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Mirrors > Home > ILE Home > Th. List > fidifsnen | Unicode version |
Description: All decrements of a finite set are equinumerous. (Contributed by Jim Kingdon, 9-Sep-2021.) |
Ref | Expression |
---|---|
fidifsnen |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | difexg 3898 | . . . . . 6 | |
2 | 1 | 3ad2ant1 925 | . . . . 5 |
3 | 2 | adantr 261 | . . . 4 |
4 | enrefg 6244 | . . . 4 | |
5 | 3, 4 | syl 14 | . . 3 |
6 | sneq 3386 | . . . . 5 | |
7 | 6 | difeq2d 3062 | . . . 4 |
8 | 7 | adantl 262 | . . 3 |
9 | 5, 8 | breqtrd 3788 | . 2 |
10 | 2 | adantr 261 | . . 3 |
11 | eqid 2040 | . . . 4 | |
12 | iftrue 3336 | . . . . . . . 8 | |
13 | 12 | adantl 262 | . . . . . . 7 |
14 | simpll2 944 | . . . . . . . 8 | |
15 | 14 | adantr 261 | . . . . . . 7 |
16 | 13, 15 | eqeltrd 2114 | . . . . . 6 |
17 | simpllr 486 | . . . . . . . 8 | |
18 | 13 | eqeq1d 2048 | . . . . . . . 8 |
19 | 17, 18 | mtbird 598 | . . . . . . 7 |
20 | 19 | neneqad 2284 | . . . . . 6 |
21 | eldifsn 3495 | . . . . . 6 | |
22 | 16, 20, 21 | sylanbrc 394 | . . . . 5 |
23 | iffalse 3339 | . . . . . . . 8 | |
24 | 23 | adantl 262 | . . . . . . 7 |
25 | eldifi 3066 | . . . . . . . 8 | |
26 | 25 | ad2antlr 458 | . . . . . . 7 |
27 | 24, 26 | eqeltrd 2114 | . . . . . 6 |
28 | simpr 103 | . . . . . . . 8 | |
29 | 24 | eqeq1d 2048 | . . . . . . . 8 |
30 | 28, 29 | mtbird 598 | . . . . . . 7 |
31 | 30 | neneqad 2284 | . . . . . 6 |
32 | 27, 31, 21 | sylanbrc 394 | . . . . 5 |
33 | simpll1 943 | . . . . . . 7 | |
34 | 25 | adantl 262 | . . . . . . 7 |
35 | simpll3 945 | . . . . . . 7 | |
36 | fidceq 6330 | . . . . . . 7 DECID | |
37 | 33, 34, 35, 36 | syl3anc 1135 | . . . . . 6 DECID |
38 | exmiddc 744 | . . . . . 6 DECID | |
39 | 37, 38 | syl 14 | . . . . 5 |
40 | 22, 32, 39 | mpjaodan 711 | . . . 4 |
41 | iftrue 3336 | . . . . . . 7 | |
42 | 41 | adantl 262 | . . . . . 6 |
43 | simpl3 909 | . . . . . . . 8 | |
44 | simpr 103 | . . . . . . . . . 10 | |
45 | 44 | neneqad 2284 | . . . . . . . . 9 |
46 | 45 | necomd 2291 | . . . . . . . 8 |
47 | eldifsn 3495 | . . . . . . . 8 | |
48 | 43, 46, 47 | sylanbrc 394 | . . . . . . 7 |
49 | 48 | ad2antrr 457 | . . . . . 6 |
50 | 42, 49 | eqeltrd 2114 | . . . . 5 |
51 | iffalse 3339 | . . . . . . 7 | |
52 | 51 | adantl 262 | . . . . . 6 |
53 | eldifi 3066 | . . . . . . . 8 | |
54 | 53 | ad2antlr 458 | . . . . . . 7 |
55 | simpr 103 | . . . . . . . 8 | |
