Dahn Jahn
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 Feb27 revised How to find the intersection of the $\mathcal R(A)$ and $\mathcal R(A^*)$ added latex - edit, sorry Feb27 suggested approved edit on How to find the intersection of the $\mathcal R(A)$ and $\mathcal R(A^*)$ Feb14 comment when to use sine vs cosine vs tangent SOH CAH TOA helps a lot to remember the rules, btw (just say it out loud a few times, shouting like a kendo fighter and you will never forget them, ever) Feb13 revised How I got this answer Corrected tags. Unsure about puzzle. Feb13 suggested approved edit on How I got this answer Feb12 comment Meaning of Clo(A), Int(A), Rint(A) Actually, thinking about it - why is optimalisation bad? Feb12 accepted Meaning of Clo(A), Int(A), Rint(A) Feb12 comment Meaning of Clo(A), Int(A), Rint(A) Thanks! Well the text is in Czech and optimalisation is my translation, so that would be mistake on my part, but as for the usage of those terms, you're right! Feb12 asked Meaning of Clo(A), Int(A), Rint(A) Feb12 comment How to verify that a basis is indeed a basis? (and Vector Spaces) Feb11 comment Formula for calculating parking time Just as a thought, I'd imagine converting to a 24-hour system might be helpful. Feb11 accepted How to check for division ring's definition. Feb11 revised How to check for division ring's definition. added 19 characters in body Feb11 comment How to check for division ring's definition. Ah, here's for the beginner's mistakes. Thanks. Feb11 comment How to check for division ring's definition. Uhm, I meant once again with modulo $3$, or am I missing something? If not then I'll add that to the question. Feb11 asked How to check for division ring's definition. Feb10 comment how do I find the inverse of this matrix? Probably yes. You wrote ${8e^{9^t}}$ and probably meant ${8e^{9t}}$. Do learn to use Mathjax notation! Feb10 answered how do I find the inverse of this matrix? Feb10 comment Online MathJaX editor @littleO look at my new answer to this question, the site I am linking might be able to do that, I think that in the introduction it mentioned something about posting it to a blog. Feb10 accepted Online MathJaX editor