李文威《代数学讲义》学习笔记——23集合的积与无交并(2)——无交并的“外在”版本;第i个嵌入映射是单射;无交并的“外在”版本等于所有嵌入 Template




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tomski李文威《代数学讲义》学习笔记——23集合的积与无交并(2)——无交并的“外在”版本;第i个嵌入映射是单射;无交并的“外在”版本等于所有嵌入 coloring