feat(stdlib): Reimplement Number.gamma
and Number.factorial
#2182
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This pr re-implements
Number.gamma
andNumber.factorial
.This pr is blocked on #2181 as the tests will fail due to the precision issue when computing
sin(pi * z) / gamma(1 - z)
I think we should also open an issue to port the c version here in the future as this approximation provides decent accuracy but we accumulate some extra error due to the error in other approximation functions such as
sin
, this should also make things a little faster.This pr closes: #1478