On the Edge of Eclipses and P=NP
17 August 2017 | 9:24 pm

A topical look at Norbert Blum’s paper and wider thoughts. Cropped from source Thales of Miletus may—or may not—have accurately predicted one or more total solar eclipses in the years 585 through 581 BCE. Today we discuss the nature of science viewed from mathematics and computing. A serious claim of by Norbert Blum has shot […]

Modeling Reality
9 August 2017 | 4:56 pm

A surprising theorem about differential equations Composite of src1, src2. Olivier Bournez and Amaury Pouly have proved an interesting theorem about modeling physical systems. They presented their paper at ICALP 2017 last month in Warsaw. Today Ken and I wish to explain their theorem and its possible connections to complexity theory. Of course as theorists […]

Maryam Mirzakhani, 1977–2017
28 July 2017 | 2:12 pm

Including debt to Marina Ratner, 1938-2017 By joint permission of Assad Binakhahi, artist, and Radio Farda (source)      Maryam Mirzakhani won the Fields Medal in 2014. We and the whole community are grieving after losing her to breast cancer two weeks ago. She made several breakthroughs in the geometric understanding of dynamical systems. Who knows what […]

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