Umbilic Torus NC, silicon bronze, antique verde patina, 27"x27"x9", is a continuous torus surface textured with a surface filling curve. Inspired by the 2x2 invertible real matrix group acting on binary cubic forms, this work is typical of Helaman Ferguson's art embodying essential truth and mathematical theorems, which he takes from the spiritual realm of pure reason and clothes with forms accessible to us all.