Specific Element Count
Create a square matrix of multiples
Implement simple rotation cypher
Back to basics - mean of corner elements of a matrix
Create a vector
Form a square matrix from four square sub-matrices
Find cosine between two given vectors u and v.
Calculate the sum of elements of n*n Hilbert matrix.
Find hen's weight.
Opposite task convert string hexadecimal numbers array into array of decimal numbers .
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