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comment Please explain the intuition behind the dual problem in optimization.
Terrific explanation. Many thanks.
Apr
16
revised Is the smallest singular value able to measure the similarity between two matrices?
added 88 characters in body
Apr
16
comment Is the smallest singular value able to measure the similarity between two matrices?
Sorry for the confusion. (a) $A$ and $B$ are not necessarily square matrices. (b) span $B$ means the column space of $B$.
Apr
15
awarded  Yearling
Apr
15
asked Is the smallest singular value able to measure the similarity between two matrices?
Oct
18
accepted integrate $\int_0^{\pi/2}\frac{\sin^3t}{\sin^3t+\cos^3t}dt$?
Oct
18
asked integrate $\int_0^{\pi/2}\frac{\sin^3t}{\sin^3t+\cos^3t}dt$?
Oct
17
comment groups generated by two distinct primes
Would you please explain a little bit more? For example, let $p=3$ and $q=5$, the set becomes $\{3,15,243\}$. How can this be a group? Thanks a lot.
Oct
17
asked groups generated by two distinct primes
Oct
17
awarded  Popular Question
Sep
8
accepted Iteration to find squre root of positive semidefinite matrix
Sep
8
comment Iteration to find squre root of positive semidefinite matrix
Thanks. The second half of your hint helps a lot.
Sep
8
revised Iteration to find squre root of positive semidefinite matrix
edited body
Sep
8
asked Iteration to find squre root of positive semidefinite matrix
Jun
20
accepted Monotonicity of $\ell_p$ norm
Jun
19
revised Monotonicity of $\ell_p$ norm
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Jun
19
asked Monotonicity of $\ell_p$ norm
Jun
13
revised a problem related to inverse function theorem
added 543 characters in body
Jun
13
asked a problem related to inverse function theorem
Apr
2
asked Anyone saw this interesting function before?