invertible in a sentence

Examples

1. :First question : can an odd function be invertible at all?
2. So, of the two, only odd functions can be invertible.
3. To be invertible a function must be both an injection and a surjection.
4. This function is not invertible for reasons discussed above.
5. Injections are " reversible " but not always invertible.
6. An operator may be injective, even bounded below, but not invertible.
7. The relation between the coordinates is then given by the invertible transformation functions:
8. Tornado was also invertible, allowing it to continue running even when flipped.
9. Groups are monoids for which every morphism is invertible.
10. That would still guarantee no collisions ( because block ciphers are invertible ).