# Math

## It’s nice to learn… ## Symmetries

There is a maxim in physics (rather in science), a necessary basic axiom and is that under a reproducible experiment it must give the same value wherever (place) and whenever […] ## Double integrals

We all know, and if you do not know or remember, for that I am, that because of the integrals is to, in principle, calculate the area supported by a […] ## Vector field and scalar field

There is a very common confusion between a scalar field and vector field, mainly because of the definitions of these. Thus we call the vector field, mathematically speaking, a function […] ## Method of least squares

Some of you will ask, how are these universal constants that physicists put into the formulas? Simple, they are extracted based on experimentation. When one formulates a formula to explain […] ## Optimization problems with constraints or Lagrange functions

Long ago I talked about the problem of differentiation with restrictions and now I want to emphasize an application, the optimization with restrictions. Let us imagine a function of two […]

## Constrait parcial derivatives

Today I want to comment on a small and rapid mathematical method regarding the derivation (partial) of functions. We, the majority, are accustomed to seeing the radius of change of […] ## Lagrange multiplier

In my series of explaining a few functions of several variables, their analysis, which is included in the differential geometry, today I want to talk about something, in itself, little […] ## Normal vector

Yesterday, if you remember, I told you that it was the tangential (unitary) vector to a curve or path, so today I will tell you how to calculate and that […]