摘要
给出了由对称差判断集族存在相异代表系的一个充分条件,揭示了集族的对称差与相异代表系之间的关系。
The paper gives a sufficient con dition in judging the systems of dis tinct representatiles existing in sets,revealing the relation between the symmetric difference and the system of distinct representatives of sets
出处
《固原师专学报》
2000年第3期7-9,共3页
Journal of Guyuan Teachers College
关键词
对称差
相异代表系
集族
组合理论
symmerric difference
System of distinct representatives
