solution is incorrect
Not really, we need to determine the first non-zero element in each column, not row.
Sums with Excluded Digits
Find the palindrome
Return elements unique to either input
Dimensions of a rectangle
Matrix with different incremental runs
Remove from a 2-D matrix all the rows that contain at least one element less than or equal to 4
A quadrant matrix
Matrix which contains the values of an other matrix A at the given locations.
Create a matrix X, where each column is a shifted copy of the vector v
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