Borel Determinacy Theorem
Let 
be a tree defined on a metric over a set of paths such that the distance between paths 
and 
is 
, where 
is the number of nodes shared by and . Let 
be a Borel set of paths in the topology induced by this metric. Supposetwo players play a game by choosing a path down the tree, so that they alternate and each time choose an immediate successor ofthe previously chosen point. The first player wins if the chosen path is in . Then one of the players has a winning Strategyin this Game.
- Leg
- Legendre Addition Theorem
- Legendre Differential Equation
- Legendre Duplication Formula
- Legendre Function of the First Kind
- Legendre Function of the Second Kind
- Legendre-Gauss Quadrature
- Legendre-Jacobi Elliptic Integral
- Legendre Polynomial
- Legendre Polynomial of the Second Kind
- Legendre Quadrature
- Legendre Relation
- Legendre's Chi-Function
- Legendre's Constant
- Legendre Series
- Legendre's Factorization Method
- Legendre's Formula
- Legendre's Quadratic Reciprocity Law
- Legendre Sum
- Legendre Symbol
- Legendre Transformation
- Lehmer Method
- Lehmer Number
- Lehmer-Schur Method
- Lehmer's Constant