Comment by peter_d_sherman

Related:

https://www.reddit.com/r/learnmath/comments/av8w5v/help_me_u...

>"Basically we can see every function in R^n as the level surface of some higher dimensional function in R^n+1"

[...]

>"A level surface is just some constant value of any function."

Also related:

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