109 citations
- University of TsukubaJP13 papers
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Showing 2018Show all
3 papers · 1 filter
math.PR2018
Stability condition of a two-dimensional QBD process and its application to estimation of efficiency for two-queue models
Toshihisa Ozawa
In order to analyze stability of a two-queue model, we consider a two-dimensional quasi-birth-and-death process (2d-QBD process), denoted by $\{\boldsymbol{Y}(t)\}=\{((L_1(t),L_2(t…
math.GT2018
Neighborhood equivalence for multibranched surfaces in 3-manifolds
Kai Ishihara, Yuya Koda, Makoto Ozawa +1
A multibranched surface is a 2-dimensional polyhedron without vertices. We introduce moves for multibranched surfaces embedded in a 3-manifold, which connect any two multibranched…
math.GT2018
Two more proofs that the Kinoshita graph is knotted
Makoto Ozawa, Scott A. Taylor
The Kinoshita graph is a particular embedding in the 3-sphere of a graph with three edges, two vertices and no loops. It has the remarkable property that although the removal of an…