user18297
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 Feb13 comment Showing this integral from complex analysis is an integer without residues I see now that I made a mistake in my original post. I'll correct it. Feb7 comment A proof (?) of a Cauchy Integral Theorem type claim I forgot to ask a question. The question is, have I erred? I would guess this isn't at all the proof which is expected, and I haven't had much experience using LDCT "in the wild" before, so I am, as usual, a bit uncertain. Jan24 comment Limit of exp(z) along a half-line Thanks for pointing that out. Jan18 comment Convergence of a power series in the complex plane — does this argument work? Oh, I see. So, to get a derivation which is justified at each step from left to right, I should present the original chain of equalities backwards. Then I can forget about the bound. Jan17 comment Convergence of a power series in the complex plane — does this argument work? Thanks all. I think I'll type up the bounding of $|cos(nz)|$ once I've worked it out. Jan17 comment Determining where a function is complex differentiable Thanks. I don't know how I missed that the equations are always satisfied when y=0. It's quite obvious now. Jan17 comment Determining where a function is complex differentiable Thanks for your answer. Dec19 comment Why probability measures in ergodic theory? The second question is addressed in this thread: mathoverflow.net/questions/31603/… Dec15 comment Composition series of the ring R of 3x3 real matrices as an R-module and as a Real-Module Yes. Where I went wrong was considering subrings at all, right? Because ideals in $R$ are $R$-modules and it makes sense to consider their factors. This is all we need. Dec14 comment An example of an infinite non-abelian solvable group Thank you all. I'll look into these suggestions. Oct26 comment If G is a group of order n=35, then it is cyclic I can't see what's wrong with it, but I have a hard time believing that so many people would overlook this proof it it were correct.