Some narrative  notes in memory of a
Bowling Green State University math professor
who reportedly died at 72 on Feb. 13— 

That date in this journal and Green Fields.

See also Nine is a Vine.

Those who prefer mathematics to narrative may 
also prefer to read, instead of the notes above,
some material on the dead professor's specialty,
Diophantine equations. Recommended:
Mordell on Lang and Lang on Mordell as well as
Lang's article titled

"Mordell's Review, Siegel's Letter to Mordell,
Diophantine Geometry, and 20th Century Mathematics."

Some background —