MPE Home Metamath Proof Explorer < Previous   Next >
Nearby theorems
Mirrors  >  Home  >  MPE Home  >  Th. List  >  grpodivfval Structured version   Visualization version   GIF version

Theorem grpodivfval 28471
Description: Group division (or subtraction) operation. (Contributed by NM, 15-Feb-2008.) (Revised by Mario Carneiro, 15-Dec-2013.) (New usage is discouraged.)
Hypotheses
Ref Expression
grpdiv.1 𝑋 = ran 𝐺
grpdiv.2 𝑁 = (inv‘𝐺)
grpdiv.3 𝐷 = ( /𝑔𝐺)
Assertion
Ref Expression
grpodivfval (𝐺 ∈ GrpOp → 𝐷 = (𝑥𝑋, 𝑦𝑋 ↦ (𝑥𝐺(𝑁𝑦))))
Distinct variable groups:   𝑥,𝑦,𝐺   𝑥,𝑁,𝑦   𝑥,𝑋,𝑦
Allowed substitution hints:   𝐷(𝑥,𝑦)

Proof of Theorem grpodivfval
Dummy variable 𝑔 is distinct from all other variables.
StepHypRef Expression
1 grpdiv.3 . 2 𝐷 = ( /𝑔𝐺)
2 grpdiv.1 . . . . 5 𝑋 = ran 𝐺
3 rnexg 7637 . . . . 5 (𝐺 ∈ GrpOp → ran 𝐺 ∈ V)
42, 3eqeltrid 2837 . . . 4 (𝐺 ∈ GrpOp → 𝑋 ∈ V)
5 mpoexga 7803 . . . 4 ((𝑋 ∈ V ∧ 𝑋 ∈ V) → (𝑥𝑋, 𝑦𝑋 ↦ (𝑥𝐺(𝑁𝑦))) ∈ V)
64, 4, 5syl2anc 587 . . 3 (𝐺 ∈ GrpOp → (𝑥𝑋, 𝑦𝑋 ↦ (𝑥𝐺(𝑁𝑦))) ∈ V)
7 rneq 5779 . . . . . 6 (𝑔 = 𝐺 → ran 𝑔 = ran 𝐺)
87, 2eqtr4di 2791 . . . . 5 (𝑔 = 𝐺 → ran 𝑔 = 𝑋)
9 id 22 . . . . . 6 (𝑔 = 𝐺𝑔 = 𝐺)
10 eqidd 2739 . . . . . 6 (𝑔 = 𝐺𝑥 = 𝑥)
11 fveq2 6676 . . . . . . . 8 (𝑔 = 𝐺 → (inv‘𝑔) = (inv‘𝐺))
12 grpdiv.2 . . . . . . . 8 𝑁 = (inv‘𝐺)
1311, 12eqtr4di 2791 . . . . . . 7 (𝑔 = 𝐺 → (inv‘𝑔) = 𝑁)
1413fveq1d 6678 . . . . . 6 (𝑔 = 𝐺 → ((inv‘𝑔)‘𝑦) = (𝑁𝑦))
159, 10, 14oveq123d 7193 . . . . 5 (𝑔 = 𝐺 → (𝑥𝑔((inv‘𝑔)‘𝑦)) = (𝑥𝐺(𝑁𝑦)))
168, 8, 15mpoeq123dv 7245 . . . 4 (𝑔 = 𝐺 → (𝑥 ∈ ran 𝑔, 𝑦 ∈ ran 𝑔 ↦ (𝑥𝑔((inv‘𝑔)‘𝑦))) = (𝑥𝑋, 𝑦𝑋 ↦ (𝑥𝐺(𝑁𝑦))))
17 df-gdiv 28433 . . . 4 /𝑔 = (𝑔 ∈ GrpOp ↦ (𝑥 ∈ ran 𝑔, 𝑦 ∈ ran 𝑔 ↦ (𝑥𝑔((inv‘𝑔)‘𝑦))))
1816, 17fvmptg 6775 . . 3 ((𝐺 ∈ GrpOp ∧ (𝑥𝑋, 𝑦𝑋 ↦ (𝑥𝐺(𝑁𝑦))) ∈ V) → ( /𝑔𝐺) = (𝑥𝑋, 𝑦𝑋 ↦ (𝑥𝐺(𝑁𝑦))))
196, 18mpdan 687 . 2 (𝐺 ∈ GrpOp → ( /𝑔𝐺) = (𝑥𝑋, 𝑦𝑋 ↦ (𝑥𝐺(𝑁𝑦))))
201, 19syl5eq 2785 1 (𝐺 ∈ GrpOp → 𝐷 = (𝑥𝑋, 𝑦𝑋 ↦ (𝑥𝐺(𝑁𝑦))))
Colors of variables: wff setvar class
Syntax hints:  wi 4   = wceq 1542  wcel 2114  Vcvv 3398  ran crn 5526  cfv 6339  (class class class)co 7172  cmpo 7174  GrpOpcgr 28426  invcgn 28428   /𝑔 cgs 28429
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1802  ax-4 1816  ax-5 1917  ax-6 1975  ax-7 2020  ax-8 2116  ax-9 2124  ax-10 2145  ax-11 2162  ax-12 2179  ax-ext 2710  ax-rep 5154  ax-sep 5167  ax-nul 5174  ax-pow 5232  ax-pr 5296  ax-un 7481
This theorem depends on definitions:  df-bi 210  df-an 400  df-or 847  df-3an 1090  df-tru 1545  df-fal 1555  df-ex 1787  df-nf 1791  df-sb 2075  df-mo 2540  df-eu 2570  df-clab 2717  df-cleq 2730  df-clel 2811  df-nfc 2881  df-ne 2935  df-ral 3058  df-rex 3059  df-reu 3060  df-rab 3062  df-v 3400  df-sbc 3681  df-csb 3791  df-dif 3846  df-un 3848  df-in 3850  df-ss 3860  df-nul 4212  df-if 4415  df-pw 4490  df-sn 4517  df-pr 4519  df-op 4523  df-uni 4797  df-iun 4883  df-br 5031  df-opab 5093  df-mpt 5111  df-id 5429  df-xp 5531  df-rel 5532  df-cnv 5533  df-co 5534  df-dm 5535  df-rn 5536  df-res 5537  df-ima 5538  df-iota 6297  df-fun 6341  df-fn 6342  df-f 6343  df-f1 6344  df-fo 6345  df-f1o 6346  df-fv 6347  df-ov 7175  df-oprab 7176  df-mpo 7177  df-1st 7716  df-2nd 7717  df-gdiv 28433
This theorem is referenced by:  grpodivval  28472  grpodivf  28475  nvmfval  28581
  Copyright terms: Public domain W3C validator