# Inverse

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*in Wiktionary, the free dictionary.***inverse****Inverse** or **invert** may refer to:

## Science and mathematics[edit]

- Inverse (logic), a type of conditional sentence which is an immediate inference made from another conditional sentence
- Additive inverse (negation), the inverse of a number that, when added to the original number, yields zero
- Compositional inverse, a function that "reverses" another function
- Inverse element
- Inverse function, a function that "reverses" another function
- Generalized inverse, a matrix that has some properties of the inverse matrix but not necessarily all of them

- Multiplicative inverse (reciprocal), a number which when multiplied by a given number yields the multiplicative identity, 1
- Inverse matrix of an Invertible matrix

## Other uses[edit]

- Invert level, the base interior level of a pipe, trench or tunnel
*Inverse*(website), an online magazine- An outdated term for an LGBT person; see Sexual inversion (sexology)