the probabilistic method(此版本不好有重传的版本)

Theprobabilisticmethodisanonconstructivemethod,primarilyusedincombinatoricsandpioneeredbyPaulErdős,forprovingtheexistenceofaprescribedkindofmathematicalobject.Thismethodhasnowbeenappliedtootherareasofmathematicssuchasnumbertheory,linearalgebra,andrealana