How is it possible that the same matrix x in test 2 and test3 give different results? I guess you copy in the test 3 the wrong matrix?
Impossible to understand the tests
Too much variation on how many digits of precision you want
Now should be ok. Sorry but it is my first problem published.
For any question write me.
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Sums with Excluded Digits
Product of elements in row
Center of mass
Distance of the centroids of the balls
frame of the matrix
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