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2. Delta (letter) - Wikipedia

   en.wikipedia.org/wiki/Delta_(letter)

   Delta (/ ˈdɛltə /; [1] uppercase Δ, lowercase δ; Greek: δέλτα, délta, [ˈðelta]) [2] is the fourth letter of the Greek alphabet. In the system of Greek numerals it has a value of 4. It was derived from the Phoenician letter dalet 𐤃. [3] Letters that come from delta include Latin D and Cyrillic Д.

3. Greek letters used in mathematics, science, and engineering

   en.wikipedia.org/wiki/Greek_letters_used_in...

   t. e. 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.

4. Glossary of mathematical symbols - Wikipedia

   en.wikipedia.org/wiki/Glossary_of_mathematical...

   Glossary of mathematical symbols. 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 ...

5. Delta method - Wikipedia

   en.wikipedia.org/wiki/Delta_method

   Delta method. In statistics, the delta method is a method of deriving the asymptotic distribution of a random variable. It is applicable when the random variable being considered can be defined as a differentiable function of a random variable which is asymptotically Gaussian.

6. Differential (mathematics) - Wikipedia

   en.wikipedia.org/wiki/Differential_(mathematics)

   Introduction. The term differential is used nonrigorously in calculus to refer to an infinitesimal ("infinitely small") change in some varying quantity. For example, if x is a variable, then a change in the value of x is often denoted Δ x (pronounced delta x). The differential dx represents an infinitely small change in the variable x.

7. Delta - Wikipedia

   en.wikipedia.org/wiki/Delta

   Mathematics. Δ, a difference of state between two before and after state schemas in the Z notation. δ {\displaystyle \delta } , the first Feigenbaum constant. Delta connective, a unary connective in t-norm fuzzy logics. Delta method for approximating the distribution of a function.