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!
Is this matrix orthogonal?
Number of Horns on a unicorn!
Weave two vectors into one
Area of a Square
Matlab Basics - Convert a row vector to a column vector
Multivariate polynomials - convert monomial form to array
Multivariate polynomials - overload multiplication
Fangs of a vampire number
Outer product of multiple vectors
Product of two multivariate polynomials
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