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math.DS2016
The totally nonnegative part of the finite Toda lattice via a reducible rational curve
Shinsuke Iwao, Kyo Nishiyama, Noboru Ogawa
A totally nonnegative matrix is a real-valued matrix whose minors are all nonnegative. In this paper, we concern with the totally nonnegative structure of the finite Toda lattice,…
math.CV2016★ 6 cited
Local criteria for non embeddability of Levi-flat manifolds
Takayuki Koike, Noboru Ogawa
We give local criteria for smooth non-embeddablity of Levi-flat manifolds. For this purpose, we pose an analogue of Ueda theory on the neighborhood structure of hypersurfaces in co…