# Is Laplace equation a harmonic function?

## Is Laplace equation a harmonic function?

A solution of Laplace’s equation is called a “harmonic function” (for reasons explained below). Since the Laplace equation is linear, the sum of two or more individual solutions is also a solution.

**What is eigenfunction expansion?**

The final eigenfunction expansion form of the solution is constructed from the superposition of the products of the time-dependent solution and the preceding x- and y-dependent eigenfunction. From: Partial Differential Equations & Boundary Value Problems with Maple (Second Edition), 2009.

### What is Laplacian operator and harmonic function?

If the Laplacian of a function is zero everywhere, it is called Harmonic. Harmonic functions arise all the time in physics, capturing a certain notion of “stability”, whenever one point in space is influenced by its neighbors.

**What is harmonic function formula?**

A function u(x, y) is known as harmonic function when it is twice continuously differentiable and also satisfies the below partial differential equation, i.e., the Laplace equation: ∇2u = uxx + uyy = 0.

#### Which is harmonic function?

harmonic function, mathematical function of two variables having the property that its value at any point is equal to the average of its values along any circle around that point, provided the function is defined within the circle.

**What is Laplace equation?**

Laplace’s equation states that the sum of the second-order partial derivatives of R, the unknown function, with respect to the Cartesian coordinates, equals zero: A-B-C, 1-2-3… If you consider that counting numbers is like reciting the alphabet, test how fluent you are in the language of mathematics in this quiz.

## What is eigen equation?

The time-independent Schrödinger equation in quantum mechanics is an eigenvalue equation, with A the Hamiltonian operator H, ψ a wave function and λ = E the energy of the state represented by ψ.

**Why are harmonic functions called harmonic?**

The descriptor “harmonic” in the name harmonic function originates from a point on a taut string which is undergoing harmonic motion. The solution to the differential equation for this type of motion can be written in terms of sines and cosines, functions which are thus referred to as harmonics.