#random walks

Very proud of this one. Here’s the blurb:

Ring polymers, where the ends of the polymer are joined to form a closed loop, are an interesting class of polymeric materials with novel physical and chemical properties. Very recently, a few laboratories have started to synthesize “topological” polymers, which have structures much more complicated than a single loop. These materials promise to be extremely useful in a variety of industrial and scientific applications. However, they are more difficult to model. This paper extends the traditional mathematical model of a ring polymer (Gaussian random polygons) to handle topological polymers of arbitrary complexity. It provides an alternate explanation for the James–Guth–Flory theory of elastic networks and is straightforward to implement computationally and conceptually simple to understand.

first posted in facebook october 29, 2019

jeff perrott -- "black lit" (2019)

"random walks in endless fields" ... jeff perrott

"i am invisible, understand, simply because people refuse to see me" ... ralph ellison

"no more water, the fire next time" ... james baldwin

"you been gone too long, sula" ... toni morrison

"i think it pisses god off if you walk by the color purple in a field somewhere and don't notice it" ... alice walker

"the law ... is made by the rich people so that the poor people can't get ahead” ... walter mosley

"in the end, your past is not my past and your truth is not my truth and your solution ... is not my solution” ... zadie smith

"for all those that have to fight for the respect that everyone else is given without question" ... n.k. jemisin