|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
http://functions.wolfram.com/01.34.22.0001.01
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
FourierTransform[Max[Subscript[t, 1], Subscript[t, 2]],
{Subscript[t, 1], Subscript[t, 2]}, {Subscript[z, 1], Subscript[z, 2]}] ==
-(DiracDelta[Subscript[z, 1] + Subscript[z, 2]]/Subscript[z, 1]^2) -
I Pi (DiracDelta[Subscript[z, 2]] D[DiracDelta[Subscript[z, 1]],
Subscript[z, 1]] + DiracDelta[Subscript[z, 1]]
D[DiracDelta[Subscript[z, 2]], Subscript[z, 2]])
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Cell[BoxData[RowBox[List[RowBox[List["FourierTransform", "[", RowBox[List[RowBox[List["Max", "[", RowBox[List[SubscriptBox["t", "1"], ",", SubscriptBox["t", "2"]]], "]"]], ",", RowBox[List["{", RowBox[List[SubscriptBox["t", "1"], ",", SubscriptBox["t", "2"]]], "}"]], ",", RowBox[List["{", RowBox[List[SubscriptBox["z", "1"], ",", SubscriptBox["z", "2"]]], "}"]]]], "]"]], "\[Equal]", RowBox[List[RowBox[List["-", FractionBox[RowBox[List["DiracDelta", "[", RowBox[List[SubscriptBox["z", "1"], "+", SubscriptBox["z", "2"]]], "]"]], SubsuperscriptBox["z", "1", "2"]]]], "-", RowBox[List["\[ImaginaryI]", " ", "\[Pi]", " ", RowBox[List["(", RowBox[List[RowBox[List[RowBox[List["DiracDelta", "[", SubscriptBox["z", "2"], "]"]], " ", RowBox[List["D", "[", RowBox[List[RowBox[List["DiracDelta", "[", SubscriptBox["z", "1"], "]"]], ",", SubscriptBox["z", "1"]]], "]"]]]], "+", RowBox[List[RowBox[List["DiracDelta", "[", SubscriptBox["z", "1"], "]"]], " ", RowBox[List["D", "[", RowBox[List[RowBox[List["DiracDelta", "[", SubscriptBox["z", "2"], "]"]], ",", SubscriptBox["z", "2"]]], "]"]]]]]], ")"]]]]]]]]]]
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
<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> ℱ </mi> <mrow> <mo> ( </mo> <mrow> <msub> <mi> t </mi> <mn> 1 </mn> </msub> <mo> , </mo> <msub> <mi> t </mi> <mn> 2 </mn> </msub> </mrow> <mo> ) </mo> </mrow> </msub> <mo> [ </mo> <mrow> <mi> max </mi> <mo> ⁡ </mo> <mo> ( </mo> <mrow> <msub> <mi> t </mi> <mn> 1 </mn> </msub> <mo> , </mo> <msub> <mi> t </mi> <mn> 2 </mn> </msub> </mrow> <mo> ) </mo> </mrow> <mo> ] </mo> </mrow> <mo> ⁢ </mo> <mrow> <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> </mrow> <mo> ⩵ </mo> <mrow> <mrow> <mrow> <mo> - </mo> <mi> ⅈ </mi> </mrow> <mo> ⁢ </mo> <mi> π </mi> <mo> ⁢ </mo> <mrow> <mo> ( </mo> <mrow> <mrow> <mrow> <semantics> <mi> δ </mi> <annotation-xml encoding='MathML-Content'> <ci> DiracDelta </ci> </annotation-xml> </semantics> <mo> ( </mo> <msub> <mi> z </mi> <mn> 2 </mn> </msub> <mo> ) </mo> </mrow> <mo> ⁢ </mo> <mrow> <msup> <mi> δ </mi> <mo> ′ </mo> </msup> <mo> ( </mo> <msub> <mi> z </mi> <mn> 1 </mn> </msub> <mo> ) </mo> </mrow> </mrow> <mo> + </mo> <mrow> <mrow> <semantics> <mi> δ </mi> <annotation-xml encoding='MathML-Content'> <ci> DiracDelta </ci> </annotation-xml> </semantics> <mo> ( </mo> <msub> <mi> z </mi> <mn> 1 </mn> </msub> <mo> ) </mo> </mrow> <mo> ⁢ </mo> <mrow> <msup> <mi> δ </mi> <mo> ′ </mo> </msup> <mo> ( </mo> <msub> <mi> z </mi> <mn> 2 </mn> </msub> <mo> ) </mo> </mrow> </mrow> </mrow> <mo> ) </mo> </mrow> </mrow> <mo> - </mo> <mfrac> <mrow> <semantics> <mi> δ </mi> <annotation-xml encoding='MathML-Content'> <ci> DiracDelta </ci> </annotation-xml> </semantics> <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> <msubsup> <mi> z </mi> <mn> 1 </mn> <mn> 2 </mn> </msubsup> </mfrac> </mrow> </mrow> <annotation-xml encoding='MathML-Content'> <mrow> <mrow> <mrow> <msub> <mi> ℱ </mi> <mrow> <mo> ( </mo> <mrow> <msub> <mi> t </mi> <mn> 1 </mn> </msub> <mo> , </mo> <msub> <mi> t </mi> <mn> 2 </mn> </msub> </mrow> <mo> ) </mo> </mrow> </msub> <mo> [ </mo> <mrow> <mi> max </mi> <mo> ⁡ </mo> <mo> ( </mo> <mrow> <msub> <mi> t </mi> <mn> 1 </mn> </msub> <mo> , </mo> <msub> <mi> t </mi> <mn> 2 </mn> </msub> </mrow> <mo> ) </mo> </mrow> <mo> ] </mo> </mrow> <mo> ⁢ </mo> <mrow> <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> </mrow> <mo> ⩵ </mo> <mrow> <mrow> <mrow> <mo> - </mo> <mi> ⅈ </mi> </mrow> <mo> ⁢ </mo> <mi> π </mi> <mo> ⁢ </mo> <mrow> <mo> ( </mo> <mrow> <mrow> <mrow> <semantics> <mi> δ </mi> <annotation-xml encoding='MathML-Content'> <ci> DiracDelta </ci> </annotation-xml> </semantics> <mo> ( </mo> <msub> <mi> z </mi> <mn> 2 </mn> </msub> <mo> ) </mo> </mrow> <mo> ⁢ </mo> <mrow> <msup> <mi> δ </mi> <mo> ′ </mo> </msup> <mo> ( </mo> <msub> <mi> z </mi> <mn> 1 </mn> </msub> <mo> ) </mo> </mrow> </mrow> <mo> + </mo> <mrow> <mrow> <semantics> <mi> δ </mi> <annotation-xml encoding='MathML-Content'> <ci> DiracDelta </ci> </annotation-xml> </semantics> <mo> ( </mo> <msub> <mi> z </mi> <mn> 1 </mn> </msub> <mo> ) </mo> </mrow> <mo> ⁢ </mo> <mrow> <msup> <mi> δ </mi> <mo> ′ </mo> </msup> <mo> ( </mo> <msub> <mi> z </mi> <mn> 2 </mn> </msub> <mo> ) </mo> </mrow> </mrow> </mrow> <mo> ) </mo> </mrow> </mrow> <mo> - </mo> <mfrac> <mrow> <semantics> <mi> δ </mi> <annotation-xml encoding='MathML-Content'> <ci> DiracDelta </ci> </annotation-xml> </semantics> <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> <msubsup> <mi> z </mi> <mn> 1 </mn> <mn> 2 </mn> </msubsup> </mfrac> </mrow> </mrow> </annotation-xml> </semantics> </math>
|
|
|
|
|
|
|
|
|
|
| |
|
|
|
|
| Cell[BoxData[RowBox[List[RowBox[List["HoldPattern", "[", RowBox[List["FourierTransform", "[", RowBox[List[RowBox[List["Max", "[", RowBox[List[SubscriptBox["t_", "1"], ",", SubscriptBox["t_", "2"]]], "]"]], ",", RowBox[List["{", RowBox[List[SubscriptBox["t_", "1"], ",", SubscriptBox["t_", "2"]]], "}"]], ",", RowBox[List["{", RowBox[List[SubscriptBox["z_", "1"], ",", SubscriptBox["z_", "2"]]], "}"]]]], "]"]], "]"]], "\[RuleDelayed]", RowBox[List[RowBox[List["-", FractionBox[RowBox[List["DiracDelta", "[", RowBox[List[SubscriptBox["zz", "1"], "+", SubscriptBox["zz", "2"]]], "]"]], SubsuperscriptBox["zz", "1", "2"]]]], "-", RowBox[List["\[ImaginaryI]", " ", "\[Pi]", " ", RowBox[List["(", RowBox[List[RowBox[List[RowBox[List["DiracDelta", "[", SubscriptBox["zz", "2"], "]"]], " ", RowBox[List[SubscriptBox["\[PartialD]", RowBox[List[SubscriptBox["zz", "1"]]]], RowBox[List["DiracDelta", "[", SubscriptBox["zz", "1"], "]"]]]]]], "+", RowBox[List[RowBox[List["DiracDelta", "[", SubscriptBox["zz", "1"], "]"]], " ", RowBox[List[SubscriptBox["\[PartialD]", RowBox[List[SubscriptBox["zz", "2"]]]], RowBox[List["DiracDelta", "[", SubscriptBox["zz", "2"], "]"]]]]]]]], ")"]]]]]]]]]] |
|
|
|
|
|
|
|
|
|
|
Date Added to functions.wolfram.com (modification date)
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|