## The 16 most Important Geometric Objects: Overview with Formulas and Properties

Illustrated overview of all geometric solids with important properties as well as formulas for areas, volumes and other quantities.

Illustrated overview of all geometric solids with important properties as well as formulas for areas, volumes and other quantities.

Learn to calculate the gradient of a function using the Nabla operator and to determine the directional derivative.

Learn Nabla operator to represent and calculate gradient (grad), divergence (div), rotation (curl) and other operators.

Here you will learn about the delta function and its properties, which you can use for example to describe an electric point charge.

Here you will learn what a Fourier series is, how it can be calculated, and the role of Fourier coefficients and basis functions.

Here you will learn about Levi-Civita symbol; how it is defined and how it can be used to write and prove scalar triple product and cross product.

Here you learn everything about Kronecker-Delta! Including 4 calculation rules with Einstein's summation convention, typical mistakes and more.

Learn what differential equations are, what types there are (ordinary, partial, linear, homogeneous), and what boundary and initial conditions are good for.

Learn how to solve first order homogeneous differential equations using the separation of variables (SoV) method. With example for the decay law.

Separation of variables (product approach) is suitable for converting partial differential equations (PDE's) into ordinary differential equations and then solving them with other methods.