I recently finished the second cycle of the clinical trial I’m participating in. I’ll have a bone marrow biopsy on Tuesday and about a week later the results will be the first indication of how well I’m responding to the treatment, which will probably guide future treatment. I’ve mostly tolerated it well—at times feeling crappy, and I seem to have some very slight neuropathy issues recently in my finger tips and toes, but mostly feeling pretty well. (Though lots of blood transfusions recently too.)

Besides that I’ve been working on more curved crease origami, along with trying to model it in 3D.

In mathematics, a developable surface is a surface that can be flattened out into a plane. Since origami starts with a flat sheet of paper, and paper doesn’t squash or stretch, the results of origami must too be a developable surface. Ruled surfaces are surfaces that can be constructed with straight lines. The hyperbolic paraboloid (also called a hypar) is a ruled surface, but not developable. The cylinder (without end caps) is both developable and ruled.

Folding concentric circles into a piece of paper seems to be both a developable surface (or at least a close approximation of one), and an approximation of a hypar. It makes me wonder if there is some kind of limit or something we could move towards, maybe as the distance between the concentric circular creases goes towards zero.