FIG. 2: A two dimensional representation of the 3D neckpinch geometry of Angenent and Knopf (continuum on top, and discrete on bottom). In 3D the continuum cross-sections are 3-spheres and not circles, and in our discrete model the cross sections are icosahedrons and not hexagons. The 3D cells are triangle-based frustum blocks as opposed to the trapezoids depicted in the bottom of the figure. Here the variable ac measures the proper distance from the equator, and s is the length of the icosahedron edges

FIG. 2: A two dimensional representation of the 3D neckpinch geometry of Angenent and Knopf (continuum on top, and
discrete on bottom). In 3D the continuum cross-sections are 3-spheres and not circles, and in our discrete model the cross
sections are icosahedrons and not hexagons. The 3D cells are triangle-based frustum blocks as opposed to the trapezoids
depicted in the bottom of the figure. Here the variable ac measures the proper distance from the equator, and s is the length
of the icosahedron edges