Mathematics – Algebraic Geometry
Scientific paper
2011-03-10
Mathematics
Algebraic Geometry
24 pages
Scientific paper
We give lower bounds on the number of effective divisors of degree $\leq g-1$ with respect to the number of places of certain degrees of an algebraic function field of genus $g$ defined over a finite field. We deduce lower bounds and asymptotics for the class number, depending mainly on the number of places of a certain degree. We give examples of towers of algebraic function fields having a large class number.
Ballet Stephane
Rolland Robert
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