New posts in functions

What is the purpose of a function being surjective?

functions elementary-set-theory

Some confusion about what a function "really is".

functions elementary-set-theory definition philosophy foundations

A function $f$ such that $f(x)$ increases from $0$ to $1$ when $x$ increases from $0$ to infinity?

real-analysis algebra-precalculus functions

Proving that a function (involving the Cantor discontinuum ) is surjective.

real-analysis general-topology functions solution-verification

Show that the maximum value of this nested radical is $\phi-1$

functions recursion maxima-minima nested-radicals golden-ratio

Determine the highest order of an element of a Rubik's Cube group

group-theory functions recreational-mathematics rubiks-cube

Why isn't the inverse of the function $x\mapsto x+\sin(x)$ expressible in terms of "the functions one finds on a calculator"?

functions field-theory galois-theory

Inverse of a Function exists iff Function is bijective

functions elementary-set-theory inverse

Let $(a,b)$ and $(c,d)$ be intervals in $\Bbb R$, and find an injective and surjective function from $(a,b)$ to $(c,d)$

functions discrete-mathematics

BMO1 2009/10 Q5 functional equation: $f(x)f(y) = f(x + y) + xy$

functions contest-math functional-equations

Range of a Rational Function

functions quadratics rational-functions

Is there any "superlogarithm" or something to solve $x^x$? [duplicate]

algebra-precalculus functions

Expanded concept of elementary function?

calculus functions

Infinite series, injective function and rearrangement inequality

calculus sequences-and-series functions

If a function is undefined at a point, is it also discontinuous at that point?

real-analysis functions continuity

second derivative of the inverse function

ordinary-differential-equations functions derivatives inverse

Idempotency and Fixed-point combinators

functions lambda-calculus fixed-points idempotents

Is this proof correct for : Does $F(A)\cap F(B)\subseteq F(A\cap B) $ for all functions $F$?

elementary-set-theory functions

Proving that the tangent to a convex function is always below the function [duplicate]

real-analysis functions convex-analysis

Can the inverse of a function be the same as the original function?

algebra-precalculus functions