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 Yearling
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Jun
19
comment Clarification on optimization problem
I think for any $\alpha_k$, the objective function is linear. Given that the constraint is also linear, the optimum lies in some corner point. Since $\alpha_5=1$ violates the constraint, so $\alpha_5=0$.
May
17
awarded  Yearling
Apr
20
comment Givens rotation and retraction mapping
Thanks. I am fine with the QR/polar decomposition and exponential mapping, but I am not clear about the part of Givens rotation in the text. Also, any references for the "closest" property of polar decomposition?
Apr
19
asked Givens rotation and retraction mapping
Apr
9
awarded  Notable Question
Mar
25
accepted Generic points as coefficients of polynomial kernels?
Mar
24
revised Generic points as coefficients of polynomial kernels?
edited title
Mar
24
asked Generic points as coefficients of polynomial kernels?
Feb
18
comment Homework problem on continuity
I think differentiability implies continuity.
Jan
23
comment $QQ$-plot - Why do we choose the empirical distribution $F_n(x) = \frac {\#\{y \in S \mid y \le x\}} n$, $S$ is sample, for comparison with normal?
Just to mention that there is another SE site for statistics: stats.stackexchange.com
Jan
23
comment Correspondence between an order of rational function field and a Dedekind cut
Thanks. Then where does the $a$ come from? It seems to me that $X>_{\mathbb{R}(x)}x\iff X-x>_{\mathbb{R}(x)}0\iff -x >_\mathbb{R}0 \iff x<_\mathbb{R} 0$.
Jan
23
asked Correspondence between an order of rational function field and a Dedekind cut
Jan
15
answered Mnemonic for cross product
Jan
8
comment How prove this inequality $(a^2+bc^4)(b^2+ca^4)(c^2+ab^4) \leq 64$
Maybe different patterns of lines, if that's convenient for you.
Jan
8
comment Set of critical points of polynomial: why finite
When you say a polynomial defined on $\mathbb{R}^n$, does it mean a multivariate polynomial with $n$ variables?
Jan
8
comment How prove this inequality $(a^2+bc^4)(b^2+ca^4)(c^2+ab^4) \leq 64$
Can you use other colors? Since many people have protanopia or protanomaly (like me).
Jan
7
revised Solve linear algebra expressions
3x3 -> 3\times 3
Jan
7
suggested approved edit on Solve linear algebra expressions
Jan
7
revised Mistake in Taylor expansion?
Texify the question
Jan
7
suggested approved edit on Mistake in Taylor expansion?