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2. Actuarial notation - Wikipedia

   en.wikipedia.org/wiki/Actuarial_notation

   Actuarial notation is a shorthand method to allow actuaries to record mathematical formulas that deal with interest rates and life tables. Traditional notation uses a halo system, where symbols are placed as superscript or subscript before or after the main letter. Example notation using the halo system can be seen below.

3. Levi-Civita symbol - Wikipedia

   en.wikipedia.org/wiki/Levi-Civita_symbol

   Levi-Civita symbol. In mathematics, particularly in linear algebra, tensor analysis, and differential geometry, the Levi-Civita symbol or Levi-Civita epsilon represents a collection of numbers defined from the sign of a permutation of the natural numbers 1, 2, ..., n, for some positive integer n. It is named after the Italian mathematician and ...

4. Glossary of mathematical symbols - Wikipedia

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

   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 ...

5. Glossary of set theory - Wikipedia

   en.wikipedia.org/wiki/Glossary_of_set_theory

   1. A delta number is an ordinal of the form ω ω α 2. A limit ordinal Δ (Greek capital delta, not to be confused with a triangle ∆) 1. A set of formulas in the Lévy hierarchy 2. A delta system ε An epsilon number, an ordinal with ω ε =ε η 1. The order type of the rational numbers 2. An eta set, a type of ordered set 3.

6. Bra–ket notation - Wikipedia

   en.wikipedia.org/wiki/Bra–ket_notation

   In quantum mechanics, bra–ket notation is used ubiquitously to denote quantum states. The notation uses angle brackets, and , and a vertical bar , to construct "bras" and "kets". A ket is of the form . Mathematically it denotes a vector, , in an abstract (complex) vector space , and physically it represents a state of some quantum system.

7. Mathematical operators and symbols in Unicode - Wikipedia

   en.wikipedia.org/wiki/Mathematical_operators_and...

   Mathematical operators and symbols are in multiple Unicode blocks. Some of these blocks are dedicated to, or primarily contain, mathematical characters while others are a mix of mathematical and non-mathematical characters. This article covers all Unicode characters with a derived property of "Math". [2][3]