Goursat, 
.J.B. 古尔萨（1858—1936）
- Welch window
- welk
- welk sheaf
- Welland, W.
- well-attainable boundary point
- well-behaved
- well-behaved function
- well-behaved problem
- well-bounded operator
- well-conditioned
- well-defined
- well-determined
- well-distinguishable objects
- well-distributed sequence
- well-formed
- well-formed formula
- well-formed net
- well-founded
- well-founded induction
- well-founded order
- well-founded ordered set
- well-founded partial order
- well-founded recursion
- well-founded relation
- well-founded structure