Find the arity of any function
47027
Function that counts the number of arguments of other functions
7755
Question on entire function
80361
Any program or trick to find the definition of a variable?
127643
Using function compositions to determine variable values
116410
How to return the value of Automatic when it is used in a Mathematica function?
103019
Find all functoins $f: \mathbb R \rightarrow \mathbb R$ such that $\forall x,y \in \mathbb R f(xy+f(x))=xf(y)+f(x)$
122690
Constructing functions with variable number of output arguments
17406
Determine all the extrema of a function subject to a non-linear constraint.
87031
How to define a function of non-symbol
77980
How to check the real analyticity of a function?
26262
Is there an easy way to see associativity or non-associativity from an operation's table?
21391
Proving Functions are Surjective
1727
How to determine function name from inside a function
65615
Pure function with attributes of arbitrary number of arguments: Is it possible?
124523
Finding an Inverse Function and Composition of Functions?
77180
In pure functional languages, is there an algorithm to get the inverse function?
47611
Integers and integer functions