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# 61 Actions

 Feb24 awarded Yearling Jan16 comment What's the pattern that will match a head anywhere in an expression How about patt[head]:= x_ /; ! FreeQ[x, _f]? Sep30 awarded Explainer Feb24 awarded Yearling Aug30 awarded Good Question Feb24 awarded Yearling Feb16 comment Method that can be used to collect the variables of a function How about Sequence @@ f[x, y, z]? Jan23 awarded Nice Answer Jan22 revised An apparently “simple” limit? added 228 characters in body Jan22 comment An apparently “simple” limit? @Kagaratsch: 1 is the correct result.... Jan22 answered An apparently “simple” limit? Dec15 comment Remove annoying Conjugate It is actually interesting that Mathematica does not realise that the Sqrt are harmless. In fact, it can simplify the expression when removing the -2 and having the assumptions Im[es]==Im[kx]==Im[ky]==0. Dec13 revised Singular integral: NIntegrate fails to converge fixed a typo Dec13 suggested approved edit on Singular integral: NIntegrate fails to converge Dec13 revised Singular integral: NIntegrate fails to converge deleted 11 characters in body Dec13 answered Singular integral: NIntegrate fails to converge Dec12 answered Find asymptotics of a function Sep26 awarded Nice Question Sep11 comment How to tell Mathematica that a function is dependent on other variables? Nice: +1 (and some more characters) Sep10 awarded Caucus