interval measurementinterval of confidenceinterval of constancyinterval of convergenceinterval of indeterminacyinterval of inedterminacyinterval of integrationinterval of ratio measurementinterval of variationinterval or scaleinterval scaleinterval subsetintervalicinterviewerinterviewer biasintointo mappingintraintra blockintra block effectsintra class correlationintraclassintraclusterintracluster correlationintransitiveintransitive groupintransitive permutationintransitive relationintrinsicintrinsic equationintrinsic equationsintrinsic equations of a space curveintrinsic geometryintrinsic propertiesintrinsic properties of a curveintroduceintroductionintroductoryintuitionintuitionalismintuitionastic mathematicsintuitionismintuitionisticintuitionistic logicintuitionistic mathematicsintuitiveintuitive principle of abstractionintuitivelyinvalidinvalidity