If for every city that AtoB airways flies into in Bland they supply a return ticket, then AtoB supply a pair of functions, FAtoB and FBtoA. We call FAtoB an injective function because it has a left inverse (a return ticket).
{"Image DocumentName": "If for every city that AtoB airways flies into in Bland they supply a return ticket, then AtoB supply a pair of functions, FAtoB and FBtoA. We call FAtoB an injective function because it has a left inverse (a return ticket).", "Image ImageDescription": "b4. a1. a2. a3. FAtoB. b1. b2. b3. FAtoB is the inverse of FBtoA. An injective function is one-to-one. If e is an identity element of (S,   ) and a   b = e, then a is called a left inverse of b and b is called a right inverse of a. Aland. Bland.", "Image XResolution": "37", "Image YResolution": "37", "Image ResolutionUnit": "Pixels/Centimeter", "Image Software": "SlidePlayer", "Image YCbCrPositioning": "Centered"}