Cartier divisor: Difference between revisions
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Latest revision as of 16:18, 12 May 2008
Definition
Symbol-free definition
A Cartier divisor in a commutative unital ring is an invertible fractional ideal of the ring. The set of Cartier divisors form a group under ideal multiplication.
Related notions
- Weil divisor: There is a natural homomorphism from the group of Weil divisors to the group of Cartier divisors