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DM
2008
129views more  DM 2008»
14 years 17 days ago
On association schemes all elements of which have valency 1 or 2
In the present note, we investigate schemes S in which each element s satisfies ns 2 and nss = 2. We show that such a scheme is schurian. More precisely, we show that it is isomor...
Mikhail E. Muzychuk, Paul-Hermann Zieschang
AAECC
1993
Springer
170views Algorithms» more  AAECC 1993»
14 years 4 months ago
Exponential Sums as Discrete Fourier Transform with Invariant Phase Functions
We give estimates for exponential sums over finite fields in several variables. We study the case where the phase is either quadratic or more generally invariant under the action ...
Gilles Lachaud
ISSAC
1998
Springer
106views Mathematics» more  ISSAC 1998»
14 years 4 months ago
Computing Normal Subgroups
This note presents a new algorithm for the computation of the set of normal subgroups of a finite group. It is based on lifting via homomorphic images.
Alexander Hulpke