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The nabla is a triangular symbol resembling an inverted Greek delta: [1] or ∇. The name comes, by reason of the symbol's shape, from the Hellenistic Greek word νάβλα for a Phoenician harp, [2] [3] and was suggested by the encyclopedist William Robertson Smith in an 1870 letter to Peter Guthrie Tait.
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 character ∂ (Unicode: U+2202) is a stylized cursive d mainly used as a mathematical symbol, usually to denote a partial derivative such as / (read as "the partial derivative of z with respect to x").
The symmetric function equation of the Riemann zeta function in mathematics, also known as the Riemann xi function; A universal set in set theory; A number used in the remainder term of Taylor's theorem that falls between the limits a and b
Math and science [ edit ] In statistics , the term chi-squared or χ 2 {\displaystyle \chi ^{2}} has various uses , including the chi-squared distribution , the chi-squared test , and chi-squared target model
Archaic form of Phi. Phi (/ f aɪ /; [1] uppercase Φ, lowercase φ or ϕ; Ancient Greek: ϕεῖ pheî; Modern Greek: φι fi) is the twenty-first letter of the Greek alphabet.. In Archaic and Classical Greek (c. 9th to 4th century BC), it represented an aspirated voiceless bilabial plosive ([pʰ]), which was the origin of its usual romanization as ph .
A macroscopic change in the value of a variable in mathematics or science. Uncertainty in a physical variable as seen in the uncertainty principle. An interval of possible values for a given quantity. Any of the delta particles in particle physics. The determinant of the matrix of coefficients of a set of linear equations (see Cramer's rule).
Rarely used in modern mathematics without a horizontal bar delimiting the width of its argument (see the next item). For example, √2. √ (radical symbol) 1. Denotes square root and is read as the square root of. For example, +. 2. With an integer greater than 2 as a left superscript, denotes an n th root.