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add yule simon cdf
Description
This issue is a feature proposal.
As a continuation of https://github.com/stan-dev/math/issues/3219, we will add cdf for yule simon distribution.
Expected Output
real yule_simon_cdf(ints n, reals alpha)
Checklist
This will require a yule_simon_cdf with analytical derivatives.
- [ ] cdf
- [ ] test of cdf
Current Version:
v5.1.0