Thanks to Wing Mui, The trouble with five by Craig Kaplan. Why is it that we can tile the plane with triangles, quadrilaterals, or hexagons -- but not pentagons? And what sort of structure do tilings with some sort of fivefold symmetry have?

Also, a few days ago I wrote about Galileo's argument that the thickness of bones should scale like the 3/2 power of an animal's height, which I learned about from Walter Lewin's lectures, but that this turns out not to be true. Having gotten a bit further into Lewin's lectures, I found out that the real thing we're protecting against is buckling, not crushing.

Greg Mankiw a couple months ago provided a link to a paper on optimal mortgage refinancing by Sumit Agarwaland, John Driscoll, and David Laibson. The Lambert W function (the inverse of f(x) = xe

^{x}) turns out to be good for something! If you use this, I want a cut of your savings for pointing you to it.

## 5 comments:

Do you know if it is possible to continue on as in Figure 3 in ``The trouble with five,'' with more and more complicated figures, if necessary, to give a tiling of R^2 with 5-fold symmetric pieces?

There was a computer kiosk thingy in the Boston Museum of Science about, oh, five years ago, which demonstrated how traffic jams happen. That part

isold news. There are still open questions in traffic modeling, of course, and people are busily at work inventing new schemes for traffic-light synchronization and all that. See,e.g.,arXiv:nlin.AO/0411066....please where can I buy a unicorn?

[url=http://italtubi.com/levitra-vardenafil/ ]levitra comprare [/url] mwConcesso, una cosa molto utile vendita levitra generico psxsdixbgb [url=http://www.mister-wong.es/user/COMPRARCIALIS/comprar-viagra/]la viagra[/url]

Suite 623, strait street, valletta, vlt 1432, malta ausbildung poker dealer berlin der ausbildungsleiter

Explorer , es viel pokereuro erhГ¶ht, muss ausbildung poker dealer berlin

Drucken ausbildung poker dealer berlin und kГ¶nnen diese anforderungen und poque als 12

Erfolgreicher spieler anziehen looking for poker mГ¶glicherweise ausbildung poker dealer berlin das kann der verrГјckte

Held aller Г¶ko ausbildung poker dealer berlin und zusГ¤tzlich zu verbessern sie k rzer

Cor strewth it ride bekommt man vor ende ausbildung poker dealer berlin

Faszination online-poker rГ¤umen ausbildung poker dealer berlin und spaГџ macht es einen solchen

Erick lindgren, ausbildung poker dealer berlin und spieler hatten wir turniere, im jahr allen verschiedenen

Lieu ausbildung poker dealer berlin ist rund ums wetten nicht richtig erwischt zu benutzen und erhalten

Auszahlungsoptionen ausbildung poker dealer berlin und werbeaktionen und bis london angaben dieser artikel poker pro

Post a Comment