Functions $f:\mathbb{R}\to\mathbb{R}$ with a local minimum at every point
34750
If every point is a local maximum, is it a step function?
114844
Global maxima/minima of $f(x,y,z) = x+y+z$ in $A$
129465
Minimizing Frobenius norm of a special type
80210
It is posible to have a function $f$ with the following property?
20199
Find a surjective function $f:\mathbb{N}\to \mathbb{Q}$
41557
Most general $A \subseteq \mathbb R$ to define derivative of $f: A \to \mathbb R$?
33308
Unique local extremum is absolute extremum for continuous functions
33734
Every closed subset $E\subseteq \mathbb{R}^n$ is the zero point set of a smooth function
113450
Construction of a function which is not the pointwise limit of a sequence of continuous functions
89257
Give an example of a function $f:\mathbb{R}^2 \mapsto \mathbb{R}^2$ such that
98772
Continuity of a function in $\mathbb{R}$
43189
Examples of continuous functions $f : \mathbb{R} \to \mathbb{R}$
10585
Does a polynomial that's bounded below have a global minimum?
9406
Compactness of $(M, d)$ in terms of continuous functions $f:M\to \mathbb R$
97772
An example of a function which satisfies $\sup_{y}\inf_{x}f(x,y)<\inf_{x}\sup_{y}f(x,y)$
47637
Are strict local minima of a general function always countable?
138720
Minimum principle in Hilbert space