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 | | http://functions.wolfram.com/01.05.16.0002.01 | 
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 | | Log[a, Subscript[z, 1] Subscript[z, 2]] == Log[a, Subscript[z, 1]] + 
   Log[a, Subscript[z, 2]] /; Subscript[z, 1] + Subscript[z, 2] >= 0 | 
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 | | Cell[BoxData[RowBox[List[RowBox[List[RowBox[List["Log", "[", RowBox[List["a", ",", RowBox[List[SubscriptBox["z", "1"], " ", SubscriptBox["z", "2"]]]]], "]"]], "\[Equal]", RowBox[List[RowBox[List["Log", "[", RowBox[List["a", ",", SubscriptBox["z", "1"]]], "]"]], "+", RowBox[List["Log", "[", RowBox[List["a", ",", SubscriptBox["z", "2"]]], "]"]]]]]], "/;", "  ", RowBox[List[RowBox[List[SubscriptBox["z", "1"], "+", " ", SubscriptBox["z", "2"]]], "\[GreaterEqual]", "0"]]]]]] | 
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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>  <mrow>  <msub>  <mi> log </mi>  <mi> a </mi>  </msub>  <mo> ( </mo>  <mrow>  <msub>  <mi> z </mi>  <mn> 1 </mn>  </msub>  <mo> ⁢ </mo>  <msub>  <mi> z </mi>  <mn> 2 </mn>  </msub>  </mrow>  <mo> ) </mo>  </mrow>  <mo> ⩵ </mo>  <mrow>  <mrow>  <msub>  <mi> log </mi>  <mi> a </mi>  </msub>  <mo> ( </mo>  <msub>  <mi> z </mi>  <mn> 1 </mn>  </msub>  <mo> ) </mo>  </mrow>  <mo> + </mo>  <mrow>  <msub>  <mi> log </mi>  <mi> a </mi>  </msub>  <mo> ( </mo>  <msub>  <mi> z </mi>  <mn> 2 </mn>  </msub>  <mo> ) </mo>  </mrow>  </mrow>  </mrow>  <mo> /; </mo>  <mrow>  <mrow>  <msub>  <mi> z </mi>  <mn> 1 </mn>  </msub>  <mo> + </mo>  <msub>  <mi> z </mi>  <mn> 2 </mn>  </msub>  </mrow>  <mo> ≥ </mo>  <mn> 0 </mn>  </mrow>  </mrow>  <annotation-xml encoding='MathML-Content'>  <apply>  <ci> Condition </ci>  <apply>  <eq />  <apply>  <log />  <logbase>  <ci> a </ci>  </logbase>  <apply>  <times />  <apply>  <ci> Subscript </ci>  <ci> z </ci>  <cn type='integer'> 1 </cn>  </apply>  <apply>  <ci> Subscript </ci>  <ci> z </ci>  <cn type='integer'> 2 </cn>  </apply>  </apply>  </apply>  <apply>  <plus />  <apply>  <log />  <logbase>  <ci> a </ci>  </logbase>  <apply>  <ci> Subscript </ci>  <ci> z </ci>  <cn type='integer'> 1 </cn>  </apply>  </apply>  <apply>  <log />  <logbase>  <ci> a </ci>  </logbase>  <apply>  <ci> Subscript </ci>  <ci> z </ci>  <cn type='integer'> 2 </cn>  </apply>  </apply>  </apply>  </apply>  <apply>  <geq />  <apply>  <plus />  <apply>  <ci> Subscript </ci>  <ci> z </ci>  <cn type='integer'> 1 </cn>  </apply>  <apply>  <ci> Subscript </ci>  <ci> z </ci>  <cn type='integer'> 2 </cn>  </apply>  </apply>  <cn type='integer'> 0 </cn>  </apply>  </apply>  </annotation-xml>  </semantics>  </math> 
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 | | Cell[BoxData[RowBox[List[RowBox[List["HoldPattern", "[", RowBox[List["Log", "[", RowBox[List["a_", ",", RowBox[List[SubscriptBox["z_", "1"], " ", SubscriptBox["z_", "2"]]]]], "]"]], "]"]], "\[RuleDelayed]", RowBox[List[RowBox[List[RowBox[List["Log", "[", RowBox[List["a", ",", SubscriptBox["zz", "1"]]], "]"]], "+", RowBox[List["Log", "[", RowBox[List["a", ",", SubscriptBox["zz", "2"]]], "]"]]]], "/;", RowBox[List[RowBox[List[SubscriptBox["zz", "1"], "+", SubscriptBox["zz", "2"]]], "\[GreaterEqual]", "0"]]]]]]]] | 
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 | | Date Added to functions.wolfram.com (modification date) | 
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