Fp\{0}={1,2,3,···,p-1}∴Fp的阶为p-1易知乘群Fp\{0}为循环群Z/(p-1)Z={0,1,2,···,p-2}∴Z/(p-1)Z的阶为p-1由定理知 每个阶为m的有限循环群同构于加群Z/mZ即Fp\{0}同构于加群Z/(p-1)Z Fp\{0}={1,2,3,···,p-1}∴Fp的阶为p-1易知乘群Fp\{0...