有限群的不可约实特征标未必由实表示提供.证明了当有限群G恰有3个不可约实特征标时,其中次数较大的非主不可约实特征标一定由实表示提供,并且还给出了其中的两个非主不可约实特征标的某些性质.
The real characters of finite groups are not always afforded by real representations.Let G be a finite group,we write IrrR(G) for the set of irreducible realcharacters of G.When IrrR(G)={1G,φ,η},in this paper,we will prove the character φ must be afford by a real representation if φ(1)≥η(1).Furthermore,we will give some properties of φ and η.