@ Scipy lecture notes, Edition 2017.1
https://www.scipy-lectures.org/_downloads/ScipyLectures-simple.pdf
p50
np.random: random numbers (Mersenne Twister PRNG):
PRNGとは何か?
Pseudorandom number generator
https://en.wikipedia.org/wiki/Pseudorandom_number_generator
A pseudorandom number generator (PRNG), also known as a deterministic random bit generator (DRBG)
別名としてDRBGともいうらしい。
deterministic (決定論的)なので、stocastic(確率論的）と対照的なのだろう。
https://en.wikipedia.org/wiki/Stochastic_process