Picard, C.
. 皮卡（1856—1941）
- well-ordering principle
- well-ordering relation
- well-ordering set
- well-ordering structure
- well-ordering theorem
- well-poised
- well-poised series
- well-posed
- well-posed Cauchy problem
- well-posed definition
- well-posed difference problem
- well-posedness
- well-posedness class
- well-posed problem
- well-posed solution
- well-powered category
- well-quasi-order
- well-quasi-ordered set
- well-quasi-ordering
- well-semimodule
- well-separated eigenvalue
- Wells, R.O., Jr.
- Wellstein, J.
- Wells, W.
- Wendroff, B.