# What is a variation in calculus of variations?

## What is a variation in calculus of variations?

The calculus of variations is a field of mathematical analysis that uses variations, which are small changes in functions and functionals, to find maxima and minima of functionals: mappings from a set of functions to the real numbers. Many important problems involve functions of several variables.

Is calculus of variations important?

Originally Answered: Why does the calculus of variations play in important role in materials science? Calculus of variations is used to find minima and maxima of functions and functionals. Minima and Maxima of functions and functionals are used as the basis of many theories of optimizations.

What is the second variation?

From Encyclopedia of Mathematics. A special case of the n-th variation of a functional (see also Gâteaux variation), generalizing the concept of the second derivative of a function of several variables. It is used in the calculus of variations.

### Is calculus of variations hard?

Its is difficult to solve Partial differential equations, as there does not exist any method to tackle this problem in general. So, here comes Calculus of variation into the play. The idea is derived from elementry calculus, where we have a function, and probably we minimise the function.

Who found the calculus of variations?

Modern interest in the calculus of variations began in 1696 when Johann Bernoulli of Switzerland proposed a brachistochrone (“least-time”) problem as a challenge to his peers. Suppose that a thin wire in the shape of a curve joins two points at different elevations.

What is the difference between variation and differentiation?

variation (delta) is simply the change in a dependent variable due to a change in an independent variable (=delta y) while differentiation is the variation divided by a the change in the independent variable in a small range (=dy/dx).

## What branch of math is variation?

calculus of variations, branch of mathematics concerned with the problem of finding a function for which the value of a certain integral is either the largest or the smallest possible.

How do you find the first variation of a functional?

1. We can calculate this by going back to Equation 5 and computing its first variation: dF=F[y+δy]−F[y]. Start by computing F[y+δy]:
2. From Equation 10, we know that in the limit δy→0 so we can drop the last term.
3. By inspection, we can see Equation 11 resembles Equation 5, thus our functional derivative is δFδy(x)=2y(x).

Who invented variations in math?

Johann Bernoulli
Modern interest in the calculus of variations began in 1696 when Johann Bernoulli of Switzerland proposed a brachistochrone (“least-time”) problem as a challenge to his peers. Suppose that a thin wire in the shape of a curve joins two points at different elevations.

### What are the different kinds of variation in math?

Examples of types of variation include direct, inverse, joint, and combined variation. What Is Direct Variation? In direct variation, as one variable is multiplied by a constant and increases, another variable (the quotient) also increases.