https://math.stackexchange.com/questions/3680708/what-is-the-difference-between-the-jacobian-hessian-and-the-gradient https://carmencincotti.com/2022-08-15/t

https://math.stackexchange.com/questions/3680708/what-is-the-difference-between-the-jacobian-hessian-and-the-gradient https://carmencincotti.com/2022-08-15/the-jacobian-vs-the-hessian-vs-the-gradient/