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May
17
comment Integral evaluation $\int_{-\infty}^{\infty}\frac{\cos (ax)}{\pi (1+x^2)}dx$
Thanks very much. Whatever the motivation, it's a pleasure to watch you in action.
May
16
answered (Soft) What maths should I concentrate on at 16-18 years old?
May
16
comment Some users are mind bogglingly skilled at integration. How did they get there?
Hi again - maybe if I saw this before I sent you that message a few minutes ago, I probably would not have troubled you. I think this is a great explanation and inspiration. Thanks again,
May
16
comment Integral evaluation $\int_{-\infty}^{\infty}\frac{\cos (ax)}{\pi (1+x^2)}dx$
Dear Ron - Maybe you recall I expressed appreciation for your contribution. Not that this is quid pro quo, but maybe you would not mind my asking a general question, as I am currently self-studying a course in CA with substantially more intention than my prior endeavors. <<Other than cultivating the art and perseverance that it takes to solve these integrals, do they have any practical applications. By that I mean to other realms of math itself.>> I have seen in Edwards "RZF" there are a few integrals (a motivation). But other than coursework, I haven't seen much. Thanks Best regards,
May
14
accepted Show that an analytic function in a strip has a complex Fourier expansion
May
14
comment Solving the functional equation $f(x + y) + g(x-y) = \lambda g(x) f(y)$
In that it seems as if you are new here, you might consider making the title of your question more specific. This might generate a bit more interest, since everyone posting a question is asking for help.
May
13
comment What sequence should I study these topics in?
@seeker My pleasure. Thanks for the kind remark. Regards,
May
13
revised Show that an analytic function in a strip has a complex Fourier expansion
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May
13
revised Show that an analytic function in a strip has a complex Fourier expansion
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May
13
revised Show that an analytic function in a strip has a complex Fourier expansion
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May
13
answered Show that an analytic function in a strip has a complex Fourier expansion
May
12
asked Show that an analytic function in a strip has a complex Fourier expansion
May
8
comment Klein bottle and Real Projective plane
Since you're new here, don't forget to accept an answer (click on the check mark by it) if it works for you. Also, it's nice to upvote any answers that are beneficial. Regards,
May
6
accepted Interpreting little-$o$ notation
May
6
asked Interpreting little-$o$ notation
May
4
comment Why represent a complex number $a+ib$ as $[\begin{smallmatrix}a & -b\\ b & \hphantom{-}a\end{smallmatrix}]$?
Hi - tried to edit this to change $\theta$ to $cos \theta$ but didn't quite know how.
May
3
comment Geometrical Meaning of derivative of complex function
Can't believe this went a year without an upvote.
May
3
comment What does does [H1,H2] = 0 mean if each H is a hamiltonian of a quantum system
@LIEVBIRMAN Yes, that's correct.
May
3
revised What does does [H1,H2] = 0 mean if each H is a hamiltonian of a quantum system
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May
3
revised What does does [H1,H2] = 0 mean if each H is a hamiltonian of a quantum system
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