## Are the spherical harmonics orthogonal and normalized?

In mathematics and physical science, spherical harmonics are special functions defined on the surface of a sphere. These functions form an orthogonal system, and are thus basic to the expansion of a general function on the sphere as alluded to above.

### How do you rotate spherical harmonics?

We can rotate spherical harmonics with a linear transformation. Each band is rotated independently….We could:

- Rotate around Z and rotate 90 degrees with a closed form solution.
- Use a Taylor series to approximate the rotation function (as in some PRT work).

**Are spherical harmonics real?**

Real spherical harmonics (RSH) are obtained by combining complex conjugate functions associated to opposite values of . RSH are the most adequate basis functions for calculations in which atomic symmetry is important since they can be directly related to the irreducible representations of the subgroups of [Blanco1997].

**How do spheres rotate?**

In geometry, the word rotation is often short for rotation about an axis. For a sphere to spin without changing it’s location, the axis for rotation must pass through the center of the sphere. The axis can be straight up and down, left and right, in and out, or any mixture of these three axes.

## How many axis of rotation does a sphere have?

The sphere itself can only rotate around one axis at a time.

### How many axis does a sphere have?

Difference Between a Sphere and a Circle

Circle | Sphere |
---|---|

A circle is a two-dimensional or 2d shape | A sphere is a three-dimensional or 3d shape |

A circle is defined by two axes, the x-axis and the y-axis. | A sphere is defined by three axes, x-axis, y-axis and z-axis |

**What do spherical harmonics tell us?**

Spherical harmonics are a set of functions used to represent functions on the surface of the sphere S 2 S^2 S2. They are a higher-dimensional analogy of Fourier series, which form a complete basis for the set of periodic functions of a single variable (functions on the circle. S^1).