ImaginaryPartFn concept from the SUMO knowledge base

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ImaginaryPartFn	*documentation* (ImaginaryPartFn ?NUMBER) returns the imaginary part of ?NUMBER
	has axiom (=> (instance ?NUMBER ComplexNumber) (exists (?PART1 ?PART2) (and (equal ?PART1 (RealNumberFn ?NUMBER)) (equal ?PART2 (ImaginaryPartFn ?NUMBER)))))
	has domain1 ComplexNumber
	has range ImaginaryNumber
	*is an instance* of** UnaryFunction
BinaryRelation	*is first domain* of** DomainFn
	*is first domain* of** equivalenceRelationOn
	*is first domain* of** inverse
	*is first domain* of** irreflexiveOn
	*is first domain* of** partialOrderingOn
	*is first domain* of** RangeFn
	*is first domain* of** reflexiveOn
	*is first domain* of** totalOrderingOn
	*is first domain* of** trichotomizingOn
	*is second domain* of** inverse
Function	*is first domain* of** AssignmentFn
	*is first domain* of** closedOn
	*is first domain* of** range
	*is first domain* of** rangeSubclass
Class	*is third domain* of** domain
Class	*is third domain* of** domainSubclass
Abstract	*is disjoint* from** Physical