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Article 11 — Appendix A.32sign — signum functionCategory. Mathematics. Abstract. Signum: definition, graph and properties. References. This article is a part of scientific calculator LiL, scientific calculator LiX, scientific calculator LiLc and scientific calculator LiXc products. 1. DefinitionSignum function is defined as sign(x) ≡ −1, for x < 0;sign(0) ≡ 0; sign(x) ≡ 1, for x > 0. 2. GraphSignum function is defined everywhere on real axis — so, its domain is (−∞, +∞). Function graph is depicted below — fig. 1. Fig. 1. Graph of the signum function y = signx.Function codomain is limited to the set of values {−1, 0, 1}. 3. SupportSignum function sign is supported in: Signum function of the complex argument sign is supported in:
4. How to useTo calculate signum of the number:
To calculate signum of the current result:
To calculate signum of the number x in memory:



