• 2022-06-19
    设 [tex=0.786x1.0]LyvDGollVJ+xwurtsLcn0g==[/tex]是群。证明:[tex=0.786x1.0]LyvDGollVJ+xwurtsLcn0g==[/tex] 是交换群的充分必要条件是对任意的 [tex=7.786x1.571]eFKHPInykRsrUTRZhsgsyxVyP1D/Z2osNs6fyqWaNEIWMEGH5LziGwPHzUzf1fqSJUO9VGNj8OhakoYPrbly/Q==[/tex]。[br][/br]