> So do natural numbers in France always include the zero?
Sure !!! Peano rulez !!!
That's makes me wondering if sage really improves me mathematical creativity !
Let me see some of my recent work:
Ticket #5256: coherent handling of trivial matrices
# Check that the empty 0x0 matrix is it's own inverse with det=1.
# Check that the empty 0x3 and 3x0 matrices are not invertible and that
# computing the detemininant raise the proper exception.
Ticket #5314: The empty permutations exists !
sage: Permutations(0).list()
[[]]
And now I'm wondering is 0 is even good enough to be a number !
Next step: a patch for the empty set !
I have to stop right now before ending as a mad logician :-)
Cheers,
Florent
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