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Theorem offval22 7253
Description: The function operation expressed as a mapping, variation of offval2 6914. (Contributed by SO, 15-Jul-2018.)
Hypotheses
Ref Expression
offval22.a (𝜑𝐴𝑉)
offval22.b (𝜑𝐵𝑊)
offval22.c ((𝜑𝑥𝐴𝑦𝐵) → 𝐶𝑋)
offval22.d ((𝜑𝑥𝐴𝑦𝐵) → 𝐷𝑌)
offval22.f (𝜑𝐹 = (𝑥𝐴, 𝑦𝐵𝐶))
offval22.g (𝜑𝐺 = (𝑥𝐴, 𝑦𝐵𝐷))
Assertion
Ref Expression
offval22 (𝜑 → (𝐹𝑓 𝑅𝐺) = (𝑥𝐴, 𝑦𝐵 ↦ (𝐶𝑅𝐷)))
Distinct variable groups:   𝜑,𝑥,𝑦   𝑥,𝐴,𝑦   𝑥,𝐵,𝑦   𝑥,𝑅,𝑦
Allowed substitution hints:   𝐶(𝑥,𝑦)   𝐷(𝑥,𝑦)   𝐹(𝑥,𝑦)   𝐺(𝑥,𝑦)   𝑉(𝑥,𝑦)   𝑊(𝑥,𝑦)   𝑋(𝑥,𝑦)   𝑌(𝑥,𝑦)

Proof of Theorem offval22
Dummy variable 𝑧 is distinct from all other variables.
StepHypRef Expression
1 offval22.a . . . 4 (𝜑𝐴𝑉)
2 offval22.b . . . 4 (𝜑𝐵𝑊)
3 xpexg 6960 . . . 4 ((𝐴𝑉𝐵𝑊) → (𝐴 × 𝐵) ∈ V)
41, 2, 3syl2anc 693 . . 3 (𝜑 → (𝐴 × 𝐵) ∈ V)
5 xp1st 7198 . . . . 5 (𝑧 ∈ (𝐴 × 𝐵) → (1st𝑧) ∈ 𝐴)
6 xp2nd 7199 . . . . 5 (𝑧 ∈ (𝐴 × 𝐵) → (2nd𝑧) ∈ 𝐵)
75, 6jca 554 . . . 4 (𝑧 ∈ (𝐴 × 𝐵) → ((1st𝑧) ∈ 𝐴 ∧ (2nd𝑧) ∈ 𝐵))
8 fvex 6201 . . . . . 6 (2nd𝑧) ∈ V
9 fvex 6201 . . . . . 6 (1st𝑧) ∈ V
10 nfcv 2764 . . . . . . 7 𝑦(2nd𝑧)
11 nfcv 2764 . . . . . . 7 𝑥(2nd𝑧)
12 nfcv 2764 . . . . . . 7 𝑥(1st𝑧)
13 nfv 1843 . . . . . . . 8 𝑦(𝜑𝑥𝐴 ∧ (2nd𝑧) ∈ 𝐵)
14 nfcsb1v 3549 . . . . . . . . 9 𝑦(2nd𝑧) / 𝑦𝐶
1514nfel1 2779 . . . . . . . 8 𝑦(2nd𝑧) / 𝑦𝐶 ∈ V
1613, 15nfim 1825 . . . . . . 7 𝑦((𝜑𝑥𝐴 ∧ (2nd𝑧) ∈ 𝐵) → (2nd𝑧) / 𝑦𝐶 ∈ V)
17 nfv 1843 . . . . . . . 8 𝑥(𝜑 ∧ (1st𝑧) ∈ 𝐴 ∧ (2nd𝑧) ∈ 𝐵)
18 nfcsb1v 3549 . . . . . . . . 9 𝑥(1st𝑧) / 𝑥(2nd𝑧) / 𝑦𝐶
