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 18h comment What is the determinant of the sum of a diagonal matrix and a matrix of ones? @HagenvonEitzen When exactly one entry in the diagonal is $1$, the result is $\prod_i(a_{ii}-[a_{ii}\neq1]),$ where $[p]$ is the Iverson bracket. If more than one entry is $1$, the result is $0$. 20h comment What is the determinant of the sum of a diagonal matrix and a matrix of ones? @deinst I think that covers it. Would you mind copying the relevant part of that answer into an answer to this question so I can mark this as accepted? I can do this myself, too, if you don't want to. 20h revised What is the determinant of the sum of a diagonal matrix and a matrix of ones? Get rid of a pesky typo 20h asked What is the determinant of the sum of a diagonal matrix and a matrix of ones? Apr11 accepted Is there a totally ordered set we can map any other totally ordered set to? Apr11 comment How to prove that $\lim\limits_{x\to0}\frac{\sin x}x=1$? While this is indeed an interesting approach, integrals haven't been taught at the point where this limit is proved. Thank you for your answer though. Mar24 awarded Notable Question Mar23 comment What is the lower bound for an algorithm that reconstructs a permutation? I fixed a couple of typos. I'm sorry if that changes your answer. Mar23 revised What is the lower bound for an algorithm that reconstructs a permutation? fix typos Mar23 asked What is the lower bound for an algorithm that reconstructs a permutation? Mar13 awarded Famous Question Mar13 revised How to prove that $\lim\limits_{x\to0}\frac{\sin x}x=1$? formatting. Mar13 comment How to prove that $\lim\limits_{x\to0}\frac{\sin x}x=1$? Indeed, it's easy to see that this holds if one uses a series, but this question starts on the prerequisite that one does not use a series. Mar13 suggested approved edit on How to prove that $\lim\limits_{x\to0}\frac{\sin x}x=1$? Mar4 awarded Great Question Mar3 comment Is there a totally ordered set we can map any other totally ordered set to? I edited the question because I thought that the case $|O|=|\mathbb N|$ might be interesting, too. Thank you for researching this! Mar3 comment Is there a totally ordered set we can map any other totally ordered set to? @AndresCaicedo Thank you. I'll see if my university's library has that. Mar3 revised Is there a totally ordered set we can map any other totally ordered set to? added 2 characters in body Mar3 asked Is there a totally ordered set we can map any other totally ordered set to? Jan1 awarded Yearling