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seen Mar 28 at 23:11

Aug
20
comment What are the explanations for certain steps in these proofs for the irrationality/rationality of certain numbers?
thank you for this
Aug
20
comment What are the explanations for certain steps in these proofs for the irrationality/rationality of certain numbers?
thank you very much
Aug
20
accepted What are the explanations for certain steps in these proofs for the irrationality/rationality of certain numbers?
Aug
19
revised What are the explanations for certain steps in these proofs for the irrationality/rationality of certain numbers?
added 51 characters in body
Aug
19
comment What are the explanations for certain steps in these proofs for the irrationality/rationality of certain numbers?
@Bill: for context, this is me trying to go through the book Understanding Analysis by Stephen Abbott. Unfortunately I do not know any number theory or abstract algebra...
Aug
19
comment What are the explanations for certain steps in these proofs for the irrationality/rationality of certain numbers?
@kahen and John, thank you for your comments!
Aug
19
asked What are the explanations for certain steps in these proofs for the irrationality/rationality of certain numbers?
Jul
6
comment For which $k \in \mathbb{R}$ will this be a euclidean vector space?
thank you for the explanation!
Jul
6
accepted For which $k \in \mathbb{R}$ will this be a euclidean vector space?
Jul
5
asked For which $k \in \mathbb{R}$ will this be a euclidean vector space?
Jul
4
comment Help understanding this example of a linear operator which rotates each vector $v$ about the z-axis by an angle $\theta$
[at]Jason: thank you!
Jul
4
accepted Help understanding this example of a linear operator which rotates each vector $v$ about the z-axis by an angle $\theta$
Jul
3
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...
Jul
3
asked Help understanding this example of a linear operator which rotates each vector $v$ about the z-axis by an angle $\theta$
Jul
1
comment Understanding this partial derivative problem
thank you again!
Jul
1
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?
Jul
1
accepted Understanding this partial derivative problem
Jul
1
comment Understanding this partial derivative problem
thank you for helping me with this arturo
Jul
1
comment Understanding this partial derivative problem
this definitely does help, thank you
Jun
30
asked Understanding this partial derivative problem