SECANTS
South of England Computational and Algorithmic Number Theory Seminars

Seventh Meeting
Saturday 6 December 1997
Bristol

Lecture Theatre 2, School of Mathematics, University Walk, Bristol

Only the front door (that is on University Walk) will be open (the back door will be closed and alarmed as in Oxford). Parking is possible in University Walk but note it is one way with the Maths building near the end, approach via Woodland Road (there are maps on the University web site). It is about 25 minute walk from Temple Meads Station (NOT Parkway) or bus to Queen's Road. For lunch there are pubs and a sandwich bar fairly close on St. Michael's Hill.

"The Discrete Logarithm Problem"

12.00-12.50 J. E. Cremona (Exeter)

"Higher Descent on Elliptic Curves"

13.00-14.00 LUNCH

14.00-15.00 R. Schoof (Universita Tor Vergata, Rome)

"Computing class groups in towers of cyclotomic fields"

Abstract: We explain an algorithm to compute certain limits of class groups in cyclotomic towers. It is based on computations with cyclotomic units. As an application we verify Greenberg's ``$\lambda=0$''-conjecture in several cases.

15.15-16.05 J. F. McKee

"Pisot Numbers from Trees"

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SECANTS South of England Computational and Algorithmic Number Theory Seminars

Seventh Meeting Saturday 6 December 1997 Bristol

SECANTS
South of England Computational and Algorithmic Number Theory Seminars

Seventh Meeting
Saturday 6 December 1997
Bristol