Approximate equation of a surface/curves to be used as an objective function

functions optimization approximation surfaces

Solution 1:

Calculate values of your function on a $3 \times 3$ Grid, and then use 2D quadratic Lagrange interpolation.

Related

Is it true that $\left(-\frac{1}{64}\right)^{-\frac 43}=256$? [duplicate]
Definition of amenable group
The preorder of countable order types
Show that $ \sum_{r=1}^{n-1}\binom{n-2}{r-1}r^{r-1}(n-r)^{n-r-2}= n^{n-2} $
Show that a metric space has uncountably many disjoint dense subsets if every ball is uncountable.
An identity involving integrals of the form $\int_{0}^{\alpha} \arctan (\sqrt{5}\tan\theta) \, d\theta$.
What underlies formal logic (or math, generally)?
Fully faithful and essentially surjective is an equivalence
Finding the max flow of an undirected graph with Ford-Fulkerson
Prerequisites for Differential Galois theory
Evaluating $\int_0^{2\pi}\frac{dt}{\sqrt[4]{P(\cos t,\sin t)}}$
Integral $\int_{0}^{\pi/2} \arctan \left(2\tan^2 x\right) \mathrm{d}x$