12 citations · 13 across the 4 of their papers we have counts for
5 papers · 1 filter
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 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…