Hokkaido University of Science

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19942026

most citedMass Estimates of a Giant Planet in a Protoplanetary Disk from the Gap Structures

210 citations

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Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.

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math.DG2023★ 7 cited

Parallel and totally umbilical hypersurfaces of the four-dimensional Thurston geometry $Sol_{0}^{4}$

Marie D'haene, Jun-ichi Inoguchi, Joeri Van der Veken

We study hypersurfaces of the four-dimensional Thurston geometry $Sol_{0}^{4}$ , which is a Riemannian homogeneous space and a solvable Lie group. In particular, we give a full c…

math.DG2018

Cofrontals

Goo Ishikawa

In this paper we introduce the notion of cofrontal mappings, as the dual objects to frontal mappings, and study their basic local and global properties. Cofrontals are very special…

math.DG2018★ 3 cited

Geometric algebra and singularities of ruled and developable surfaces

Junki Tanaka, Toru Ohmoto

Any ruled surface in Euclidean 3-space is described as a curve of unit dual vectors in the algebra of dual quaternions (=the even Clifford algebra of type (0,3,1)). Combining this…

math.DG2015★ 5 cited

Projective classification of jets of surfaces in 3-space

Hiroaki Sano, Yutaro Kabata, Jorge Luiz Deolindo Silva +1

We present a local classification of smooth projective surfaces in 3-space via projective transformations in accordance with singularity types of central projections up to codimens…

math.DG2009★ 1 cited

Singularities of flat extensions from generic surfaces with boundaries