SIGMAS NYT Crossword Clues
Date
Grid
Clue
Author
Editor
Sun, Jun 24, 2018
14A
Symbols in calculus
Timothy Polin
Shortz
Wed, Jan 30, 2008
31D
Summation signs
Peter A. Collins
Shortz
Fri, Nov 20, 1998
5D
Letters from Greece
Manny Nosowsky
Shortz