Possible Clues:

• Mathematician from London campus in Muslim festival
• Big name in geometry circles
• With his help, could one figure out this hidden clue? I would
• Prompt about cover for maths book
• Greek philosopher
• It's a geometrical clue I'd make for him
• Does the cold, hard, cockney nut turn up here?
• Great Greek of geometry
• Greek father of geometry
• Cryptic clue (1 down) for old mathematician