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Jan
3
comment Function on convex set is convex if all rays are convex
skeptical that it's true?
Jan
3
comment Function on convex set is convex if all rays are convex
I know you can't for a general domain $D$, but if we assume that $D$ is open and convex I was wondering if you could.
Jan
3
asked Function on convex set is convex if all rays are convex
Dec
30
awarded  Nice Question
Sep
24
awarded  Autobiographer
Aug
14
awarded  Popular Question
Aug
5
awarded  Popular Question
Jul
2
awarded  Curious
Jul
2
awarded  Inquisitive
May
15
awarded  Popular Question
Apr
16
asked Trouble seeing how Lagrange Multipliers are True
Apr
15
awarded  Popular Question
Apr
12
revised What property of a matrix causes $\|e^{tA}\|_2$ to oscillate as $t\rightarrow\infty$?
added 8 characters in body
Apr
12
revised What property of a matrix causes $\|e^{tA}\|_2$ to oscillate as $t\rightarrow\infty$?
edited body
Apr
12
asked What property of a matrix causes $\|e^{tA}\|_2$ to oscillate as $t\rightarrow\infty$?
Mar
30
comment Limit of infinite loops of sin x as n tends to infinity
Maybe use the fact that for $x\neq0$, $|\sin(x)|<|x|$. Also that $\sin(x)$ is strictly monotonically increasing on $[-1,1]$.
Mar
16
awarded  Popular Question
Mar
14
awarded  Yearling
Mar
11
revised Prove the set of sequences $c_0$ which converge to zero in $l_{\infty}$ is closed.
changed $l_0$ to $c_0$
Mar
11
comment Prove the set of sequences $c_0$ which converge to zero in $l_{\infty}$ is closed.
you're right I mis-typed it, I'll fix.