- #1
mikeeey
- 57
- 0
Hello every one .
A relation ( is a subset of the cartesian product between Xand Y) in math between two sets has spatial
types 1-left unique ( injective)
2- right unique ( functional )
3- left total
4- right total (surjective)
May question is 1- a function ( map ) is a relation that is
a- right unique
b- left total
I'm asking if there is a relation ( not function ) that is ( left total) and ( right total ) then what would is be called ? In the sense that the two set are infinite set is there and example
My second question if we have two group structures and we want a relation between them , why does always the relation is function ( homomorphism ) ? Is there a relation that is left total and right total between the two structures ?
Thanks
A relation ( is a subset of the cartesian product between Xand Y) in math between two sets has spatial
types 1-left unique ( injective)
2- right unique ( functional )
3- left total
4- right total (surjective)
May question is 1- a function ( map ) is a relation that is
a- right unique
b- left total
I'm asking if there is a relation ( not function ) that is ( left total) and ( right total ) then what would is be called ? In the sense that the two set are infinite set is there and example
My second question if we have two group structures and we want a relation between them , why does always the relation is function ( homomorphism ) ? Is there a relation that is left total and right total between the two structures ?
Thanks