Tuesday, November 01, 2016

Wanderers 2016.11.1

At Wanderers, November 1, 2016

David Koski is here in town so it makes sense he would be speaking at Wanderers.  We have an established affinity for geometry.  We did the Mt. Tabor thing this morning, ascending to its summit.  That sounds strenuous but remember it's a tall hill.  He's from Minneapolis, not often in Portland, so I'm in tour guide mode, which I enjoy.

Yesterday we visited Cargo, a retail outlet specializing in oriental goods.  There's a large down stairs with lots of floor space.  Then we circled round through the code school (PDX Code Guild) to say hello to the Monday night Flying Circus crowd.  I had Glenn and Deke the Geek in tow, in addition to David.

Speaking of code schools, this coming Monday I'll start teaching again, my course in Python in forty hours.  That's like a radio show in some ways, or closed circuit television.  Small class size.

Glenn and David compared respected mnemonics over lunch.  They both do minimalist diagrams capturing some basic ratios and relationships. I'm talking about pure geometry, extending from surface tiling to space-filling.

For example the golden cuboid or "phi brick" has a good many embedded relationships and serves as a factory for tetrahedrons each using six of the seven edge lengths.  A brick with a 2nd root of phi edge also figures in.  David assembles shapes from an elementary set of tetrahedrons which he scales up and down in size.

I mistakenly thought the Rite, so named by Fuller, was not MITE-composed, whereas it's the 1/4 Rite, a Sommerville space-filling tetrahedron, that is not Mite-composed.  "Aristotle was right, remember the Mite" -- the shoptalk of which all-the-same tetrahedrons fill space (with no gaps).  Check Math World for more information.

David Koski