1918nfel1 2779 . . . . . . . 8 𝑥(1st𝑧) / 𝑥(2nd𝑧) / 𝑦𝐶 ∈ V
2017, 19nfim 1825 . . . . . . 7 𝑥((𝜑 ∧ (1st𝑧) ∈ 𝐴 ∧ (2nd𝑧) ∈ 𝐵) → (1st𝑧) / 𝑥(2nd𝑧) / 𝑦𝐶 ∈ V)
21 eleq1 2689 . . . . . . . . 9 (𝑦 = (2nd𝑧) → (𝑦𝐵 ↔ (2nd𝑧) ∈ 𝐵))
22213anbi3d 1405 . . . . . . . 8 (𝑦 = (2nd𝑧) → ((𝜑𝑥𝐴𝑦𝐵) ↔ (𝜑𝑥𝐴 ∧ (2nd𝑧) ∈ 𝐵)))
23 csbeq1a 3542 . . . . . . . . 9 (𝑦 = (2nd𝑧) → 𝐶 = (2nd𝑧) / 𝑦𝐶)
2423eleq1d 2686 . . . . . . . 8 (𝑦 = (2nd𝑧) → (𝐶 ∈ V ↔ (2nd𝑧) / 𝑦𝐶 ∈ V))
2522, 24imbi12d 334 . . . . . . 7 (𝑦 = (2nd𝑧) → (((𝜑𝑥𝐴𝑦𝐵) → 𝐶 ∈ V) ↔ ((𝜑𝑥𝐴 ∧ (2nd𝑧) ∈ 𝐵) → (2nd𝑧) / 𝑦𝐶 ∈ V)))
26 eleq1 2689 . . . . . . . . 9 (𝑥 = (1st𝑧) → (𝑥𝐴 ↔ (1st𝑧) ∈ 𝐴))
27263anbi2d 1404 . . . . . . . 8 (𝑥 = (1st𝑧) → ((𝜑𝑥𝐴 ∧ (2nd𝑧) ∈ 𝐵) ↔ (𝜑 ∧ (1st𝑧) ∈ 𝐴 ∧ (2nd𝑧) ∈ 𝐵)))
28 csbeq1a 3542 . . . . . . . . 9 (𝑥 = (1st𝑧) → (2nd𝑧) / 𝑦𝐶 = (1st𝑧) / 𝑥(2nd𝑧) / 𝑦𝐶)
2928eleq1d 2686 . . . . . . . 8 (𝑥 = (1st𝑧) → ((2nd𝑧) / 𝑦𝐶 ∈ V ↔ (1st𝑧) / 𝑥(2nd𝑧) / 𝑦𝐶 ∈ V))
3027, 29imbi12d 334 . . . . . . 7 (𝑥 = (1st𝑧) → (((𝜑𝑥𝐴 ∧ (2nd𝑧) ∈ 𝐵) → (2nd𝑧) / 𝑦𝐶 ∈ V) ↔ ((𝜑 ∧ (1st𝑧) ∈ 𝐴 ∧ (2nd𝑧) ∈ 𝐵) → (1st𝑧) / 𝑥(2nd𝑧) / 𝑦𝐶 ∈ V)))
31 offval22.c . . . . . . . 8 ((𝜑𝑥𝐴𝑦𝐵) → 𝐶𝑋)
32 elex 3212 . . . . . . . 8 (𝐶𝑋𝐶 ∈ V)
3331, 32syl 17 . . . . . . 7 ((𝜑𝑥𝐴𝑦𝐵) → 𝐶 ∈ V)
3410, 11, 12, 16, 20, 25, 30, 33vtocl2gf 3268 . . . . . 6 (((2nd𝑧) ∈ V ∧ (1st𝑧) ∈ V) → ((𝜑 ∧ (1st𝑧) ∈ 𝐴 ∧ (2nd𝑧) ∈ 𝐵) → (1st𝑧) / 𝑥(2nd𝑧) / 𝑦𝐶 ∈ V))
358, 9, 34mp2an 708 . . . . 5 ((𝜑 ∧ (1st𝑧) ∈ 𝐴 ∧ (2nd𝑧) ∈ 𝐵) → (1st𝑧) / 𝑥(2nd𝑧) / 𝑦𝐶 ∈ V)
36353expb 1266 . . . 4 ((𝜑 ∧ ((1st𝑧) ∈ 𝐴 ∧ (2nd𝑧) ∈ 𝐵)) → (1st𝑧) / 𝑥(2nd𝑧) / 𝑦𝐶 ∈ V)
