Subresultants and Reduced Polynomial Remainder Sequences
Journal of the ACM (JACM)
EUROSAM '84 Proceedings of the International Symposium on Symbolic and Algebraic Computation
A modular GCD algorithm over number fields presented with multiple extensions
Proceedings of the 2002 international symposium on Symbolic and algebraic computation
Algorithms for polynomial GCD computation over algebraic function fields
ISSAC '04 Proceedings of the 2004 international symposium on Symbolic and algebraic computation
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The defect of an algebraic number field (or, more correctly, of a presentation of the field) is the largest rational integer that divides the denominator of any algebraic integer in the field when written using that presentation. Knowing the defect, or estimating it accurately is extremely valuable in many algorithms, the factorization of polynomials over algebraic number fields being a prime example. We present a few results that are a move in the right direction.