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Delta is the initial letter of the Greek word διαφορά diaphorá, "difference". ... In mathematics, the symbol ≜ (delta over equals) is occasionally used to ...
Greek letters are used in mathematics, science, engineering, and other areas where mathematical notation is used as symbols for constants, special functions, and also conventionally for variables representing certain quantities. In these contexts, the capital letters and the small letters represent distinct and unrelated entities.
The symbol was introduced originally in 1770 by Nicolas de Condorcet, who used it for a partial differential, and adopted for the partial derivative by Adrien-Marie Legendre in 1786. [3] It represents a specialized cursive type of the letter d , just as the integral sign originates as a specialized type of a long s (first used in print by ...
A mathematical symbol is a figure or a combination of figures that is used to represent a mathematical object, an action on mathematical objects, a relation between mathematical objects, or for structuring the other symbols that occur in a formula. As formulas are entirely constituted with symbols of various types, many symbols are needed for ...
Δ, a difference of state between two before and after state schemas in the Z notation, the first Feigenbaum constant; Delta connective, a unary connective in t-norm fuzzy logics; Delta method for approximating the distribution of a function; Difference operator (Δ) Dirac delta function (δ function)
The symbols Δt and ΔT (spoken as "delta T") are commonly used in a variety of contexts. Time. ΔT (timekeeping) the difference between two time scales, ...
Typographical symbols and punctuation marks are marks and symbols used in typography with a variety of purposes such as to help with legibility and accessibility, or to identify special cases. This list gives those most commonly encountered with Latin script. For a far more comprehensive list of symbols and signs, see List of Unicode characters.
Symbol Name Meaning SI unit of measure nabla dot the divergence operator often pronounced "del dot" per meter (m −1) nabla cross the curl operator often pronounced "del cross" per meter (m −1) nabla: delta (differential operator)