Category Archives: merch

supply issues

Posted on Wednesday, 2020 March 11 by Anton

I’ve had a number of mugs printed by Zazzle, and most of them came out gorgeous; but last summer I was peeved enough by a delivery cock-up to want to take my business elsewhere. Recently I got around to doing … Continue reading →

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I ain’t Zazzling any more

Posted on Wednesday, 2019 July 24 by Anton

You probably haven’t noticed the absence of a link in the upper left, “buy 2D printed objects”, which went to my catalogue on Zazzle: shirts, mugs, posters.

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a token creation

Posted on Sunday, 2019 March 10 by Anton

I got a notice from Zazzle that if I don’t post at least one new product in every fifteen months they’re going to charge me a Non-Contributing Account Fee. So here’s one. I can spin more variations on this theme … Continue reading →

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a poster

Posted on Saturday, 2017 September 09 by Anton

Sometimes I search my blog for this picture and scratch my head in puzzlement that it’s not here, before remembering that I posted it on Google Plus back when I used that. So here it is. Stephen Guerin (the shaven … Continue reading →

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Klein bagel, mark N

Posted on Wednesday, 2017 February 08 by Anton

I’ve had other designs made in steel but not this one. (The sintering leaves the steel highly porous, so liquid bronze is brought in by capillary action to fill it; the result is about three parts steel to two parts … Continue reading →

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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 →

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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) )