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66
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JSC
2006
95views more  JSC 2006»
14 years 10 months ago
Polyhedral conditions for the nonexistence of the MLE for hierarchical log-linear models
We provide a polyhedral description of the conditions for the existence of the maximum likelihood estimate (MLE) for a hierarchical log-linear model. The MLE exists if and only if...
Nicholas Eriksson, Stephen E. Fienberg, Alessandro...
58
Voted
JSC
2006
64views more  JSC 2006»
14 years 10 months ago
Computing the support of local cohomology modules
For a polynomial ring R = k[x1, ..., xn], we present a method to compute the characteristic cycle of the localization Rf for any nonzero polynomial f R that avoids a direct comput...
Josep Àlvarez Montaner, Anton Leykin
75
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JSC
2000
99views more  JSC 2000»
14 years 10 months ago
Computing Orbits of Minimal Parabolic k-subgroups Acting on Symmetric k-varieties
The orbits of a minimal parabolic k-subgroup acting on a symmetric k-variety are essential to the study of symmetric k-varieties and their representations. This paper gives an algo...
Aloysius G. Helminck
87
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JSC
2000
69views more  JSC 2000»
14 years 10 months ago
Generic Polynomials with Few Parameters
We call a polynomial g(t1, . . . , tm, X) over a field K generic for a group G if it has Galois group G as a polynomial in X, and if every Galois field extension N/L with K L and...
Gregor Kemper, Elena Mattig
98
Voted
JSC
2002
84views more  JSC 2002»
14 years 10 months ago
A Constructive Algebraic Hierarchy in Coq
We describe a framework of algebraic structures in the proof assistant Coq. We have developed this framework as part of the FTA project in Nijmegen, in which a constructive proof ...
Herman Geuvers, Randy Pollack, Freek Wiedijk, Jan ...