solution is incorrect
Not really, we need to determine the first non-zero element in each column, not row.
Least common multiple of many numbers
First N Perfect Squares
Back to basics 7 - Equal NaNs
Multiply by 3
Matrix which contains the values of an other matrix A at the given locations.
vectorization in N
Create a matrix X, where each column is a shifted copy of the vector v
A quadrant matrix
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