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Theorem plusffval 17455
Description: The group addition operation as a function. (Contributed by Mario Carneiro, 14-Aug-2015.)
Hypotheses
Ref Expression
plusffval.1 𝐵 = (Base‘𝐺)
plusffval.2 + = (+g𝐺)
plusffval.3 = (+𝑓𝐺)
Assertion
Ref Expression
plusffval = (𝑥𝐵, 𝑦𝐵 ↦ (𝑥 + 𝑦))
Distinct variable groups:   𝑥,𝑦,𝐵   𝑥,𝐺,𝑦   𝑥, + ,𝑦
Allowed substitution hints:   (𝑥,𝑦)

Proof of Theorem plusffval
Dummy variable 𝑔 is distinct from all other variables.
StepHypRef Expression
1 plusffval.3 . 2 = (+𝑓𝐺)
2 fveq2 6333 . . . . . 6 (𝑔 = 𝐺 → (Base‘𝑔) = (Base‘𝐺))
3 plusffval.1 . . . . . 6 𝐵 = (Base‘𝐺)
42, 3syl6eqr 2823 . . . . 5 (𝑔 = 𝐺 → (Base‘𝑔) = 𝐵)
5 fveq2 6333 . . . . . . 7 (𝑔 = 𝐺 → (+g𝑔) = (+g𝐺))
6 plusffval.2 . . . . . . 7 + = (+g𝐺)
75, 6syl6eqr 2823 . . . . . 6 (𝑔 = 𝐺 → (+g𝑔) = + )
87oveqd 6813 . . . . 5 (𝑔 = 𝐺 → (𝑥(+g𝑔)𝑦) = (𝑥 + 𝑦))
94, 4, 8mpt2eq123dv 6868 . . . 4 (𝑔 = 𝐺 → (𝑥 ∈ (Base‘𝑔), 𝑦 ∈ (Base‘𝑔) ↦ (𝑥(+g𝑔)𝑦)) = (𝑥𝐵, 𝑦𝐵 ↦ (𝑥 + 𝑦)))
10 df-plusf 17449 . . . 4 +𝑓 = (𝑔 ∈ V ↦ (𝑥 ∈ (Base‘𝑔), 𝑦 ∈ (Base‘𝑔) ↦ (𝑥(+g𝑔)𝑦)))
11 df-ov 6799 . . . . . . . 8 (𝑥 + 𝑦) = ( + ‘⟨𝑥, 𝑦⟩)
12 fvrn0 6359 . . . . . . . 8 ( + ‘⟨𝑥, 𝑦⟩) ∈ (ran + ∪ {∅})
1311, 12eqeltri 2846 . . . . . . 7 (𝑥 + 𝑦) ∈ (ran + ∪ {∅})
1413rgen2w 3074 . . . . . 6 𝑥𝐵𝑦𝐵 (𝑥 + 𝑦) ∈ (ran + ∪ {∅})
15 eqid 2771 . . . . . . 7 (𝑥𝐵, 𝑦𝐵 ↦ (𝑥 + 𝑦)) = (𝑥𝐵, 𝑦𝐵 ↦ (𝑥 + 𝑦))
1615fmpt2 7391 . . . . . 6 (∀𝑥𝐵𝑦𝐵 (𝑥 + 𝑦) ∈ (ran + ∪ {∅}) ↔ (𝑥𝐵, 𝑦𝐵 ↦ (𝑥 + 𝑦)):(𝐵 × 𝐵)⟶(ran + ∪ {∅}))
1714, 16mpbi 220 . . . . 5 (𝑥𝐵, 𝑦𝐵 ↦ (𝑥 + 𝑦)):(𝐵 × 𝐵)⟶(ran + ∪ {∅})
183fvexi 6345 . . . . . 6 𝐵 ∈ V
1918, 18xpex 7113 . . . . 5 (𝐵 × 𝐵) ∈ V
206fvexi 6345 . . . . . . 7 + ∈ V
2120rnex 7251 . . . . . 6 ran + ∈ V
22 p0ex 4985 . . . . . 6 {∅} ∈ V
2321, 22unex 7107 . . . . 5 (ran + ∪ {∅}) ∈ V
24 fex2 7272 . . . . 5 (((𝑥𝐵, 𝑦𝐵 ↦ (𝑥 + 𝑦)):(𝐵 × 𝐵)⟶(ran + ∪ {∅}) ∧ (𝐵 × 𝐵) ∈ V ∧ (ran + ∪ {∅}) ∈ V) → (𝑥𝐵, 𝑦𝐵 ↦ (𝑥 + 𝑦)) ∈ V)
2517, 19, 23, 24mp3an 1572 . . . 4 (𝑥𝐵, 𝑦𝐵 ↦ (𝑥 + 𝑦)) ∈ V
269, 10, 25fvmpt 6426 . . 3 (𝐺 ∈ V → (+𝑓𝐺) = (𝑥𝐵, 𝑦𝐵 ↦ (𝑥 + 𝑦)))
27 fvprc 6327 . . . . 5 𝐺 ∈ V → (+𝑓𝐺) = ∅)
