3 papers
math.DG2026
Prolongations of -distributions by singular curves
Goo Ishikawa, Yoshinori Machida
A subbundle of rank 3 in the tangent bundle over a 6-dimensional manifold is called a (3, 6)-distribution if its local sections generate the whole tangent bundle by taking their Li…
math.DG2025
Prolongation of -Distribution of Type by Singular Curves
Goo Ishikawa, Yoshinori Machida
Cartan gives the model of -distribution with the exceptional simple Lie algebra as its symmetry algebra in his paper (1893), which is published one year before his t…
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…