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May
18
comment Find the eigenvectors corresponding to an eigenvalue
to visualize try just multiplying a standard simple vector like $[1,1]^\top$ by a matrix with a partiular simple value of $x$ such as $\pi$ and plot the result. You should notice how it works quite quickly
May
15
accepted If $d|m$ show $U_m\rightarrow U_d$ under $\overline{f}$
May
14
revised Series Solution of an ODE
latexed and fixed tags
May
14
answered describe this graph in plain English
May
14
suggested approved edit on Series Solution of an ODE
May
14
answered Series Solution of an ODE
May
14
comment Series Solution of an ODE
series solutions are perfectly fine for first order. also - I think its clear they meant $\frac{dy}{dx}$
May
14
answered What is the principle components matrix in PCA with SVD.
Apr
14
comment Book recommendation for Abstract Algebra
how do we not yet have a community wiki for such posts for all major topics / levels.
Apr
5
comment Differential Equations (Undetermined Coefficients)
dont forget to solve the homogeneous problem first!
Mar
29
answered Solution of the parabolic equation $u_t=(axu)_{xx}-((bx+c)u)_x$
Dec
21
awarded  Constituent
Dec
21
awarded  Caucus
Oct
8
asked Why study physical differntial equations in$\mathbb{R}^n$
Sep
27
awarded  Yearling
Aug
19
comment Going Back to Grad School After Being Away from Math
Well a very popular one these days seems to be Stewarts book which is quite enormous, though fairly thorough. Spivak has a book that I havent read yet but have heard great things about. As i understand it it would also serve as a bit of a primer for analysis which could be quite useful for you.
Aug
19
answered Going Back to Grad School After Being Away from Math
Aug
13
accepted Decreasing function Mean Value Theorem proof
Aug
13
revised Decreasing function Mean Value Theorem proof
texed the problem and attempt
Aug
13
asked Decreasing function Mean Value Theorem proof