A 33yr old model of fractal octahedra stack limiting to a cube #mathbun #fractals

#mathbun

Two compounds -- uncolored they are very strange #mathbun

Two compounds -- uncolored they are very strange #mathbun

Had to hit more than one big box store for this Hilbert curve #mathbun #fractals

Had to hit more than one big box store for this Hilbert curve #mathbun #fractals

One of the quarter groups, 8^o, Intl # 198 #mathbun

One of the quarter groups, 8^o, Intl # 198 #mathbun

This one takes quite a bit of explanation #mathbun

A detail #mathbun

The lamplighter group as a limit of groups: L1 is drawn on ideal squares in H2. L2, shown here sits on ideal cubes in H3. Rolling these up by the next relator for L3 gives a graph on ideal hypercubes in H4, etc, Limiting to the #lamplightergroup #symmetry #mathbun

L1 rolls up into L2, just as L3 rolls into ideal hypercubes, etc, limiting to the #lamplightergroup #mathbun #geometricgrouptheory

Paper Scissors Tape youtu.be/6lxOBbE6elE launches with a quick guide to Tooti Tooti, the 2021 Rosenthal Prize winner. Lots more to come!

Another Tooti Tooti video up! Make your own symmetrical designs from a plain envelope. youtube.com/watch?v=5MihLM…

Ok, if you think about, you can see why the upright hand in the back is also a right hand— this is the “mirror paradox”, that you’re not reversed in a pair of mirrors meeting in a right angle. So why is the ipad backwards?

Within an icosascope:

Finally have a website up to enjoy, chaimgoodmanstrauss.com with new posts daily. Please check it out!

put some groovy images up at chaimgoodmanstrauss.com

Try your hand at identifying some symmetry types at chaimgoodmanstrauss.com What types are these?

Lore and links of the Math Factor podcast and radio segment (2004-2012), up at chaimgoodmanstrauss.com