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| Mirrors > Home > MPE Home > Th. List > nqerid | Structured version Visualization version GIF version | ||
| Description: Corollary of nqereu 10827: 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 10828 | . . 3 ⊢ [Q]:(N × N)⟶Q | |
| 2 | ffun 6659 | . . 3 ⊢ ([Q]:(N × N)⟶Q → Fun [Q]) | |
| 3 | 1, 2 | ax-mp 5 | . 2 ⊢ Fun [Q] |
| 4 | elpqn 10823 | . . 3 ⊢ (𝐴 ∈ Q → 𝐴 ∈ (N × N)) | |
| 5 | id 22 | . . 3 ⊢ (𝐴 ∈ Q → 𝐴 ∈ Q) | |
| 6 | enqer 10819 | . . . . 5 ⊢ ~Q Er (N × N) | |
| 7 | 6 | a1i 11 | . . . 4 ⊢ (𝐴 ∈ Q → ~Q Er (N × N)) |
| 8 | 7, 4 | erref 8648 | . . 3 ⊢ (𝐴 ∈ Q → 𝐴 ~Q 𝐴) |
| 9 | df-erq 10811 | . . . . 5 ⊢ [Q] = ( ~Q ∩ ((N × N) × Q)) | |
| 10 | 9 | breqi 5099 | . . . 4 ⊢ (𝐴[Q]𝐴 ↔ 𝐴( ~Q ∩ ((N × N) × Q))𝐴) |
| 11 | brinxp2 5697 | . . . 4 ⊢ (𝐴( ~Q ∩ ((N × N) × Q))𝐴 ↔ ((𝐴 ∈ (N × N) ∧ 𝐴 ∈ Q) ∧ 𝐴 ~Q 𝐴)) | |
| 12 | 10, 11 | bitri 275 | . . 3 ⊢ (𝐴[Q]𝐴 ↔ ((𝐴 ∈ (N × N) ∧ 𝐴 ∈ Q) ∧ 𝐴 ~Q 𝐴)) |
| 13 | 4, 5, 8, 12 | syl21anbrc 1345 | . 2 ⊢ (𝐴 ∈ Q → 𝐴[Q]𝐴) |
| 14 | funbrfv 6876 | . 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 395 = wceq 1541 ∈ wcel 2113 ∩ cin 3897 class class class wbr 5093 × cxp 5617 Fun wfun 6480 ⟶wf 6482 ‘cfv 6486 Er wer 8625 Ncnpi 10742 ~Q ceq 10749 Qcnq 10750 [Q]cerq 10752 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1968 ax-7 2009 ax-8 2115 ax-9 2123 ax-10 2146 ax-11 2162 ax-12 2182 ax-ext 2705 ax-sep 5236 ax-nul 5246 ax-pr 5372 ax-un 7674 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3or 1087 df-3an 1088 df-tru 1544 df-fal 1554 df-ex 1781 df-nf 1785 df-sb 2068 df-mo 2537 df-eu 2566 df-clab 2712 df-cleq 2725 df-clel 2808 df-nfc 2882 df-ne 2930 df-ral 3049 df-rex 3058 df-rmo 3347 df-reu 3348 df-rab 3397 df-v 3439 df-sbc 3738 df-csb 3847 df-dif 3901 df-un 3903 df-in 3905 df-ss 3915 df-pss 3918 df-nul 4283 df-if 4475 df-pw 4551 df-sn 4576 df-pr 4578 df-op 4582 df-uni 4859 df-iun 4943 df-br 5094 df-opab 5156 df-mpt 5175 df-tr 5201 df-id 5514 df-eprel 5519 df-po 5527 df-so 5528 df-fr 5572 df-we 5574 df-xp 5625 df-rel 5626 df-cnv 5627 df-co 5628 df-dm 5629 df-rn 5630 df-res 5631 df-ima 5632 df-pred 6253 df-ord 6314 df-on 6315 df-lim 6316 df-suc 6317 df-iota 6442 df-fun 6488 df-fn 6489 df-f 6490 df-f1 6491 df-fo 6492 df-f1o 6493 df-fv 6494 df-ov 7355 df-oprab 7356 df-mpo 7357 df-om 7803 df-1st 7927 df-2nd 7928 df-frecs 8217 df-wrecs 8248 df-recs 8297 df-rdg 8335 df-1o 8391 df-oadd 8395 df-omul 8396 df-er 8628 df-ni 10770 df-mi 10772 df-lti 10773 df-enq 10809 df-nq 10810 df-erq 10811 df-1nq 10814 |
| This theorem is referenced by: addassnq 10856 mulassnq 10857 distrnq 10859 mulidnq 10861 recmulnq 10862 1lt2nq 10871 ltexnq 10873 prlem934 10931 |
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