NMinimize

NMinimize[f,x] searches for a global minimum in f numerically with respect to x.

NMinimize[f,{x,y,…}] searches for a global minimum in f numerically with respect to x, y, ….

NMinimize[{f,cons},{x,y,…}] searches for a global minimum in f numerically subject to the constraints cons. 

NMinimize[…,x∈rdom] constrains x to be in the region or domain rdom.

Please visit the official Wolfram Language Reference for more details and examples on core symbols.