Orest Xherija
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 Mar3 comment Any open subset of $\Bbb R$ is a at most countable union of disjoint open intervals. [Collecting Proofs] Oh, OK! Thanks! Mar2 asked Any open subset of $\Bbb R$ is a at most countable union of disjoint open intervals. [Collecting Proofs] Feb27 comment Mathematical preparation for postgraduate studies in Linguistics @AveMaleficum I have further updated the post. Some useful links have been added, should you wish to consult them. Feb27 revised Mathematical preparation for postgraduate studies in Linguistics added 501 characters in body Feb26 comment Mathematical preparation for postgraduate studies in Linguistics Thank you! I will try to extend this as much as possible and provide links to other resources too. Did you check the one suggested in the update I made? Feb24 answered For what value is the local minimum the largest? Feb24 revised Definite Integral with a discontinuty Spelling corrected Feb24 comment Definite Integral with a discontinuty I don't think the problem is the discontinuity itself, but rather the fact that the integrand seems to blow up at $x = 0$. Feb24 suggested approved edit on Definite Integral with a discontinuty Feb24 answered Definite Integral with a discontinuty Feb22 revised Suppose $f: M \to M$ is a contraction, but $M$ is not necessarily complete Spelling corrected Feb22 suggested approved edit on Suppose $f: M \to M$ is a contraction, but $M$ is not necessarily complete Feb22 answered Does a norm have to map to $\mathbb R$? Feb22 revised Differential Equation : $f '' = f '$ added 134 characters in body Feb22 comment Differential Equation : $f '' = f '$ You are indeed correct to point out that flaw. But that does not mean the proof is not rigorous. It only means that there is one more case to be checked. I will add it. Feb21 answered Motivation for the importance of topology Feb21 comment Differential Equation : $f '' = f '$ No harm done! (: Feb21 comment Differential Equation : $f '' = f '$ That's impossible! The first derivative will be some number but the second will be 0. How are they working? Feb21 comment Differential Equation : $f '' = f '$ Thank you for pointing that out! Thanks @Chris Taylor for editing the solution. Feb21 revised Differential Equation : $f '' = f '$ added 164 characters in body