No need for finding / calculating any phi or angle here. Just simpler than it is written.
Project Euler: Problem 9, Pythagorean numbers
Create a Multiplication table matrix...
Multiples of a Number in a Given Range
04 - Scalar Equations 2
Find the "ordinary" or Euclidean distance between A and Z
Is this matrix orthogonal?
Flip the main diagonal of a matrix
Find the nearest integer
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