- the Lallement representation
- the Lasalle invariance principle
- the law of thermal equilibrium
- the least number operator
- the least number principle
- the least root operator
- the least search operator
- the left end
- thematic cartography
- thematic map
- thematic mapper
- the maximum idempotent-separating congruence
- the method of impredicative definition
- the method of inverse scattering problem
- the method of inverse scattering transformation
- 闭凸l子群
- 闭凸函数
- 闭凸锥包
- 闭包
- 闭包
- 闭包交换公理
- 闭包公理
- 闭包复形
- 闭包的非标准特征
- 闭包算子