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Theorem iinfssclem3 49181
Description: Lemma for iinfssc 49182. (Contributed by Zhi Wang, 31-Oct-2025.)
Hypotheses
Ref Expression
iinfssc.1 (𝜑𝐴 ≠ ∅)
iinfssc.2 ((𝜑𝑥𝐴) → 𝐻cat 𝐽)
iinfssc.3 (𝜑𝐾 = (𝑦 𝑥𝐴 dom 𝐻 𝑥𝐴 (𝐻𝑦)))
iinfssclem1.4 ((𝜑𝑥𝐴) → 𝑆 = dom dom 𝐻)
iinfssclem1.5 𝑥𝜑
iinfssclem3.x (𝜑𝑋 𝑥𝐴 𝑆)
iinfssclem3.y (𝜑𝑌 𝑥𝐴 𝑆)
Assertion
Ref Expression
iinfssclem3 (𝜑 → (𝑋𝐾𝑌) = 𝑥𝐴 (𝑋𝐻𝑌))
Distinct variable groups:   𝑥,𝐴,𝑦   𝑦,𝐻   𝑦,𝑆   𝑥,𝑋   𝑥,𝑌
Allowed substitution hints:   𝜑(𝑥,𝑦)   𝑆(𝑥)   𝐻(𝑥)   𝐽(𝑥,𝑦)   𝐾(𝑥,𝑦)   𝑋(𝑦)   𝑌(𝑦)

Proof of Theorem iinfssclem3
Dummy variables 𝑤 𝑧 are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 iinfssc.1 . . 3 (𝜑𝐴 ≠ ∅)
2 iinfssc.2 . . 3 ((𝜑𝑥𝐴) → 𝐻cat 𝐽)
3 iinfssc.3 . . 3 (𝜑𝐾 = (𝑦 𝑥𝐴 dom 𝐻 𝑥𝐴 (𝐻𝑦)))
4 iinfssclem1.4 . . 3 ((𝜑𝑥𝐴) → 𝑆 = dom dom 𝐻)
5 iinfssclem1.5 . . 3 𝑥𝜑
61, 2, 3, 4, 5iinfssclem1 49179 . 2 (𝜑𝐾 = (𝑧 𝑥𝐴 𝑆, 𝑤 𝑥𝐴 𝑆 𝑥𝐴 (𝑧𝐻𝑤)))
7 nfv 1915 . . . 4 𝑥(𝑧 = 𝑋𝑤 = 𝑌)
85, 7nfan 1900 . . 3 𝑥(𝜑 ∧ (𝑧 = 𝑋𝑤 = 𝑌))
9 simplrl 776 . . . 4 (((𝜑 ∧ (𝑧 = 𝑋𝑤 = 𝑌)) ∧ 𝑥𝐴) → 𝑧 = 𝑋)
10 simplrr 777 . . . 4 (((𝜑 ∧ (𝑧 = 𝑋𝑤 = 𝑌)) ∧ 𝑥𝐴) → 𝑤 = 𝑌)
119, 10oveq12d 7370 . . 3 (((𝜑 ∧ (𝑧 = 𝑋𝑤 = 𝑌)) ∧ 𝑥𝐴) → (𝑧𝐻𝑤) = (𝑋𝐻𝑌))
128, 11iineq2d 4965 . 2 ((𝜑 ∧ (𝑧 = 𝑋𝑤 = 𝑌)) → 𝑥𝐴 (𝑧𝐻𝑤) = 𝑥𝐴 (𝑋𝐻𝑌))
13 iinfssclem3.x . 2 (𝜑𝑋 𝑥𝐴 𝑆)
14 iinfssclem3.y . 2 (𝜑𝑌 𝑥𝐴 𝑆)
15 ovex 7385 . . . 4 (𝑋𝐻𝑌) ∈ V
1615rgenw 3052 . . 3 𝑥𝐴 (𝑋𝐻𝑌) ∈ V
17 iinexg 5288 . . 3 ((𝐴 ≠ ∅ ∧ ∀𝑥𝐴 (𝑋𝐻𝑌) ∈ V) → 𝑥𝐴 (𝑋𝐻𝑌) ∈ V)
181, 16, 17sylancl 586 . 2 (𝜑 𝑥𝐴 (𝑋𝐻𝑌) ∈ V)
196, 12, 13, 14, 18ovmpod 7504 1 (𝜑 → (𝑋𝐾𝑌) = 𝑥𝐴 (𝑋𝐻𝑌))
Colors of variables: wff setvar class
Syntax hints:  wi 4  wa 395   = wceq 1541  wnf 1784  wcel 2113  wne 2929  wral 3048  Vcvv 3437  c0 4282   ciin 4942   class class class wbr 5093  cmpt 5174  dom cdm 5619  cfv 6486  (class class class)co 7352  cat cssc 17716
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-rep 5219  ax-sep 5236  ax-nul 5246  ax-pow 5305  ax-pr 5372  ax-un 7674
This theorem depends on definitions:  df-bi 207  df-an 396  df-or 848  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-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-nul 4283  df-if 4475  df-pw 4551  df-sn 4576  df-pr 4578  df-op 4582  df-uni 4859  df-int 4898  df-iun 4943  df-iin 4944  df-br 5094  df-opab 5156  df-mpt 5175  df-id 5514  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-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-ixp 8828  df-ssc 17719
This theorem is referenced by:  iinfsubc  49183
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