12 citations · 13 across the 6 of their papers we have counts for
5 papers · 2 filters
Homomorphisms of modules associated with polynomial matrices with infinite elementary divisors
Pudji Astuti, Harald K. Wimmer
If the inverse of a nonsingular polynomial matrix has a polynomial part then one can associate with a module over the ring of proper rational functions, which is related to…
A class of marked invariant subspaces with an application to algebraic Riccati equations
Pudji Astuti, Harald K. Wimmer
Invariant subspaces of a matrix are considered which are obtained by truncation of a Jordan basis of a generalized eigenspace of . We characterize those subspaces which are…
Hyperinvariant, characteristic and marked subspaces
Pudji Astuti, Harald K. Wimmer
Let be a finite dimensional vector space over a field and a -endomorphism of . In this paper we study three types of -invariant subspaces, namely hyperinvarian…
Characteristic and hyperinvariant subspaces over the field GF(2)
Pudji Astuti, Harald K. Wimmer
Let be an endomorphism of a vector space over a field . An -invariant subspace is called hyperinvariant (respectively characteristic) if is invari…
Characteristic subspaces and hyperinvariant frames
Pudji Astuti, Harald K. Wimmer
Let be an endomorphism of a finite dimensional vector space over a field . An -invariant subspace of is called hyperinvariant (respectively characteristic) if it…