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Mirrors > Home > MPE Home > Th. List > nqerid | Structured version Visualization version GIF version |
Description: Corollary of nqereu 10920: the function [Q] acts as the identity on members of Q. (Contributed by Mario Carneiro, 6-May-2013.) (New usage is discouraged.) |
Ref | Expression |
---|---|
nqerid | ⊢ (𝐴 ∈ Q → ([Q]‘𝐴) = 𝐴) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | nqerf 10921 | . . 3 ⊢ [Q]:(N × N)⟶Q | |
2 | ffun 6717 | . . 3 ⊢ ([Q]:(N × N)⟶Q → Fun [Q]) | |
3 | 1, 2 | ax-mp 5 | . 2 ⊢ Fun [Q] |
4 | elpqn 10916 | . . 3 ⊢ (𝐴 ∈ Q → 𝐴 ∈ (N × N)) | |
5 | id 22 | . . 3 ⊢ (𝐴 ∈ Q → 𝐴 ∈ Q) | |
6 | enqer 10912 | . . . . 5 ⊢ ~Q Er (N × N) | |
7 | 6 | a1i 11 | . . . 4 ⊢ (𝐴 ∈ Q → ~Q Er (N × N)) |
8 | 7, 4 | erref 8719 | . . 3 ⊢ (𝐴 ∈ Q → 𝐴 ~Q 𝐴) |
9 | df-erq 10904 | . . . . 5 ⊢ [Q] = ( ~Q ∩ ((N × N) × Q)) | |
10 | 9 | breqi 5153 | . . . 4 ⊢ (𝐴[Q]𝐴 ↔ 𝐴( ~Q ∩ ((N × N) × Q))𝐴) |
11 | brinxp2 5751 | . . . 4 ⊢ (𝐴( ~Q ∩ ((N × N) × Q))𝐴 ↔ ((𝐴 ∈ (N × N) ∧ 𝐴 ∈ Q) ∧ 𝐴 ~Q 𝐴)) | |
12 | 10, 11 | bitri 274 | . . 3 ⊢ (𝐴[Q]𝐴 ↔ ((𝐴 ∈ (N × N) ∧ 𝐴 ∈ Q) ∧ 𝐴 ~Q 𝐴)) |
13 | 4, 5, 8, 12 | syl21anbrc 1344 | . 2 ⊢ (𝐴 ∈ Q → 𝐴[Q]𝐴) |
14 | funbrfv 6939 | . 2 ⊢ (Fun [Q] → (𝐴[Q]𝐴 → ([Q]‘𝐴) = 𝐴)) | |
15 | 3, 13, 14 | mpsyl 68 | 1 ⊢ (𝐴 ∈ Q → ([Q]‘𝐴) = 𝐴) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 396 = wceq 1541 ∈ wcel 2106 ∩ cin 3946 class class class wbr 5147 × cxp 5673 Fun wfun 6534 ⟶wf 6536 ‘cfv 6540 Er wer 8696 Ncnpi 10835 ~Q ceq 10842 Qcnq 10843 [Q]cerq 10845 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1913 ax-6 1971 ax-7 2011 ax-8 2108 ax-9 2116 ax-10 2137 ax-11 2154 ax-12 2171 ax-ext 2703 ax-sep 5298 ax-nul 5305 ax-pr 5426 ax-un 7721 |
This theorem depends on definitions: df-bi 206 df-an 397 df-or 846 df-3or 1088 df-3an 1089 df-tru 1544 df-fal 1554 df-ex 1782 df-nf 1786 df-sb 2068 df-mo 2534 df-eu 2563 df-clab 2710 df-cleq 2724 df-clel 2810 df-nfc 2885 df-ne 2941 df-ral 3062 df-rex 3071 df-rmo 3376 df-reu 3377 df-rab 3433 df-v 3476 df-sbc 3777 df-csb 3893 df-dif 3950 df-un 3952 df-in 3954 df-ss 3964 df-pss 3966 df-nul 4322 df-if 4528 df-pw 4603 df-sn 4628 df-pr 4630 df-op 4634 df-uni 4908 df-iun 4998 df-br 5148 df-opab 5210 df-mpt 5231 df-tr 5265 df-id 5573 df-eprel 5579 df-po 5587 df-so 5588 df-fr 5630 df-we 5632 df-xp 5681 df-rel 5682 df-cnv 5683 df-co 5684 df-dm 5685 df-rn 5686 df-res 5687 df-ima 5688 df-pred 6297 df-ord 6364 df-on 6365 df-lim 6366 df-suc 6367 df-iota 6492 df-fun 6542 df-fn 6543 df-f 6544 df-f1 6545 df-fo 6546 df-f1o 6547 df-fv 6548 df-ov 7408 df-oprab 7409 df-mpo 7410 df-om 7852 df-1st 7971 df-2nd 7972 df-frecs 8262 df-wrecs 8293 df-recs 8367 df-rdg 8406 df-1o 8462 df-oadd 8466 df-omul 8467 df-er 8699 df-ni 10863 df-mi 10865 df-lti 10866 df-enq 10902 df-nq 10903 df-erq 10904 df-1nq 10907 |
This theorem is referenced by: addassnq 10949 mulassnq 10950 distrnq 10952 mulidnq 10954 recmulnq 10955 1lt2nq 10964 ltexnq 10966 prlem934 11024 |
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