2 papers
math.FA2019
A notion of optimal packings of subspaces with mixed-rank and solutions
Peter G. Casazza, John I. Haas, Joshua Stueck +1
We resolve a longstanding open problem by reformulating the Grassmannian fusion frames to the case of mixed dimensions and show that this satisfies the proper properties for the pr…
math.FA2018
Constructions and properties of optimally spread subspace packings via symmetric and affine block designs and mutually unbiased bases
Peter G. Casazza, John I. Haas, Joshua Stueck +1
We continue the study of optimal chordal packings, with emphasis on packing subspaces of dimension greater than one. Following a principle outlined in a previous work, where the au…