Determining if a function of two variables is convex
50051
Interpret geometrically the equation
18763
injective holomorphic function on a convex set
24230
Proof that CRF models and logistic models are convex functions
103367
Is inverse matrix convex?
109097
Is there a unique saddle value for a convex/concave optimization?
15491
Prove that $f:\mathbb R^n\to\mathbb R$ is affine if and only if it is convex and concave
91123
A convex function is differentiable at all but countably many points
71829
Is closure of convex subset of $X$ is again a convex subset of $X$?
72033
Is this proof sufficient to show that a concave function of a metric is also a metric?
10352
Prove that $x^n$ is a convex function on $(0,\infty)$
52231
Prove or disprove {$\sum_{i=1}^n x_i^2 = 1$} is convex
20614
Example of a function such that $\varphi\left(\frac{x+y}{2}\right)\leq \frac{\varphi(x)+\varphi(y)}{2}$ but $\varphi$ is not convex
86305
A secant inequality for convex functions
97584
How to prove this property using convexity?
94270
Test if point is in convex hull of $n$ points
32611
Is the trace of inverse matrix convex?
9451
Show bounded and convex function on $\mathbb R$ is constant