Online calculator: Lagrange polynomial calculator
https://planetcalc.com/8692This online calculator builds Lagrange polynomial for a given set of points, shows a step-by-step solution and plots Lagrange polynomial as well as its basis polynomials on a chart. Also, it can interpolate additional points, if given I wrote this calculator to be able to verify solutions for Lagrange's interpolation problems.
Lagrange multiplier - Wikipedia
https://en.wikipedia.org/wiki/Lagrange_multiplierthe lagrange multiplier theorem states that at any local maxima (or minima) of the function evaluated under the equality constraints, if constraint qualification applies (explained below), then the gradient of the function (at that point) can be expressed as a linear combination of the gradients of the constraints (at that point), with the …