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  • 9 votes cast
Apr
27
awarded  Popular Question
Jan
25
awarded  Nice Question
Dec
16
awarded  Caucus
Jul
26
awarded  Notable Question
Jan
16
awarded  Popular Question
Apr
27
accepted Sum over cosines = dirac delta - how to get the coefficients?
Apr
27
comment Sum over cosines = dirac delta - how to get the coefficients?
I edited my question, I forget the boundaries, sorry.
Apr
27
revised Sum over cosines = dirac delta - how to get the coefficients?
boundaries
Apr
27
comment Sum over cosines = dirac delta - how to get the coefficients?
@Did This is from a physical problem. There's the restriction $0 \leq x \leq d$.
Apr
27
asked Sum over cosines = dirac delta - how to get the coefficients?
Nov
10
comment Maybe Things Can be Divided by Zero
But I could start with f(x) = x that is defined everywhere and expand it by x/x to f(x) = x^2/x. This should not be defined at x = 0 suddenly? Isn't it so that a function is defined everyhwere when the numerator has a higher power than the denominator? Or the other way round: If I take the limit z -> 1 in the question, I think this would be allowed and leead to the result 2.
Nov
10
awarded  Editor
Nov
10
comment What's more common? Re / Im or Fraktur-R / Fraktur-I for real / imaginary part?
Because of Latex I'm actually here. I was wondering if there's a special reason why Latex defaults \Re and \Im to the Fraktur versions.
Nov
10
revised What's more common? Re / Im or Fraktur-R / Fraktur-I for real / imaginary part?
corrected Latex
Nov
10
comment What's more common? Re / Im or Fraktur-R / Fraktur-I for real / imaginary part?
Thanks, corrected.
Nov
10
asked What's more common? Re / Im or Fraktur-R / Fraktur-I for real / imaginary part?
Nov
2
awarded  Scholar
Nov
2
awarded  Supporter
Nov
2
comment Partial derivative: Why does substitution order matter?
Thanks all of you. I chose this answer as the correct one in combination with Willies comment which solved my problem fully ("independent" was the keyword, I was not aware of this).
Nov
2
accepted Partial derivative: Why does substitution order matter?