add ExponentialFamily and Dirichlet probability distribution#38445

Merged

iclementine merged 3 commits intoPaddlePaddle:developfrom cxxly:distribution-expfamily

Dec 30, 2021

+822-6

Commits on Dec 27, 2021

extend Distribution baseclass for supporting multivariant distribution and prob method
cxxly
committed
add ExponentialFamily base class and entropy using Bregman divergence
cxxly
committed
add dirichlet probability distribution
cxxly
committed