### - i -

- imaginaryPart() : Number
- internalFormula() : UserFunction
- intValue() : Number
- isActive() : ExpressionItem
- isApproximate() : ExpressionItem , Number
- isApproximateType() : Number
- isChildOf() : Unit , AliasUnit
- isCurrency() : Unit
- isExpression() : KnownVariable
- isInfinite() : Number
- isInfinity() : Number
- isKnown() : KnownVariable , UnknownVariable , Variable
- isMinusInfinity() : Number
- isParentOf() : AliasUnit , Unit
- isPlusInfinity() : Number
- isRationalPolynomial() : MathStructure
- isSIUnit() : Unit
- isUserModified() : DataObject