# Electrodynamics/Notation

This book uses a consistent notation for its equations. We will describe the symbols we use here, as well as other ways that those concepts are notated in other books.

- : Gradient operator
^{2}: Laplacian operator- : d'Alembertian operator
*A*: Area**A**: Magnetic potential field**B**: Magnetic field*c*: Speed of light**D**:**E**: Electric Field**F**_{e}: Electric force vector**F**_{m}: Magnetic force vector**F**: Field Tensor**G**: Magnetic Field Tensor**H**:*I*: Current, in amperes*j*: Electric current**j**: Electric current density*k*: Coulomb's Constant*K*: Magnetic Constant*l*: length**L**: Lorentz transformation matrix**M**: Magnetization field**n**: Normal vector- φ: Electric potential function
*r*: Scalar distance*r*, θ,*z*: Cylindrical coordinates*r*, θ, ρ: Spherical coordinates**r**: Distance vector**R**: Rotation matrix- σ: Charge density
**T**_{E}: Electric stress tensor**T**_{M}: Magnetic stress tensor*V*: Volume*x*,*y*,*z*: Cartesian Coordinates