Wiktionary

∾

See also: Appendix:Variations of "="
∾ U+223E, ∾
INVERTED LAZY S
← ∽
[U+223D] 		Mathematical Operators ∿ →
[U+223F]

Translingual

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Description

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An inverted lazy S.

Symbol

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∾

  1. (mathematics) logical negation[1]

Usage notes

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Resembles manuscript variants of the infinity sign, ∞ (e.g. in Euler's notebooks).

References

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  1. ^ Kurt Gödel, "Über formal unentscheidbare Sätze der Principia Mathematica und verwandter Systeme I" (1931), DOI 10.1007/BF01700692, page 177
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