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| Mirrors > Home > MPE Home > Th. List > nqerid | Structured version Visualization version GIF version | ||
| Description: Corollary of nqereu 10852: 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 10853 | . . 3 ⊢ [Q]:(N × N)⟶Q | |
| 2 | ffun 6673 | . . 3 ⊢ ([Q]:(N × N)⟶Q → Fun [Q]) | |
| 3 | 1, 2 | ax-mp 5 | . 2 ⊢ Fun [Q] |
| 4 | elpqn 10848 | . . 3 ⊢ (𝐴 ∈ Q → 𝐴 ∈ (N × N)) | |
| 5 | id 22 | . . 3 ⊢ (𝐴 ∈ Q → 𝐴 ∈ Q) | |
| 6 | enqer 10844 | . . . . 5 ⊢ ~Q Er (N × N) | |
| 7 | 6 | a1i 11 | . . . 4 ⊢ (𝐴 ∈ Q → ~Q Er (N × N)) |
| 8 | 7, 4 | erref 8666 | . . 3 ⊢ (𝐴 ∈ Q → 𝐴 ~Q 𝐴) |
| 9 | df-erq 10836 | . . . . 5 ⊢ [Q] = ( ~Q ∩ ((N × N) × Q)) | |
| 10 | 9 | breqi 5106 | . . . 4 ⊢ (𝐴[Q]𝐴 ↔ 𝐴( ~Q ∩ ((N × N) × Q))𝐴) |
| 11 | brinxp2 5710 | . . . 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 1346 | . 2 ⊢ (𝐴 ∈ Q → 𝐴[Q]𝐴) |
| 14 | funbrfv 6890 | . 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 1542 ∈ wcel 2114 ∩ cin 3902 class class class wbr 5100 × cxp 5630 Fun wfun 6494 ⟶wf 6496 ‘cfv 6500 Er wer 8642 Ncnpi 10767 ~Q ceq 10774 Qcnq 10775 [Q]cerq 10777 |
| 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 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-10 2147 ax-11 2163 ax-12 2185 ax-ext 2709 ax-sep 5243 ax-nul 5253 ax-pr 5379 ax-un 7690 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3or 1088 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-nf 1786 df-sb 2069 df-mo 2540 df-eu 2570 df-clab 2716 df-cleq 2729 df-clel 2812 df-nfc 2886 df-ne 2934 df-ral 3053 df-rex 3063 df-rmo 3352 df-reu 3353 df-rab 3402 df-v 3444 df-sbc 3743 df-csb 3852 df-dif 3906 df-un 3908 df-in 3910 df-ss 3920 df-pss 3923 df-nul 4288 df-if 4482 df-pw 4558 df-sn 4583 df-pr 4585 df-op 4589 df-uni 4866 df-iun 4950 df-br 5101 df-opab 5163 df-mpt 5182 df-tr 5208 df-id 5527 df-eprel 5532 df-po 5540 df-so 5541 df-fr 5585 df-we 5587 df-xp 5638 df-rel 5639 df-cnv 5640 df-co 5641 df-dm 5642 df-rn 5643 df-res 5644 df-ima 5645 df-pred 6267 df-ord 6328 df-on 6329 df-lim 6330 df-suc 6331 df-iota 6456 df-fun 6502 df-fn 6503 df-f 6504 df-f1 6505 df-fo 6506 df-f1o 6507 df-fv 6508 df-ov 7371 df-oprab 7372 df-mpo 7373 df-om 7819 df-1st 7943 df-2nd 7944 df-frecs 8233 df-wrecs 8264 df-recs 8313 df-rdg 8351 df-1o 8407 df-oadd 8411 df-omul 8412 df-er 8645 df-ni 10795 df-mi 10797 df-lti 10798 df-enq 10834 df-nq 10835 df-erq 10836 df-1nq 10839 |
| This theorem is referenced by: addassnq 10881 mulassnq 10882 distrnq 10884 mulidnq 10886 recmulnq 10887 1lt2nq 10896 ltexnq 10898 prlem934 10956 |
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