> <cn type='rational'> 1 <sep /> 2 </cn> <apply> <ci> EulerPhi </ci> <apply> <ci> EulerPhi </ci> <cn type='integer'> 2 </cn> </apply> </apply> </apply> <apply> <times /> <cn type='rational'> 1 <sep /> 3 </cn> <apply> <ci> EulerPhi </ci> <apply> <ci> EulerPhi </ci> <cn type='integer'> 3 </cn> </apply> </apply> </apply> <ci> … </ci> <apply> <times /> <apply> <times /> <cn type='integer'> 1 </cn> <apply> <power /> <ci> n </ci> <cn type='integer'> -1 </cn> </apply> </apply> <apply> <ci> EulerPhi </ci> <apply> <ci> EulerPhi </ci> <ci> n </ci> </apply> </apply> </apply> </apply> </apply> <cn type='rational'> 1 <sep /> 2 </cn> </apply> </annotation-xml> </semantics> </math>
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| Cell[BoxData[RowBox[List[RowBox[List["HoldPattern", "[", RowBox[List["Limit", "[", RowBox[List[RowBox[List["Max", "[", RowBox[List[RowBox[List[FractionBox["1", "2"], " ", RowBox[List["EulerPhi", "[", RowBox[List["EulerPhi", "[", "2", "]"]], "]"]]]], ",", RowBox[List[FractionBox["1", "3"], " ", RowBox[List["EulerPhi", "[", RowBox[List["EulerPhi", "[", "3", "]"]], "]"]]]], ",", "\[Ellipsis]_", ",", FractionBox[RowBox[List["EulerPhi", "[", RowBox[List["EulerPhi", "[", "n_", "]"]], "]"]], "n_"]]], "]"]], ",", RowBox[List["n_", "\[Rule]", "\[Infinity]"]]]], "]"]], "]"]], "\[RuleDelayed]", FractionBox["1", "2"]]]]] |
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Date Added to functions.wolfram.com (modification date)
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