internal tangent of two circlesinternal tangentsinternal vertexinternally tangent circlesinternational standards organizationinterpolateinterpolationinterpolation formulainterpolation methodinterpolation search methodinterpolation spaceinterpolation theoreminterpretinterpretationinterpretation in the frequency senseinterpretation through kkt conditionsinterpreterinterquartileinterquartile rangeinterruptinterruptionintersectintersectingintersecting linesintersectionintersection methodintersection of eventsintersection of familyintersection of planesintersection of relationsintersection of setsintersection of subgruopsintersection of two linesintersection of two surfaceintersection of two surfacesintersection pointinterspaceinterspatialintersticeinterstitialintervalinterval connectednessinterval coveringinterval estimateinterval estimationinterval functioninterval halvinginterval linear programminginterval mappinginterval mapping theorem