377, 36sylan2 491 . . 3 ((𝜑𝑧 ∈ (𝐴 × 𝐵)) → (1st𝑧) / 𝑥(2nd𝑧) / 𝑦𝐶 ∈ V)
38 nfcsb1v 3549 . . . . . . . . 9 𝑦(2nd𝑧) / 𝑦𝐷
3938nfel1 2779 . . . . . . . 8 𝑦(2nd𝑧) / 𝑦𝐷 ∈ V
4013, 39nfim 1825 . . . . . . 7 𝑦((𝜑𝑥𝐴 ∧ (2nd𝑧) ∈ 𝐵) → (2nd𝑧) / 𝑦𝐷 ∈ V)
41 nfcsb1v 3549 . . . . . . . . 9 𝑥(1st𝑧) / 𝑥(2nd𝑧) / 𝑦𝐷
4241nfel1 2779 . . . . . . . 8 𝑥(1st𝑧) / 𝑥(2nd𝑧) / 𝑦𝐷 ∈ V
4317, 42nfim 1825 . . . . . . 7 𝑥((𝜑 ∧ (1st𝑧) ∈ 𝐴 ∧ (2nd𝑧) ∈ 𝐵) → (1st𝑧) / 𝑥(2nd𝑧) / 𝑦𝐷 ∈ V)
44 csbeq1a 3542 . . . . . . . . 9 (𝑦 = (2nd𝑧) → 𝐷 = (2nd𝑧) / 𝑦𝐷)
4544eleq1d 2686 . . . . . . . 8 (𝑦 = (2nd𝑧) → (𝐷 ∈ V ↔ (2nd𝑧) / 𝑦𝐷 ∈ V))
4622, 45imbi12d 334 . . . . . . 7 (𝑦 = (2nd𝑧) → (((𝜑𝑥𝐴𝑦𝐵) → 𝐷 ∈ V) ↔ ((𝜑𝑥𝐴 ∧ (2nd𝑧) ∈ 𝐵) → (2nd𝑧) / 𝑦𝐷 ∈ V)))
47 csbeq1a 3542 . . . . . . . . 9 (𝑥 = (1st𝑧) → (2nd𝑧) / 𝑦𝐷 = (1st𝑧) / 𝑥(2nd𝑧) / 𝑦𝐷)
4847eleq1d 2686 . . . . . . . 8 (𝑥 = (1st𝑧) → ((2nd𝑧) / 𝑦𝐷 ∈ V ↔ (1st𝑧) / 𝑥(2nd𝑧) / 𝑦𝐷 ∈ V))
4927, 48imbi12d 334 . . . . . . 7 (𝑥 = (1st𝑧) → (((𝜑𝑥𝐴 ∧ (2nd𝑧) ∈ 𝐵) → (2nd𝑧) / 𝑦𝐷 ∈ V) ↔ ((𝜑 ∧ (1st𝑧) ∈ 𝐴 ∧ (2nd𝑧) ∈ 𝐵) → (1st𝑧) / 𝑥(2nd𝑧) / 𝑦𝐷 ∈ V)))
50 offval22.d . . . . . . . 8 ((𝜑𝑥𝐴𝑦𝐵) → 𝐷𝑌)
51 elex 3212 . . . . . . . 8 (𝐷𝑌𝐷 ∈ V)
5250, 51syl 17 . . . . . . 7 ((𝜑𝑥𝐴𝑦𝐵) → 𝐷 ∈ V)
5310, 11, 12, 40, 43, 46, 49, 52vtocl2gf 3268 . . . . . 6 (((2nd𝑧) ∈ V ∧ (1st𝑧) ∈ V) → ((𝜑 ∧ (1st𝑧) ∈ 𝐴 ∧ (2nd𝑧) ∈ 𝐵) → (1st𝑧) / 𝑥(2nd𝑧) / 𝑦𝐷 ∈ V))
548, 9, 53mp2an 708 . . . . 5 ((𝜑 ∧ (1st𝑧) ∈ 𝐴 ∧ (2nd𝑧) ∈ 𝐵) → (1st𝑧) / 𝑥(2nd𝑧) / 𝑦𝐷 ∈ V)
55543expb 1266 . . . 4 ((𝜑 ∧ ((1st𝑧) ∈ 𝐴 ∧ (2nd𝑧) ∈ 𝐵)) → (1st𝑧) / 𝑥(2nd𝑧) / 𝑦𝐷 ∈ V)
567, 55sylan2 491 . . 3 ((𝜑𝑧 ∈ (𝐴 × 𝐵)) → (1st𝑧) / 𝑥(2nd𝑧) / 𝑦𝐷 ∈ V)
