Strip by: David Morgan-Mar
T-Rex: T-Rex solves a partial differential equation!
T-Rex: f(Du, u, x) = 0 where u = u(x)
T-Rex: And x is a vector of arbitrary dimension and Du is a matrix of partial derivatives.
T-Rex: First we find F such that F′(Du, u, x) ≈ f(Du, u, x)
Utahraptor: Isn't that harder than just solving f(Du, u, x) = 0 in the first place?
T-Rex: Well sure... but that's
T-Rex: NO FUN!
The author writes:
Utahraptor interrupted T-Rex's line of thought:
First we find F such that F′(Du, u, x) ≈ f(Du, u, x), and solve F(Du, u, x) = any constant value. Then simply differentiate F to find an approximate form for f.
Which is obviously more fun.