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Apr
24
revised Calculating $a_n$ in $\sum_{n=1}^\infty a_n \sin(\frac{n \pi}{2})=T_0$
() -> \left(\right)
Apr
24
suggested approved edit on Calculating $a_n$ in $\sum_{n=1}^\infty a_n \sin(\frac{n \pi}{2})=T_0$
Apr
10
comment How many distinct elements are there in $C=\{zw\mid z∈A$,$w∈B\}, z^{24}=1$ and $w^{54}=1$.
But this is anyway an algebra problem.
Apr
8
revised Why are additional constraint and penalty term equivalent in ridge regression?
deleted 8 characters in body
Apr
7
revised Why are additional constraint and penalty term equivalent in ridge regression?
added 748 characters in body
Apr
7
revised How to solve the least square with $L_2$ norm constraint directly?
deleted 70 characters in body
Apr
7
revised How to solve the least square with $L_2$ norm constraint directly?
added 72 characters in body
Apr
7
revised The positive-definite-ness of RBF kernel
deleted 5 characters in body
Apr
7
asked How to solve the least square with $L_2$ norm constraint directly?
Apr
6
revised Why are additional constraint and penalty term equivalent in ridge regression?
added 17 characters in body
Apr
6
answered Why are additional constraint and penalty term equivalent in ridge regression?
Apr
6
comment Why are additional constraint and penalty term equivalent in ridge regression?
Can you briefly summarize the paper (since the journal version has some pages)?
Apr
6
comment Why are additional constraint and penalty term equivalent in ridge regression?
If $\alpha=0$, does it mean the corresponding $c$ can be any non-negative number, according to the second KKT condition?
Mar
20
revised How to compute/ find cancellation for the second group cohomology $H^2(G,A)$?
Added a missing $ in the title
Mar
20
suggested approved edit on How to compute/ find cancellation for the second group cohomology $H^2(G,A)$?
Jan
27
comment Does Euclidean division not work for general polynomials?
ED implies PID. But only polynomials of one variable can form a PID. So no.
Jan
25
asked Equivalence of the partial least square regresssion's iterative algorithm and its optimization problem
Dec
9
awarded  Excavator
Dec
9
revised Does the curvature determine the metric?
log -> \log, cos -> \cos, sin -> \sin
Dec
9
suggested approved edit on Does the curvature determine the metric?