56 | 55 | neneqad 2284 | . . . . . . 7 |
57 | eldifsn 3495 | . . . . . . 7 | |
58 | 54, 56, 57 | sylanbrc 394 | . . . . . 6 |
59 | 52, 58 | eqeltrd 2114 | . . . . 5 |
60 | simpll1 943 | . . . . . . 7 | |
61 | 53 | adantl 262 | . . . . . . 7 |
62 | simpll2 944 | . . . . . . 7 | |
63 | fidceq 6330 | . . . . . . 7 DECID | |
64 | 60, 61, 62, 63 | syl3anc 1135 | . . . . . 6 DECID |
65 | exmiddc 744 | . . . . . 6 DECID | |
66 | 64, 65 | syl 14 | . . . . 5 |
67 | 50, 59, 66 | mpjaodan 711 | . . . 4 |
68 | 12 | adantl 262 | . . . . . . . . . 10 |
69 | 68 | eqeq2d 2051 | . . . . . . . . 9 |
70 | 69 | biimpar 281 | . . . . . . . 8 |
71 | 70 | a1d 22 | . . . . . . 7 |
72 | simpr 103 | . . . . . . . . . . 11 | |
73 | 51 | eqeq2d 2051 | . . . . . . . . . . . 12 |
74 | 73 | ad2antlr 458 | . . . . . . . . . . 11 |
75 | 72, 74 | mpbid 135 | . . . . . . . . . 10 |
76 | simpllr 486 | . . . . . . . . . 10 | |
77 | 75, 76 | eqtr3d 2074 | . . . . . . . . 9 |
78 | simprr 484 | . . . . . . . . . . . . 13 | |
79 | 78 | ad2antrr 457 | . . . . . . . . . . . 12 |
80 | 79 | eldifbd 2930 | . . . . . . . . . . 11 |
81 | 80 | adantr 261 | . . . . . . . . . 10 |
82 | velsn 3392 | . . . . . . . . . 10 | |
83 | 81, 82 | sylnib 601 | . . . . . . . . 9 |
84 | 77, 83 | pm2.21dd 550 | . . . . . . . 8 |
85 | 84 | ex 108 | . . . . . . 7 |
86 | simpll1 943 | . . . . . . . . . 10 | |
87 | 53 | ad2antll 460 | . . . . . . . . . 10 |
88 | simpll2 944 | . . . . . . . . . 10 | |
89 | 86, 87, 88, 63 | syl3anc 1135 | . . . . . . . . 9 DECID |
90 | 89, 65 | syl 14 | . . . . . . . 8 |
91 | 90 | adantr 261 | . . . . . . 7 |
92 | 71, 85, 91 | mpjaodan 711 | . . . . . 6 |
93 | 41 | eqeq2d 2051 | . . . . . . . . 9 |
94 | 93 | biimprcd 149 | . . . . . . . 8 |
95 | 94 | adantl 262 | . . . . . . 7 |
96 | 69, 95 | sylbid 139 | . . . . . 6 |
97 | 92, 96 | impbid 120 | . . . . 5 |
98 | simplr 482 | . . . . . . . . 9 | |
99 | 41 | adantl 262 | . . . . . . . . 9 |
100 | 98, 99 | eqtrd 2072 | . . . . . . . 8 |
101 | simpllr 486 | . . . . . . . 8 | |
102 | 100, 101 | pm2.21dd 550 | . . . . . . 7 |
103 | 23 | ad3antlr 462 | . . . . . . . 8 |
104 | simplr 482 | . . . . . . . . 9 | |
105 | 51 | adantl 262 | . . . . . . . . 9 |
106 | 104, 105 | eqtrd 2072 | . . . . . . . 8 |
107 | 103, 106 | eqtr2d 2073 | . . . . . . 7 |
108 | 90 | ad2antrr 457 | . . . . . . 7 |
109 | 102, 107, 108 | mpjaodan 711 | . . . . . 6 |
110 | simprl 483 | . . . . . . . . . . . 12 | |
