15-4 gyrochoron

The 15-4 gyrochoron, also known as the triswirl 15, is a convex isochoric polychoron and member of the gyrochoron family with 15 paratetratruncated rhombic prisms as cells. Together with its dual, it is the fourth in an infinite family of triangular dihedral swirlchora.

Each cell of this polychoron has BC2+×A1+ symmetry, with 6 hexagonal and 4 tetragonal faces.

compared to other gyrochora with 15 cells, this polychoron has doubled symmetry, because 15 = 42-1.