x = [ 2 -1 -3]
y = [1.5 -1]
Most nonzero elements in row
Solve the Sudoku Row
Test if two numbers have the same digits
select the primes of a vector
Min of a Matrix
Switch matrix to a column vector
find the maximum element of the matrix
calculate linear convolution two vectors
Calculate the derivative of a polynomial
generate a matrix of Legendre polynomials
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