111 | 110 | eldifbd 2930 | . . . . . . . . . . 11 |
112 | velsn 3392 | . . . . . . . . . . 11 | |
113 | 111, 112 | sylnib 601 | . . . . . . . . . 10 |
114 | 113 | ad2antrr 457 | . . . . . . . . 9 |
115 | simpr 103 | . . . . . . . . . . 11 | |
116 | 23 | eqeq2d 2051 | . . . . . . . . . . . 12 |
117 | 116 | ad2antlr 458 | . . . . . . . . . . 11 |
118 | 115, 117 | mpbid 135 | . . . . . . . . . 10 |
119 | 118 | eqeq1d 2048 | . . . . . . . . 9 |
120 | 114, 119 | mtbird 598 | . . . . . . . 8 |
121 | 120, 51 | syl 14 | . . . . . . 7 |
122 | 121, 118 | eqtr2d 2073 | . . . . . 6 |
123 | 109, 122 | impbida 528 | . . . . 5 |
124 | 39 | adantrr 448 | . . . . 5 |
125 | 97, 123, 124 | mpjaodan 711 | . . . 4 |
126 | 11, 40, 67, 125 | f1o2d 5705 | . . 3 |
127 | f1oeng 6237 | . . 3 | |
128 | 10, 126, 127 | syl2anc 391 | . 2 |
129 | fidceq 6330 | . . 3 DECID | |
130 | exmiddc 744 | . . 3 DECID | |
131 | 129, 130 | syl 14 | . 2 |
132 | 9, 128, 131 | mpjaodan 711 | 1 |
Colors of variables: wff set class |
Syntax hints: wn 3 wi 4 wa 97 wb 98 wo 629 DECID wdc 742 w3a 885 wceq 1243 wcel 1393 wne 2204 cvv 2557 cdif 2914 cif 3331 csn 3375 class class class wbr 3764 cmpt 3818 wf1o 4901 cen 6219 cfn 6221 |
This theorem was proved from axioms: ax-1 5 ax-2 6 ax-mp 7 ax-ia1 99 ax-ia2 100 ax-ia3 101 ax-in1 544 ax-in2 545 ax-io 630 ax-5 1336 ax-7 1337 ax-gen 1338 ax-ie1 1382 ax-ie2 1383 ax-8 1395 ax-10 1396 ax-11 1397 ax-i12 1398 ax-bndl 1399 ax-4 1400 ax-13 1404 ax-14 1405 ax-17 1419 ax-i9 1423 ax-ial 1427 ax-i5r 1428 ax-ext 2022 ax-coll 3872 ax-sep 3875 ax-nul 3883 ax-pow 3927 ax-pr 3944 ax-un 4170 ax-setind 4262 ax-iinf 4311 |
This theorem depends on definitions: df-bi 110 df-dc 743 df-3or 886 df-3an 887 df-tru 1246 df-nf 1350 df-sb 1646 df-eu 1903 df-mo 1904 df-clab 2027 df-cleq 2033 df-clel 2036 df-nfc 2167 df-ne 2206 df-ral 2311 df-rex 2312 df-reu 2313 df-rab 2315 df-v 2559 df-sbc 2765 df-csb 2853 df-dif 2920 df-un 2922 df-in 2924 df-ss 2931 df-nul 3225 df-if 3332 df-pw 3361 df-sn 3381 df-pr 3382 df-op 3384 df-uni 3581 df-int 3616 df-iun 3659 df-br 3765 df-opab 3819 df-mpt 3820 df-tr 3855 df-id 4030 df-iord 4103 df-on 4105 df-suc 4108 df-iom 4314 df-xp 4351 df-rel 4352 df-cnv 4353 df-co 4354 df-dm 4355 df-rn 4356 df-res 4357 df-ima 4358 df-iota 4867 df-fun 4904 df-fn 4905 df-f 4906 df-f1 4907 df-fo 4908 df-f1o 4909 df-fv 4910 df-en 6222 df-fin 6224 |
This theorem is referenced by: dif1en 6337 |
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