5 citations · 14 across the 12 of their papers we have counts for
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math.GM2018★ 1 cited
Derivatives of flat functions
Hiroki Kodama, Kazuo Masuda, Yoshihiko Mitsumatsu
We remark that there is no smooth function on which is flat at such that the derivative of any order is positive on . Moreover, the n…
math.DG2018★ 1 cited
Geometry and dynamics of Engel structures
Yoshihiko Mitsumatsu
The aim of this paper is to extend basic understanding of Engel structures through developing geometric constructions which are canonical to a certain degree and the dynamics of Ca…