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.

Each cell of this polychoron has K3+ symmetry, with 6 hexagonal and 4 tetragonal faces.

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