KnowraReal-valued functionLinked fromLinked fromThe 6 pages that link to Real-valued function, each with the reason it gives.All 6Related 2Narrower topic 3Compared with 1Weierstrass functionNarrower topic: The classic construction maps real inputs to real outputs.Complex modulusNarrower topic: The modulus maps complex inputs to nonnegative real outputs.Schwarz reflection principleRelated: Real boundary values on a straight boundary are the classic reflection condition.Vector-valued functionCompared with: Unlike vector-valued functions, its output at each input has a single real component.Banach–Stone theoremRelated: In the real version, the isometry may include a point-dependent sign as well as a change of variables.Function of a real variableNarrower topic: This broader class allows non-real or abstract inputs while retaining real outputs.