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2d
comment A min-max problem and convex optimization problem.
+1Interesting. But I have to think better of the geometric intuition of Lagrange multipliers to restrictions inequality.
2d
comment A min-max problem and convex optimization problem.
But the theorem of Lagrandge multiplier applies only to restrictions equally. It does not make sense to apply the theorem of Lagrange multipliers to restrictions inequality.
2d
asked A min-max problem and convex optimization problem.
May
13
answered $ d(x,y)^2 \le d(x,z)^2 - d(y,z)^2\color{}{+\varphi\big(x,y,z,d(x,y),d(y,z) \big)}? $
May
2
comment Number of circuits that surround the square.
see also another related question here.
May
2
comment The problem of the most visited point.
see also another related question here.
Apr
27
revised Existence and uniqueness theorems for ODE. Log-Lipschitz regularity.
added 3 characters in body; edited tags
Apr
27
comment Why $\int_{\mathbb R^n}e^{-\sum_{i=1}^n x_i^2} \, dx_1\cdots dx_n=\omega_{n-1}\int_0^\infty e^{-r^2}r^{n-1} \, dr$
Did you mean that $\sum_{i=1}^1 x_i^2=1$ rather than $\sum_{i=1}^1 x_i=1$ ?
Apr
27
comment Why $\int_{\mathbb R^n}e^{-\sum_{i=1}^n x_i^2} \, dx_1\cdots dx_n=\omega_{n-1}\int_0^\infty e^{-r^2}r^{n-1} \, dr$
Did you mean that $\omega_{n-1}$ is the area of surface rather than $\omega_{n-1}$ be the surface?
Apr
23
reviewed Approve What is cosine to the power of zero?
Apr
17
revised Proof on the inequality involving matrix splitting and trace operator
Language problems correction.
Apr
15
revised Evaluating: $I_1 = \sin^{-1} \left(\sqrt{\frac{x}{x+a}}\;\right) $
added 10 characters in body; edited title
Apr
11
awarded  Nice Question
Apr
5
revised If $f$ is a continuous function such that $|f(x+y)-f(x)-f(y)|$ is bounded and $f(n)=o(n)$, then $f$ is bounded
added 55 characters in body
Apr
5
answered If $f$ is a continuous function such that $|f(x+y)-f(x)-f(y)|$ is bounded and $f(n)=o(n)$, then $f$ is bounded
Apr
4
revised When a function contains a sequence, and how to find the function's limit?
better clarification of the equalities used
Apr
4
revised If $\lim_{x\to0} f(x)+g(x)$ and $\lim_{x\to0} f(x)g(x)$ exist simultaneously, are there any $f(x)$ and $g(x)$ that do not have limit
deleted 310 characters in body
Apr
4
revised If $\lim_{x\to0} f(x)+g(x)$ and $\lim_{x\to0} f(x)g(x)$ exist simultaneously, are there any $f(x)$ and $g(x)$ that do not have limit
added 80 characters in body
Apr
4
revised If $\lim_{x\to0} f(x)+g(x)$ and $\lim_{x\to0} f(x)g(x)$ exist simultaneously, are there any $f(x)$ and $g(x)$ that do not have limit
added 152 characters in body
Apr
4
revised If $\lim_{x\to0} f(x)+g(x)$ and $\lim_{x\to0} f(x)g(x)$ exist simultaneously, are there any $f(x)$ and $g(x)$ that do not have limit
added 124 characters in body