(Subscript[z, 1]/Subscript[z, 2])^a == Subscript[z, 1]^a/Subscript[z, 2]^a /; Subscript[z, 2] - Subscript[z, 1] >= 0

Cell[BoxData[RowBox[List[RowBox[List[SuperscriptBox[RowBox[List["(", FractionBox[SubscriptBox["z", "1"], SubscriptBox["z", "2"]], ")"]], "a"], "\[Equal]", FractionBox[SubsuperscriptBox["z", "1", "a"], SubsuperscriptBox["z", "2", "a"]]]], "/;", RowBox[List[RowBox[List[SubscriptBox["z", "2"], "-", SubscriptBox["z", "1"]]], "\[GreaterEqual]", "0"]]]]]]

<math xmlns='http://www.w3.org/1998/Math/MathML' mathematica:form='TraditionalForm' xmlns:mathematica='http://www.wolfram.com/XML/'> <semantics> <mrow> <mrow> <msup> <mrow> <mo> ( </mo> <mfrac> <msub> <mi> z </mi> <mn> 1 </mn> </msub> <msub> <mi> z </mi> <mn> 2 </mn> </msub> </mfrac> <mo> ) </mo> </mrow> <mi> a </mi> </msup> <mo> &#10869; </mo> <mfrac> <msubsup> <mi> z </mi> <mn> 1 </mn> <mi> a </mi> </msubsup> <msubsup> <mi> z </mi> <mn> 2 </mn> <mi> a </mi> </msubsup> </mfrac> </mrow> <mo> /; </mo> <mrow> <mrow> <msub> <mi> z </mi> <mn> 2 </mn> </msub> <mo> - </mo> <msub> <mi> z </mi> <mn> 1 </mn> </msub> </mrow> <mo> &#8805; </mo> <mn> 0 </mn> </mrow> </mrow> <annotation-xml encoding='MathML-Content'> <apply> <ci> Condition </ci> <apply> <eq /> <apply> <power /> <apply> <times /> <apply> <ci> Subscript </ci> <ci> z </ci> <cn type='integer'> 1 </cn> </apply> <apply> <power /> <apply> <ci> Subscript </ci> <ci> z </ci> <cn type='integer'> 2 </cn> </apply> <cn type='integer'> -1 </cn> </apply> </apply> <ci> a </ci> </apply> <apply> <times /> <apply> <power /> <apply> <ci> Subscript </ci> <ci> z </ci> <cn type='integer'> 1 </cn> </apply> <ci> a </ci> </apply> <apply> <power /> <apply> <power /> <apply> <ci> Subscript </ci> <ci> z </ci> <cn type='integer'> 2 </cn> </apply> <ci> a </ci> </apply> <cn type='integer'> -1 </cn> </apply> </apply> </apply> <apply> <geq /> <apply> <plus /> <apply> <ci> Subscript </ci> <ci> z </ci> <cn type='integer'> 2 </cn> </apply> <apply> <times /> <cn type='integer'> -1 </cn> <apply> <ci> Subscript </ci> <ci> z </ci> <cn type='integer'> 1 </cn> </apply> </apply> </apply> <cn type='integer'> 0 </cn> </apply> </apply> </annotation-xml> </semantics> </math>

Cell[BoxData[RowBox[List[RowBox[List["HoldPattern", "[", SuperscriptBox[RowBox[List["(", FractionBox[SubscriptBox["z_", "1"], SubscriptBox["z_", "2"]], ")"]], "a_"], "]"]], "\[RuleDelayed]", RowBox[List[FractionBox[SubsuperscriptBox["zz", "1", "a"], SubsuperscriptBox["zz", "2", "a"]], "/;", RowBox[List[RowBox[List[SubscriptBox["zz", "2"], "-", SubscriptBox["zz", "1"]]], "\[GreaterEqual]", "0"]]]]]]]]

2001-10-29