The upper-case letter Δ can be used to denote
- Change of any variable quantity, in mathematics and the sciences (More specifically, the difference operator); for example, in
- , the average change of y per unit x, i.e. the change of y over the change of x
- The Laplace operator:
- The discriminant of a polynomial equation, especially the quadratic equation:
- A macroscopic change in the value of a variable in mathematics or science
- Uncertainty in a physical variable as seen in for instance the uncertainty principle
- An interval of possible values for a given quantity for instance across a sample
- 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)
- That an associated locant number represents the location of a covalent bond in an organic compound, the position of which is variant between isomeric forms
- In chemistry, it is often used to represent the addition of heat in a reaction.
- In legal shorthand, it represents a defendant
- In the financial markets, it is one of the Greeks that describes the rate of change of an option price for a given change in the underlying benchmark
- It is the symbol of the Greek inventor and architect Daedalus
- Signifies a major seventh chord in jazz music notation.
- In genetics, it can stand for a gene deletion, e.g. the CCR5-Δ32 a deletion of the CCR5 at the 32nd base pair segment
- The American Dental Association cites it (together with omicron for "odont") as the symbol of dentistry.
Read more about this topic: Delta (letter)
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