Related Clues:
- 'Institutiones Calculi Integralis' writer
- Green activity
- Swiss calculus pioneer
- Introducer of the math symbol 'e'
- Swiss math giant
- Swiss math great
- Phil Mickelson's game
- With 9-Across, Tiger's equipment
- Game on the green
- Country-club game
- He introduced the symbol 'e' for natural logs
- This puzzle's theme—according to Twain, it's "a good walk spoiled"
- Go for a Masters?
- Great Swiss mathematician
- Calculus innovator Leonhard