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Extra resources for Algebraic Geometry — Open Problems: Proceedings of the Conference Held in Ravello, May 31 – June 5, 1982

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Vari~t~ [I-M] Toute - avoir conduisent B(X) : de X d a n s u n e , E B(X) tel ~ue X ° * s o i t ~n i s o m o r p h i s m e . I1 en d ~d u i t ainsi que automorphismes aux fibres Th~or~me IS] criminante nel pour : terminer Soit C v~rifie X~S un fibr~ fibres alors tels 9. en c o n i q u e s une courbe exemples e_~t X e s t est dans X irrationnel elliptique). avec Y = ~3) du g r o u p e s'appliquent en c o n i q u e s , Alors fibration, des points de X ( p r e n a n t structure des avec : P o u r S = ~ 2 , ce r ~ s u l t a t en ~ c l a t a n t la que ces m~thodes 14K S + C[ ~ .

G6n6rique Un c a n d i d a t de d e g r 6 de v a r i 6 t 6 0 pour en coniques sugg6r6 contenant unirationnelle une ? non unirationnel. par Enriques, droite avec est l'hypersurface multiplicit~ (d-2), d ~ 5. BIBLIOGRAPHIE ["A-M] A. ANDREOTTI e t integrals (1967), on Soc. [B1] D. MUMFORD varieties [C-G] : Ann. relations Sc. Norm. Some e l e m e n t a r y not for Sup. abelian Pisa rational, examples Proc. of unira- London Math. de P r y m e t 41 (1977), Surfaces : jacobiennes interm~diaires, and the Schottky problem, 149-196.

The c l a s s i c a l intermediate §5. Some o p e n q u e s t i o n s . results. of a conic bundle. of A2(X) . Jacobian of a c o n i c b u n d l e . References. INTRODUCTION In this paper we s t a t e some bundles study X on n o n s i n g u l a r describe, with negative the C o n f e r e n c e A reason for this of We m a i n l y of cycles equivalent of to zero J(X) . v e r s i o n of a talk on June conic in the c l a s s i f i c a t i o n dimension. "Open P r o b l e m s (Italy), concerning the g r o u p A2(X) Jacobian is an e x p a n d e d Ravello S.

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