57 offval22.f . . . 4 (𝜑𝐹 = (𝑥𝐴, 𝑦𝐵𝐶))
58 mpt2mpts 7234 . . . 4 (𝑥𝐴, 𝑦𝐵𝐶) = (𝑧 ∈ (𝐴 × 𝐵) ↦ (1st𝑧) / 𝑥(2nd𝑧) / 𝑦𝐶)
5957, 58syl6eq 2672 . . 3 (𝜑𝐹 = (𝑧 ∈ (𝐴 × 𝐵) ↦ (1st𝑧) / 𝑥(2nd𝑧) / 𝑦𝐶))
60 offval22.g . . . 4 (𝜑𝐺 = (𝑥𝐴, 𝑦𝐵𝐷))
61 mpt2mpts 7234 . . . 4 (𝑥𝐴, 𝑦𝐵𝐷) = (𝑧 ∈ (𝐴 × 𝐵) ↦ (1st𝑧) / 𝑥(2nd𝑧) / 𝑦𝐷)
6260, 61syl6eq 2672 . . 3 (𝜑𝐺 = (𝑧 ∈ (𝐴 × 𝐵) ↦ (1st𝑧) / 𝑥(2nd𝑧) / 𝑦𝐷))
634, 37, 56, 59, 62offval2 6914 . 2 (𝜑 → (𝐹𝑓 𝑅𝐺) = (𝑧 ∈ (𝐴 × 𝐵) ↦ ((1st𝑧) / 𝑥(2nd𝑧) / 𝑦𝐶𝑅(1st𝑧) / 𝑥(2nd𝑧) / 𝑦𝐷)))
64 csbov12g 6689 . . . . . . 7 ((2nd𝑧) ∈ V → (2nd𝑧) / 𝑦(𝐶𝑅𝐷) = ((2nd𝑧) / 𝑦𝐶𝑅(2nd𝑧) / 𝑦𝐷))
6564csbeq2dv 3992 . . . . . 6 ((2nd𝑧) ∈ V → (1st𝑧) / 𝑥(2nd𝑧) / 𝑦(𝐶𝑅𝐷) = (1st𝑧) / 𝑥((2nd𝑧) / 𝑦𝐶𝑅(2nd𝑧) / 𝑦𝐷))
668, 65ax-mp 5 . . . . 5 (1st𝑧) / 𝑥(2nd𝑧) / 𝑦(𝐶𝑅𝐷) = (1st𝑧) / 𝑥((2nd𝑧) / 𝑦𝐶𝑅(2nd𝑧) / 𝑦𝐷)
67 csbov12g 6689 . . . . . 6 ((1st𝑧) ∈ V → (1st𝑧) / 𝑥((2nd𝑧) / 𝑦𝐶𝑅(2nd𝑧) / 𝑦𝐷) = ((1st𝑧) / 𝑥(2nd𝑧) / 𝑦𝐶𝑅(1st𝑧) / 𝑥(2nd𝑧) / 𝑦𝐷))
689, 67ax-mp 5 . . . . 5 (1st𝑧) / 𝑥((2nd𝑧) / 𝑦𝐶𝑅(2nd𝑧) / 𝑦𝐷) = ((1st𝑧) / 𝑥(2nd𝑧) / 𝑦𝐶𝑅(1st𝑧) / 𝑥(2nd𝑧) / 𝑦𝐷)
6966, 68eqtr2i 2645 . . . 4 ((1st𝑧) / 𝑥(2nd𝑧) / 𝑦𝐶𝑅(1st𝑧) / 𝑥(2nd𝑧) / 𝑦𝐷) = (1st𝑧) / 𝑥(2nd𝑧) / 𝑦(𝐶𝑅𝐷)
7069mpteq2i 4741 . . 3 (𝑧 ∈ (𝐴 × 𝐵) ↦ ((1st𝑧) / 𝑥(2nd𝑧) / 𝑦𝐶𝑅(1st𝑧) / 𝑥(2nd𝑧) / 𝑦𝐷)) = (𝑧 ∈ (𝐴 × 𝐵) ↦ (1st𝑧) / 𝑥(2nd𝑧) / 𝑦(𝐶𝑅𝐷))
71 mpt2mpts 7234 . . 3 (𝑥𝐴, 𝑦𝐵 ↦ (𝐶𝑅𝐷)) = (𝑧 ∈ (𝐴 × 𝐵) ↦ (1st𝑧) / 𝑥(2nd𝑧) / 𝑦(𝐶𝑅𝐷))
7270, 71eqtr4i 2647 . 2 (𝑧 ∈ (𝐴 × 𝐵) ↦ ((1st𝑧) / 𝑥(2nd𝑧) / 𝑦𝐶𝑅(1st𝑧) / 𝑥(2nd𝑧) / 𝑦𝐷)) = (𝑥𝐴, 𝑦𝐵 ↦ (𝐶𝑅𝐷))
7363, 72syl6eq 2672 1 (𝜑 → (𝐹𝑓 𝑅𝐺) = (𝑥𝐴, 𝑦𝐵 ↦ (𝐶𝑅𝐷)))
