Category Archives: sciences

elusive avoidance

Posted on Monday, 2015 January 26 by Anton

I’ve been designing printable models of the Lawson-Klein surface w = cos(u) cos(2v) x = cos(u) sin(2v) y = sin(u) cos(v) z = sin(u) sin(v) As you can plainly see, this figure lives in S3 (positively curved 3-space), so stereographic … Continue reading →

Posted in mathematics, merch | 2 Comments

hidden dragon

Posted on Monday, 2014 November 24 by Anton

For years I’ve occasionally had a mysterious itch at my lowest left rib, nothing showing on the skin. Now it has spread rightward at the same altitude, making me think: could this be mild shingles?

Posted in me!me!me!, medicine | Leave a comment

unapologetically one-sided

Posted on Saturday, 2014 June 07 by Anton

My newest design on Shapeways is a model of the Lawson-Klein surface : a stereographic projection of ( cos(u)cos(2v), cos(u)sin(2v), sin(u)cos(v), sin(u)sin(v) )

Posted in mathematics, merch | 2 Comments

naming is hard

Posted on Saturday, 2014 May 10 by Anton

I often have trouble giving meaningful concise names to variables in the programs I write, perhaps because, until I reach for the keyboard, my thinking is largely nonverbal. I suspect that it would be less of a problem for someone … Continue reading →

Posted in curve-fitting, neep-neep | 4 Comments

relax

Posted on Tuesday, 2014 April 01 by Anton

This curve-fitting thingy is one of several projects on which I’ve made progress in rare fits over several years. It ran into two big snags. I haven’t found how to determine which gridpoints are within the pen-width of a blending … Continue reading →

Posted in curve-fitting | 2 Comments

models of the 35 smallest fullerenes

Posted on Monday, 2014 February 24 by Anton

I noticed that Shapeways had 13 models of the roundest of the fullerenes (one of the 1812 forms of C60), but none of the less regular forms; so I made some. Each of the white pieces has mirror symmetry; the … Continue reading →

Posted in merch, sciences | 4 Comments

FCC cube generator

Posted on Saturday, 2014 February 01 by Anton

I could have used this a week ago. def fccstack(): newlimit = 0 while True: oldlimit = newlimit newlimit += 1 # extend z for x in xrange(oldlimit): for y in xrange((x+oldlimit)&1, oldlimit, 2): yield (x,y,oldlimit) # extend y for … Continue reading →

Posted in mathematics, neep-neep | Leave a comment