4 ms·
Nit > The distribution must be smooth (this method doesn’t work for discrete parameters), but it need not be analytically differentiable 'Smooth' and 'analyti
by sn6uv 10y ago
Nit
> The distribution must be smooth (this method doesn’t work for discrete parameters), but it need not be analytically differentiable
'Smooth' and 'analytic' both have basic technical meanings in the context of differentiability [1], [2].
Glossing over the assumptions in this way is quite misleading
[1] https://en.m.wikipedia.org/wiki/Smoothness https://en.m.wikipedia.org/wiki/Smoothness
[2] https://en.m.wikipedia.org/wiki/Analytic_function https://en.m.wikipedia.org/wiki/Analytic_function
- mr_pink 10y agoAnalytically differentiable (being able to derive a formula for the derivative) is not the same thing at all as analytic functions of complex analysis (which are infinitely differentiable, etc). If anything, the term "analytic function" seems more of a misnomer to me, but "analytically differentiable" is used in its proper sense in the article.