5 ms·
As nice as it is, integers are not a field (i.e. most of them don't have multiplicative inverses, or 1/n usually isn't integral). Another good writeup: http://
by enedil 9y ago
As nice as it is, integers are not a field (i.e. most of them don't have multiplicative inverses, or 1/n usually isn't integral).
Another good writeup:
http://andrea.corbellini.name/2015/05/17/elliptic-curve-cryptography-a-gentle-introduction/ http://andrea.corbellini.name/2015/05/17/elliptic-curve-cryp...
- widdma 9y agoTrue, perhaps the author meant rationals.
- ecesena 9y agoIt's usually integers modulo p (p prime), which is a field. Edit: but yes, the OP writes "integers (Z) are a field", which is wrong. Integers form a ring.
- sixbrx 9y agoCame here to see if anyone noticed this. You can actually make a field of Z using a bijection to the rationals Q, which do exist. But then you aren't using the standard operations, but using the ones inherited from the particular mapping to Q.
- internetman55 9y agoI think integers mod p (p prime) is a field