x = [1 2; 3 4]
y = 4
Check to see if a Sudoku Puzzle is Solved
Whether the input is vector?
Sum the Digits of a Number
Sum the 'edge' values of a matrix
find the roots of a quadratic equation
Switch matrix to a column vector
generate a matrix of Legendre polynomials
Weave two vectors into one
Find the minimum element of the matrix
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