I attended the annual meeting of Pennsylvania Interfaith Power and Light in Harrisburg yesterday.
Rashly, they voted me onto the board. (Still more rashly, the board then proposed that I serve as Treasurer - I guess they must have supposed that being a math professor had something to do with the ability to do arithmetic accurately).
Keynote speakers were Fletcher Harper from GreenFaith and Richard Alley from Penn State. Alley is PSU's Evan Pugh Professor of Geosciences. (The Evan Pugh title is Penn State's highest honor - there are only 23 Evan Pugh Professors currently active across the whole university, out of a faculty of over 2000.) He is also the host of the PBS series Earth - The Operators Manual.
Here is a telling video clip from Alley's talk (courtesy of Jon Brockopp).
A Bicategory of Decorated Cospans - My students are trying to piece together general theory of networks, inspired by many examples. A good general theory should clarify and unify these exampl...
2 weeks ago