New posts in functions

Why is this (image) function transformation not logical?

functions coordinate-systems transformation

Show that the function $f(x)=\left(\sqrt{\frac{e}{2}}\cdot\frac{e}{\pi}\right)-\frac{1}{x}+\left(\frac{e}{2}-\frac{x}{e^{x}}\right)-x$ is negative

functions inequality constraints constants

When I was teaching absolute function properties, I suddenly made this question ...

functions graphing-functions absolute-value education

$f(x)f(1/x)=f(x)+f(1/x)$

analysis functions polynomials functional-equations

Is there any continuous surjective map from $\mathbb{R}^3$ to $\mathbb{R}^3$ s.t. for every $x$ in $\mathbb{R}^3$ $f(x) \cdot x= 0$?

functions algebraic-topology

Maximizing curious symmetric function from simple combinatorics

combinatorics functions inequality nonlinear-optimization

Existence of two real numbers satisfying $f(x-f(y))>yf(x)+x$

real-analysis functions inequality

If f has limit l and g has limit m, prove that the limit of the maximum is the maximum of the limits

calculus limits functions

Is there a smooth, preferably analytic function that grows faster than any function in the sequence $e^x, e^{e^x}, e^{e^{e^x}}...$

functions recreational-mathematics interpolation elementary-functions smooth-functions

Parallel functions.

functions calculus plane-curves

Iterated self-composition of arbitrary function

functions notation

The origin of the function $f(x)$ notation

functions notation math-history

Constructing a quasiconvex function

functions convex-analysis convex-optimization

What's the difference between a bijection and an isomorphism? [duplicate]

functions elementary-set-theory

Terms for "natural gender" and "grammatical gender"

nouns grammatical-gender category functions

Limit Laws for Composite Functions

calculus limits functions function-and-relation-composition

$\cos(x)+\cos(x\sqrt{2})$ is not periodic

calculus functions trigonometry periodic-functions

Is inclusion map not the same as identity?

functions elementary-set-theory

The notion of equality when considering composition of functions

algebra-precalculus functions

Determining all $f : \mathbb R^+ \to \mathbb R^+$ that satisfy $f(x + y) = f\left(x^2 + y^2\right)$

functions contest-math solution-verification functional-equations