Reference

The Rosetta Stone

30 symbols you will meet in physics, biology and AI papers. Some are operators: they do something, like a function or a loop. Most Greek letters are naming conventions, variables whose meaning depends on the field. Telling the two apart is half of reading an equation.

30 of 30 symbols

Summation (capital sigma)Operator Product (capital pi)Operator IntegralOperator DerivativeOperator Partial derivativeOperator Gradient operator (nabla, del)Operator Delta (change / difference)Notation ThetaNaming convention LambdaNaming convention AlphaNaming convention BetaNaming convention EtaNaming convention MuNaming convention Sigma (lowercase)Naming convention PsiNaming convention InfinityNotation Proportional toNotation Approximately equalNotation For allNotation There existsNotation Element of (set membership)Notation Expectation (expected value)Operator Conditional probabilityNotation LogarithmFunction ExponentialFunction TransposeOperator Dot product (or multiplication)Operator Norm (length of a vector)Operator Argmin (the input that minimises)Operator Loss function (calligraphic L)Naming convention