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1. Computing the cardinality of the lattice of characteristic subspaces.

Author

Mingueza, David, Eulàlia Montoro, M., and Roca, Alicia

Subjects
*SUBSPACES (Mathematics), *CARDINAL numbers, *LATTICE theory, *JORDAN matrix, *GENERATING functions, *COMBINATORIAL geometry
Abstract

We obtain the cardinality of the lattice of characteristic subspaces of a nilpotent Jordan matrix when the underlying field is G F ( 2 ) , the only field where the lattices of characteristic and hyperinvariant subspaces can be different. If the characteristic polynomial of the matrix splits in the field, the general case can be reduced to the nilpotent Jordan case. Results are complex and highly combinatorial, and include the design of an algorithm. [ABSTRACT FROM AUTHOR]

Published
2017
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