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 Apr9 awarded Notable Question Dec17 comment Explanation of method for showing that 0 / 0 is undefined No. I don't claim so. The whole post is a reductio ad absurdum. ("Let's say $0 \over 0$ was not indeterminate, then what should its value be?") Dec17 comment Explanation of method for showing that 0 / 0 is undefined @Anixx It's a common mathematical process: since the property is true for all $x > 0$ and for all $x < 0$ and $x \in \mathbb R$, then the property is also extended by continuity for $x = 0$. Of course doing it here does not lead to a correct result: that's the whole point of the answer. Dec16 awarded Caucus Nov11 awarded Yearling Oct29 revised How to accurately calculate the error function erf(x) with a computer? Removed signature (please add URLs to your profile insted) Oct29 suggested approved edit on How to accurately calculate the error function erf(x) with a computer? Oct10 comment How can I approximate the logarithm of the sum? @Rahul Wait, is $\log(1+\frac ab) \simeq \frac a b$?! That sounds... very strange. Oct10 asked How can I approximate the logarithm of the sum? Oct2 awarded Notable Question Sep30 awarded Explainer Jul15 awarded Popular Question Jul2 awarded Curious Jun12 awarded Nice Answer Jan19 revised Is $.\overline{9} = 1$? demoNstrandum Jan2 revised Number of arbitrary constants in the general solution of an ODE Backtick abuse. Jan2 suggested approved edit on Number of arbitrary constants in the general solution of an ODE Oct3 awarded Popular Question Jun13 comment Why is $n$ divided by $n$ equal to $1$? @Blue I think it's not so much that rules start making demands of us, but rather that it might be worth exploring how far you can extend the nice $a^{m+n}$ property so that it applies in more complex cases like (say) calculating $\sqrt[5]{a^4} \cdot \sqrt[5]{a^6} = a^\frac45\cdot a^\frac65 = a^2$. May18 awarded Constituent