- IsDoublyEven
- IsDualComputable
- IsDynkinDigraph
- IsEasySnAn
- IsEdgeCapacitated
- IsEdgeLabelled
- IsEdgeTransitive
- IsEdgeWeighted
- IsEffective
- IsEichler
- IsEisenstein
- IsEisensteinSeries
- IsElementaryAbelian
- IsEllipticCurve
- IsEllipticWeierstrass
- IsEmbedded
- IsEmpty
- IsEmptySimpleQuotientProcess
- IsEmptyWord
- IsEndomorphism
- IsEof
- IsEquationOrder
- IsEquidistant
- IsEquitable
- IsEquivalent
- IsEquivalent(G,a,b) : GrpPSL2, SpcHypElt, SpcHypElt -> BoolElt, GrpPSL2Elt
- IsEquivalent(g,h,G) : GrpPSL2Elt, GrpPSL2Elt, GrpPSL2 -> BoolElt
- IsEquivalent(model1, model2) : ModelG1, ModelG1 -> BoolElt, TransG1
- IsEquivalent(f, g) : QuadBinElt, QuadBinElt -> BoolElt, AlgMatElt
- IsEquivalent(f,g) : RngUPolElt, RngUPolElt -> BoolElt
- IsEquivalent(P,Q) : TorPol,TorPol -> BoolElt, Map, TorLatElt
- IsIsomorphic(C, D: parameters) : Code, Code -> BoolElt, Map
- IsEtale
- Isetseq
- Isetset
- IsEuclideanDomain
- IsEuclideanRing
- IsEulerian
V2.28, 13 July 2023