Create the vector lin:
(the integers from 1 to 20)
Make every other value in it negative to get:
There is something a little unsatisfying about solving a 'Problem' in which there is no input, and (thus) only one output case required, and where furthermore a valid solution is shown in the Test Suite. This seems to apply to all/most 'Problems' tagged "sttbdp1".
Column norms of a matrix
Back to basics 23 - Triangular matrix
Whether the input is vector?
Replace Vector Elements
Insert zeros into vector
04 - Scalar Equations 3
02 - Vector Variables 1
06 - Matrix Equations 2
07 - Common functions and indexing 6
05 - Vector Equations 3
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