Write a function that has the following property: f(f(x)) = -x for any numeric array x.
Note that there is no restriction on the output for f(x). How bizarre can you make it?
This one really surprised me.
Getting a little silly!
The Goldbach Conjecture, Part 2
How to find the position of an element in a vector without using the find function
sum of non-primes
Number of digits in an integer
Do Fast Fourier Transformation
Find vampire numbers
Multivariate polynomials - emulate symbolic form
Find all vampire fangs
Multivariate polynomials - sort monomials
Multivariate polynomials - overload multiplication
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