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??. ???(Set Theory)????????.????????16???,???????????????.?????????? 19?? 70??????????(G . Cantor) ??????????????????????.???????????????????????,?????????????????????,???????????.??,?????????????.?????????,?????????????????,?????,?????????????????,??????(B . A . W . Russell)??,?????????????????.. .
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1. ???
2. 1. ??????? ??(????)
????????
??????????
?????????????
3. ?? ???(Set Theory)????????.????????16???,???????????????.?????????? 19?? 70??????????(G . Cantor) ??????????????????????.???????????????????????,?????????????????????,???????????.??,?????????????.?????????,?????????????????,?????,?????????????????,??????(B . A . W . Russell)??,?????????????????.
4. ?????????????????????????????????,????????????ZFS(E . Zermelo, A . Fraenkel, T . Skolem)?NBG(Von Neurnann, P . Bernavs, K . Gödel)?????????. ? 20?? 60??,P . L . Cohen???????????????????????????,???????????,????.?????,????? L . A.Zadeh???Fuzzy???, ?? 20??80???????Z . Pawlak???Rough???,??????????????, ??????????,????????????,???????.???????????????????????.
5. ???????????????????????????????????.???????????????,?????????????,????????????.
6. ??(????) ???????????(?????????,?A,B?),????????? (?????????,?x,y?).
x?A?????: x?A (??x??A)
x??A?????: x?A (??x???A)
????????,???????A,????x, x?A?x?A?????????.
7. ??10??????A={1, 3, 5, 7, 9}
?????????????????{a, 2, Fred, New Jerseg}
??B={x | x???10????}
?????A=B
8. ???????? ????:??????A?B????????,????A?B??,??A= B?B=A.
???: ????B???????A???,B??A????(????). ??B?A (??B???A),?A?B (??A??B).
??: A= B????A?B?A?B.
9. ?????????? ?A?????,???B??????????:B={x?A | P(x)}, ??P(x)??x?B????????
??:?????????????,??????,??????????:
?={x?A | x ?x}
???????,????????????????,??,?????. ??????????. ???E??.
10. ????? ??4 ?S?????S???n?????,n?????,??S?????,?n???S???,?| S |???
? ?A???10??????,?| A | = 5
??F????,??| F | = 0
??5 ???????????,????????
11. ??? ???????????????????????,???????????????????????????,?????????,??S????????????
12. ??? ??6 ????S, S???????S???????,?P(S)???
? ??{0, 1, 2}?????P({0,1,2}={F,{0},{1},{2},{0,1},{0,2},{1,2},{0,1,2}}?
????????????{F}????????
13. ??? ????????????{F}????????
P(F)={F}P({F})={F,{F}}
???????n???,????????2n????
14. 2. ???? ??7 ??n??(a1,a2,
,an)??a1??????,a2??2???,
,an??n????????
2?????????
??A?B?????C=A?B???????(a,b)???, ??a?A, b?B. ???
A?B={(a,b) | a?A? b?B}
15. ???? ? ?A???????????,B????????????????A?B?????A×B????
?:????A×B???(a, b)????????,??a???,?b???????????A×B????????????????????
16. ???? ? A={1,2}, B={a, b, c}, A×B=?
???A×B????B×A
17. ???? ??9 ??A1, A2,
,An??????A1×A2×
×An??,????n??(a1,a2,
,an)???,????i=1,2,
,n,ai?Ai?
???????A×B×C,??A={0,1},B={1,2},C={0,1,2}?
18. ???? ???????A×B×C,??A={0,1},B={1,2},C={0,1,2}?
?:A×B×C={(0,1,0),(01,1),(0,1,2),(0,2,0),(0,2,1),(0,2,2),(1,1,0),(1,1,1),(1,1,2),(1,2,0),(1,2,1),(1,2,2)}
19. 3. ???? ????
????
????????(?)??
???????
20. ???? ??A?B????A?B??????????, ??A?B, ???
A?B={x | x?A?x?B}
????????:
??? A ? B= B ? A
???A ? (B ? C)= (A ? B) ? C
21. ???? ??A?B??????A?B??????????, ??A ? B, ???
A ? B={x | x?A?x?B}
????????:
??? A ? B= B ? A
???A ? (B ? C)= (A ? B) ? C
22. ????????(?)?? ??????:???A?????B??????????????A???B??,??A-B, ???
A-B={x?A | x?B}
????U,??A?U, U-A??A??U???,?U??????,???A???,??
23. ????
24. ??????? ?????????????????????????????????????,??????????????????????????1???????????,?0????????????
25. ??????? ? ??????An(B?C)=(A nB) ? (AnC)
26. ???????? ?????
??:????????????????????,??????????????
27. ???????? ???????????????????????
????U????,???U???????????,??a1,a2,
,an?????????n?????U???A:??ai??A,?????i??1;??ai???A,?????i??0?
28. ???????? ? ?U={1,2,3,4,5,6,7,8,9,10},??U?????????,?ai=i???U????????????????????5???????????????
?:U?????????{1,3,5,7,9}???,?1,3,5,7,9??1,????0,?10101 01010
29. ???????? ? ??{1,2,3,4,5}?{1,3,5,7,9}??????11111 00000?10101 01010,??????????????
?:?????????????11111 00000 ? 10101 01010 = 11111 01010,????{1,2,3,4,5,7,9}????????????11111 00000 ? 10101 01010=10101 00000,????{1,3,5}
30. 6. ???? ?????
???????
???
??
????
31. ????? ???????: ??????
????????--??: ??????A?B??????,??A?B????????.??A~B.
?????:
1. ???: A~A;
2. ???: A~B?B~A;
3. ???: A~B, B~C?A~C.
32. ??????? ???:
0:=?, 1:={?}
????: n+1:={0,1,
,n}
????: N={0,1,
}, N+ ={1,2,
}
???: ????A????????,??A????. ??: ??????
????????????. ???????????????
33. ???(I) ???: ?????????????
???: ?????N??????????
??1. ????Q={m/n | m?Z, n?N+}????
??:????h=|m|+n
??2. ??????????????
34. ???(II) ??3. ?????????????????????
??: ??????.
??1. ???????????
??2.?A????, B???,?A?B~B
??: ?????????????????????????(at most countable) ????(enumeratable),???????
35. ???? ????: ????N??????????
????: ?P(N)??????????????
??3. F={f: N?{0,1}}?P(N)??
??4. X={A?P(N) | ?k?N, ?n?k, n?A}????
??5. ?????1=0.11
.(1??)