Colors of variables: wff setvar class
Syntax hints:  wi 4  wa 384  w3a 1037   = wceq 1483  wcel 1990  Vcvv 3200  csb 3533  cmpt 4729   × cxp 5112  cfv 5888  (class class class)co 6650  cmpt2 6652  𝑓 cof 6895  1st c1st 7166  2nd c2nd 7167
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1722  ax-4 1737  ax-5 1839  ax-6 1888  ax-7 1935  ax-8 1992  ax-9 1999  ax-10 2019  ax-11 2034  ax-12 2047  ax-13 2246  ax-ext 2602  ax-rep 4771  ax-sep 4781  ax-nul 4789  ax-pow 4843  ax-pr 4906  ax-un 6949
This theorem depends on definitions:  df-bi 197  df-or 385  df-an 386  df-3an 1039  df-tru 1486  df-fal 1489  df-ex 1705  df-nf 1710  df-sb 1881  df-eu 2474  df-mo 2475  df-clab 2609  df-cleq 2615  df-clel 2618  df-nfc 2753  df-ne 2795  df-ral 2917  df-rex 2918  df-reu 2919  df-rab 2921  df-v 3202  df-sbc 3436  df-csb 3534  df-dif 3577  df-un 3579  df-in 3581  df-ss 3588  df-nul 3916  df-if 4087  df-pw 4160  df-sn 4178  df-pr 4180  df-op 4184  df-uni 4437  df-iun 4522  df-br 4654  df-opab 4713  df-mpt 4730  df-id 5024  df-xp 5120  df-rel 5121  df-cnv 5122  df-co 5123  df-dm 5124  df-rn 5125  df-res 5126  df-ima 5127  df-iota 5851  df-fun 5890  df-fn 5891  df-f 5892  df-f1 5893  df-fo 5894  df-f1o 5895  df-fv 5896  df-ov 6653  df-oprab 6654  df-mpt2 6655  df-of 6897  df-1st 7168  df-2nd 7169
This theorem is referenced by:  matsc  20256  mdetrsca2  20410  mdetrlin2  20413  mdetunilem5  20422  smadiadetglem2  20478  mat2pmatghm  20535  pm2mpghm  20621
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