| Michael D. Fried (University of California, Irvine) |
| Extension of constants series and towers of exceptional covers |
| - - Salle Kampé de Fériet - M2 |
| Site internet de l'orateur |
| Résumé : |
Let F_q be the finite field of order q. We use a simple characterization of exceptional covers (of projective nonsingular curves) over F_q: A cover maps one-one on F_{q^t} points for infty-ly many t. Lenstra suggested there may be an Exceptional (cover) Tower. We construct and use it to organize progress and unsolved
problems on genus 0 exceptional covers. |
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