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 Jul3 comment Help understanding this example of a linear operator which rotates each vector $v$ about the z-axis by an angle $\theta$ @Mark: thank you for the comment, unfortunately I do not know the formulae for rotations in any dimension at the moment... Jul3 asked Help understanding this example of a linear operator which rotates each vector $v$ about the z-axis by an angle $\theta$ Jul1 comment Understanding this partial derivative problem thank you again! Jul1 comment Understanding this partial derivative problem sorry, i had read your answer and thought it was a done deal, but i seem to still be stuck: taking the step you suggest, i get $\frac{\partial \theta}{\partial x} = - \frac{-3 \sin \theta}{e^{2r}} \frac{1}{3\sin^{2}\theta + 2\cos^{2} \theta}$. is there some way that i can change $3\sin^{2}\theta + 2\cos^{2}\theta$ into the expression $2+\sin^{2}\theta$ as in the solution above? Jul1 accepted Understanding this partial derivative problem Jul1 comment Understanding this partial derivative problem thank you for helping me with this arturo Jul1 comment Understanding this partial derivative problem this definitely does help, thank you Jun30 asked Understanding this partial derivative problem Jun4 accepted Does this equality always hold? Jun4 comment Does this equality always hold? thank you mixedmath Jun4 comment Does this equality always hold? excellent, thank you Jun4 comment Does this equality always hold? @Fabian: thank you Jun4 asked Does this equality always hold? May24 awarded Vox Populi May15 revised What is the best way to show that no positive powers of this matrix will be the identity matrix? rolled back to a previous revision May14 accepted Are bounded sequences always strictly less than some fixed number $M$? May14 comment Are bounded sequences always strictly less than some fixed number $M$? ok that totally makes sense, thank you for this answer. May14 asked Are bounded sequences always strictly less than some fixed number $M$? May9 awarded Fanatic May6 accepted Who was the mathematician who thought “god” was out to get him?