M.Sc. in Mathematics.

I love watching the night sky.

Notes for myself: Linearity in "unknown parameters"(linear regression): https://stats.stackexchange.com/questions/92065/why-is-polynomial-regression-considered-a-special-case-of-multiple-linear-regres

optimization:

Negative definite: https://math.stackexchange.com/a/1419313/600799

Real analysis-

https://math.stackexchange.com/a/915867/600799

https://math.stackexchange.com/a/3010873/600799

https://math.stackexchange.com/a/1673491/600799

https://math.stackexchange.com/a/2164692/600799