Math

https://www.mccme.ru/

http://mathhelpplanet.com/viewforum.php?f=18

http://mathhelpplanet.com

Forecasting, R

https://otexts.com/fpp2/

TimeSeries

https://habr.com/ru/post/553658/

https://www.youtube.com/watch?v=u433nrxdf5k&t=2695s

https://studme.org/41015/ekonomika/nestatsionarnye_protsessy_privedenie_statsionarnomu_vidu

TimeSeries

https://habr.com/ru/post/553658/

SImpson, C#

https://codereview.stackexchange.com/questions/240207/simpsons-method-for-numerically-computing-the-integration-of-a-function

CDF

https://en.wikipedia.org/wiki/Cumulative_distribution_function

Numerical, Derivatives

https://codetown.ru/matlab/chislennoe-differencirovanie/

https://ru.wikipedia.org/wiki/%D0%A7%D0%B8%D1%81%D0%BB%D0%B5%D0%BD%D0%BD%D0%BE%D0%B5_%D0%B4%D0%B8%D1%84%D1%84%D0%B5%D1%80%D0%B5%D0%BD%D1%86%D0%B8%D1%80%D0%BE%D0%B2%D0%B0%D0%BD%D0%B8%D0%B5

http://qilab.phys.msu.ru/people/zadkov/teaching/seminar1/semnumer1.pdf

http://aco.ifmo.ru/el_books/numerical_methods/lectures/glava1.html

https://kpfu.ru/staff_files/F_1163013414/8_Chislennoe_differencirovanie.pdf

http://qilab.phys.msu.ru/people/zadkov/teaching/seminar1/semnumer1.pdf