- #1
haki
- 161
- 0
Hi,
I have no problems with recognising a bijective function -> one-to-one mapping e.g. x^3 is bijective wheras x^2 is not.
But how do you tell weather a function is injective or surjective? I was reading various "math" stuff on this but it has left me only puzzled. Can somebody explain injective and surjective in plain english. How do you tell weather a function is injective or surjective or none?
I have no problems with recognising a bijective function -> one-to-one mapping e.g. x^3 is bijective wheras x^2 is not.
But how do you tell weather a function is injective or surjective? I was reading various "math" stuff on this but it has left me only puzzled. Can somebody explain injective and surjective in plain english. How do you tell weather a function is injective or surjective or none?