28 mpt20 6876 . . . . 5 (𝑥 ∈ ∅, 𝑦 ∈ ∅ ↦ (𝑥 + 𝑦)) = ∅
2927, 28syl6eqr 2823 . . . 4 𝐺 ∈ V → (+𝑓𝐺) = (𝑥 ∈ ∅, 𝑦 ∈ ∅ ↦ (𝑥 + 𝑦)))
30 fvprc 6327 . . . . . 6 𝐺 ∈ V → (Base‘𝐺) = ∅)
313, 30syl5eq 2817 . . . . 5 𝐺 ∈ V → 𝐵 = ∅)
32 mpt2eq12 6866 . . . . 5 ((𝐵 = ∅ ∧ 𝐵 = ∅) → (𝑥𝐵, 𝑦𝐵 ↦ (𝑥 + 𝑦)) = (𝑥 ∈ ∅, 𝑦 ∈ ∅ ↦ (𝑥 + 𝑦)))
3331, 31, 32syl2anc 573 . . . 4 𝐺 ∈ V → (𝑥𝐵, 𝑦𝐵 ↦ (𝑥 + 𝑦)) = (𝑥 ∈ ∅, 𝑦 ∈ ∅ ↦ (𝑥 + 𝑦)))
3429, 33eqtr4d 2808 . . 3 𝐺 ∈ V → (+𝑓𝐺) = (𝑥𝐵, 𝑦𝐵 ↦ (𝑥 + 𝑦)))
3526, 34pm2.61i 176 . 2 (+𝑓𝐺) = (𝑥𝐵, 𝑦𝐵 ↦ (𝑥 + 𝑦))
361, 35eqtri 2793 1 = (𝑥𝐵, 𝑦𝐵 ↦ (𝑥 + 𝑦))
Colors of variables: wff setvar class
Syntax hints:  ¬ wn 3   = wceq 1631  wcel 2145  wral 3061  Vcvv 3351  cun 3721  c0 4063  {csn 4317  cop 4323   × cxp 5248  ran crn 5251  wf 6026  cfv 6030  (class class class)co 6796  cmpt2 6798  Basecbs 16064  +gcplusg 16149  +𝑓cplusf 17447
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1870  ax-4 1885  ax-5 1991  ax-6 2057  ax-7 2093  ax-8 2147  ax-9 2154  ax-10 2174  ax-11 2190  ax-12 2203  ax-13 2408  ax-ext 2751  ax-sep 4916  ax-nul 4924  ax-pow 4975  ax-pr 5035  ax-un 7100
This theorem depends on definitions:  df-bi 197  df-an 383  df-or 837  df-3an 1073  df-tru 1634  df-ex 1853  df-nf 1858  df-sb 2050  df-eu 2622  df-mo 2623  df-clab 2758  df-cleq 2764  df-clel 2767  df-nfc 2902  df-ne 2944  df-ral 3066  df-rex 3067  df-rab 3070  df-v 3353  df-sbc 3588  df-csb 3683  df-dif 3726  df-un 3728  df-in 3730  df-ss 3737  df-nul 4064  df-if 4227  df-pw 4300  df-sn 4318  df-pr 4320  df-op 4324  df-uni 4576  df-iun 4657  df-br 4788  df-opab 4848  df-mpt 4865  df-id 5158  df-xp 5256  df-rel 5257  df-cnv 5258  df-co 5259  df-dm 5260  df-rn 5261  df-res 5262  df-ima 5263  df-iota 5993  df-fun 6032  df-fn 6033  df-f 6034  df-fv 6038  df-ov 6799  df-oprab 6800  df-mpt2 6801  df-1st 7319  df-2nd 7320  df-plusf 17449
This theorem is referenced by:  plusfval  17456  plusfeq  17457  plusffn  17458  mgmplusf  17459  rlmscaf  19423  istgp2  22115  oppgtmd  22121  submtmd  22128  prdstmdd  22147  ressplusf  29990  pl1cn  30341
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