Calculate the number of horns on a unicorn!
And I'm talking about a unicorn with not more than one horn on it!
It depends on the exact definition. Maybe the unicorn had a serious accident, is it still a unicorn.....?
Energy of a photon
Get the length of a given vector
Given a 4x4 matrix, swap the two middle columns
Solving Quadratic Equations (Version 1)
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