Sketchy Polytopes

Obituaries: Alexander Grothendieck (1928–2014)

More will be told of this story as his voluminous writings from the hinterland are being read. But between 1945 and 1970 he published mathematics of unparalleled sweep and power, conveying escalations of abstraction to the solution of concrete problems, and this is the part we wish to appreciate.

[Alexander Grothendieck 1928–2014GΓΆdel’s Lost Letter and P=NP](