12 citations · 13 across the 4 of their papers we have counts for
6 papers
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…
Regular submodules of torsion modules over a discrete valuation domain
Pudji Astuti, Harald K. Wimmer
A submodule of a p-primary module of bounded order is known to be regular if and have simultaneous bases. In this paper we derive necessary and sufficient condition…
Hyperinvariant subspaces of locally nilpotent linear transformations
Pudji Astuti, Harald K. Wimmer
A subspace of a vector space over a field is hyperinvariant with respect to an endomorphism of if it is invariant for all endomorphisms of that commute with …
Linear transformations with characteristic subspaces that are not hyperinvariant
Pudji Astuti, Harald K. Wimmer
If is an endomorphism of a finite dimensional vector space over a field then an invariant subspace is called hyperinvariant (respectively, characteristic) i…
Minimal Prime Ideals of Ore Extensions over Commutative Dedekind Domains
Amir Kamal Amir, Pudji Astuti, Intan Muchtadi-Alamsyah
Let R = D[x;σ;δ] be an Ore extension over a commutative Dedekind domain D, where σis an automorphism on D. In the case δ= 0 Marubayashi et. al. already investigated the class of mi…