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Mirrors > Home > MPE Home > Th. List > nqerid | Structured version Visualization version GIF version |
Description: Corollary of nqereu 9789: 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 9790 | . . 3 ⊢ [Q]:(N × N)⟶Q | |
2 | ffun 6086 | . . 3 ⊢ ([Q]:(N × N)⟶Q → Fun [Q]) | |
3 | 1, 2 | ax-mp 5 | . 2 ⊢ Fun [Q] |
4 | elpqn 9785 | . . 3 ⊢ (𝐴 ∈ Q → 𝐴 ∈ (N × N)) | |
5 | id 22 | . . 3 ⊢ (𝐴 ∈ Q → 𝐴 ∈ Q) | |
6 | enqer 9781 | . . . . 5 ⊢ ~Q Er (N × N) | |
7 | 6 | a1i 11 | . . . 4 ⊢ (𝐴 ∈ Q → ~Q Er (N × N)) |
8 | 7, 4 | erref 7807 | . . 3 ⊢ (𝐴 ∈ Q → 𝐴 ~Q 𝐴) |
9 | df-erq 9773 | . . . . 5 ⊢ [Q] = ( ~Q ∩ ((N × N) × Q)) | |
10 | 9 | breqi 4691 | . . . 4 ⊢ (𝐴[Q]𝐴 ↔ 𝐴( ~Q ∩ ((N × N) × Q))𝐴) |
11 | brinxp2 5214 | . . . 4 ⊢ (𝐴( ~Q ∩ ((N × N) × Q))𝐴 ↔ (𝐴 ∈ (N × N) ∧ 𝐴 ∈ Q ∧ 𝐴 ~Q 𝐴)) | |
12 | 10, 11 | bitri 264 | . . 3 ⊢ (𝐴[Q]𝐴 ↔ (𝐴 ∈ (N × N) ∧ 𝐴 ∈ Q ∧ 𝐴 ~Q 𝐴)) |
13 | 4, 5, 8, 12 | syl3anbrc 1265 | . 2 ⊢ (𝐴 ∈ Q → 𝐴[Q]𝐴) |
14 | funbrfv 6272 | . 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 ∧ w3a 1054 = wceq 1523 ∈ wcel 2030 ∩ cin 3606 class class class wbr 4685 × cxp 5141 Fun wfun 5920 ⟶wf 5922 ‘cfv 5926 Er wer 7784 Ncnpi 9704 ~Q ceq 9711 Qcnq 9712 [Q]cerq 9714 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1762 ax-4 1777 ax-5 1879 ax-6 1945 ax-7 1981 ax-8 2032 ax-9 2039 ax-10 2059 ax-11 2074 ax-12 2087 ax-13 2282 ax-ext 2631 ax-sep 4814 ax-nul 4822 ax-pow 4873 ax-pr 4936 ax-un 6991 |
This theorem depends on definitions: df-bi 197 df-or 384 df-an 385 df-3or 1055 df-3an 1056 df-tru 1526 df-ex 1745 df-nf 1750 df-sb 1938 df-eu 2502 df-mo 2503 df-clab 2638 df-cleq 2644 df-clel 2647 df-nfc 2782 df-ne 2824 df-ral 2946 df-rex 2947 df-reu 2948 df-rmo 2949 df-rab 2950 df-v 3233 df-sbc 3469 df-csb 3567 df-dif 3610 df-un 3612 df-in 3614 df-ss 3621 df-pss 3623 df-nul 3949 df-if 4120 df-pw 4193 df-sn 4211 df-pr 4213 df-tp 4215 df-op 4217 df-uni 4469 df-iun 4554 df-br 4686 df-opab 4746 df-mpt 4763 df-tr 4786 df-id 5053 df-eprel 5058 df-po 5064 df-so 5065 df-fr 5102 df-we 5104 df-xp 5149 df-rel 5150 df-cnv 5151 df-co 5152 df-dm 5153 df-rn 5154 df-res 5155 df-ima 5156 df-pred 5718 df-ord 5764 df-on 5765 df-lim 5766 df-suc 5767 df-iota 5889 df-fun 5928 df-fn 5929 df-f 5930 df-f1 5931 df-fo 5932 df-f1o 5933 df-fv 5934 df-ov 6693 df-oprab 6694 df-mpt2 6695 df-om 7108 df-1st 7210 df-2nd 7211 df-wrecs 7452 df-recs 7513 df-rdg 7551 df-1o 7605 df-oadd 7609 df-omul 7610 df-er 7787 df-ni 9732 df-mi 9734 df-lti 9735 df-enq 9771 df-nq 9772 df-erq 9773 df-1nq 9776 |
This theorem is referenced by: addassnq 9818 mulassnq 9819 distrnq 9821 mulidnq 9823 recmulnq 9824 1lt2nq 9833 ltexnq 9835 prlem934 9893 |
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