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Mirrors > Home > MPE Home > Th. List > unblem1 | Structured version Visualization version Unicode version |
Description: Lemma for unbnn 8216. After removing the successor of an element from an unbounded set of natural numbers, the intersection of the result belongs to the original unbounded set. (Contributed by NM, 3-Dec-2003.) |
Ref | Expression |
---|---|
unblem1 |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | omsson 7069 |
. . . . . 6
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2 | sstr 3611 |
. . . . . 6
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3 | 1, 2 | mpan2 707 |
. . . . 5
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4 | 3 | ssdifssd 3748 |
. . . 4
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5 | 4 | ad2antrr 762 |
. . 3
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6 | ssel 3597 |
. . . . . 6
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7 | peano2b 7081 |
. . . . . 6
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8 | 6, 7 | syl6ib 241 |
. . . . 5
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9 | eleq1 2689 |
. . . . . . . 8
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10 | 9 | rexbidv 3052 |
. . . . . . 7
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11 | 10 | rspccva 3308 |
. . . . . 6
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12 | ssel 3597 |
. . . . . . . . . . 11
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13 | nnord 7073 |
. . . . . . . . . . . 12
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14 | ordn2lp 5743 |
. . . . . . . . . . . . . 14
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15 | imnan 438 |
. . . . . . . . . . . . . 14
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16 | 14, 15 | sylibr 224 |
. . . . . . . . . . . . 13
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17 | 16 | con2d 129 |
. . . . . . . . . . . 12
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18 | 13, 17 | syl 17 |
. . . . . . . . . . 11
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19 | 12, 18 | syl6 35 |
. . . . . . . . . 10
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20 | 19 | imdistand 728 |
. . . . . . . . 9
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21 | eldif 3584 |
. . . . . . . . . 10
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22 | ne0i 3921 |
. . . . . . . . . 10
![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() | |
23 | 21, 22 | sylbir 225 |
. . . . . . . . 9
![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() |
24 | 20, 23 | syl6 35 |
. . . . . . . 8
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25 | 24 | expd 452 |
. . . . . . 7
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26 | 25 | rexlimdv 3030 |
. . . . . 6
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27 | 11, 26 | syl5 34 |
. . . . 5
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28 | 8, 27 | sylan2d 499 |
. . . 4
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29 | 28 | impl 650 |
. . 3
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30 | onint 6995 |
. . 3
![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() | |
31 | 5, 29, 30 | syl2anc 693 |
. 2
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32 | 31 | eldifad 3586 |
1
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Colors of variables: wff setvar class |
Syntax hints: ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1722 ax-4 1737 ax-5 1839 ax-6 1888 ax-7 1935 ax-8 1992 ax-9 1999 ax-10 2019 ax-11 2034 ax-12 2047 ax-13 2246 ax-ext 2602 ax-sep 4781 ax-nul 4789 ax-pr 4906 ax-un 6949 |
This theorem depends on definitions: df-bi 197 df-or 385 df-an 386 df-3or 1038 df-3an 1039 df-tru 1486 df-ex 1705 df-nf 1710 df-sb 1881 df-eu 2474 df-mo 2475 df-clab 2609 df-cleq 2615 df-clel 2618 df-nfc 2753 df-ne 2795 df-ral 2917 df-rex 2918 df-rab 2921 df-v 3202 df-sbc 3436 df-dif 3577 df-un 3579 df-in 3581 df-ss 3588 df-pss 3590 df-nul 3916 df-if 4087 df-pw 4160 df-sn 4178 df-pr 4180 df-tp 4182 df-op 4184 df-uni 4437 df-int 4476 df-br 4654 df-opab 4713 df-tr 4753 df-eprel 5029 df-po 5035 df-so 5036 df-fr 5073 df-we 5075 df-ord 5726 df-on 5727 df-lim 5728 df-suc 5729 df-om 7066 |
This theorem is referenced by: unblem2 8213 unblem3 8214 |
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