U+2202 "∂" Partial Differential Unicode Character

U+2202 "∂" Partial Differential is a mathematical symbol known as the partial derivative operator, often called "del" or "curly d." It is used in calculus and multivariable analysis to denote the derivative of a function with respect to one of several variables while the others are held constant. This symbol, which resembles a stylized lowercase delta with a rounded top, is distinct from the Greek letter delta or the Latin letter d. It was introduced by the mathematician Adrien-Marie Legendre and popularized by Carl Gustav Jacob Jacobi. In Unicode, it occupies the code point U+2202 within the Mathematical Operators block.