22 citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
3 papers
Partitions of the polytope of Doubly Substochastic Matrices
Lei Cao, Zhi Chen
In this paper, we provide three different ways to partition the polytope of doubly substochastic matrices into subpolytopes via the prescribed row and column sums, the sum of all e…
Symmetric, Hankel-symmetric, and Centrosymmetric Doubly Stochastic Matrices
Richard R. Brualdi, Lei Cao
We investigate convex polytopes of doubly stochastic matrices having special structures: symmetric, Hankel symmetric, centrosymmetric, and both symmetric and Hankel symmetric. We d…
A New Sub-Period-Minimum CV with Partial Hydrogen Depletion and Evidence of Spiral Disk Structure
C. Littlefield, P. Garnavich, A. Applegate +6
We present time-resolved spectroscopy and photometry of CSS 120422:111127+571239 (= SBS1108+574), a recently discovered SU UMa-type dwarf nova whose 55-minute orbital period is wel…