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Theorem setsabsd 13126
Description: Replacing the same components twice yields the same as the second setting only. (Contributed by Mario Carneiro, 2-Dec-2014.) (Revised by Jim Kingdon, 22-Jan-2023.)
Hypotheses
Ref Expression
setsabsd.s (𝜑𝑆𝑉)
setsabsd.a (𝜑𝐴𝑊)
setsabsd.b (𝜑𝐵𝑋)
setsabsd.c (𝜑𝐶𝑈)
Assertion
Ref Expression
setsabsd (𝜑 → ((𝑆 sSet ⟨𝐴, 𝐵⟩) sSet ⟨𝐴, 𝐶⟩) = (𝑆 sSet ⟨𝐴, 𝐶⟩))

Proof of Theorem setsabsd
StepHypRef Expression
1 setsabsd.s . . . 4 (𝜑𝑆𝑉)
2 setsabsd.a . . . 4 (𝜑𝐴𝑊)
3 setsabsd.b . . . 4 (𝜑𝐵𝑋)
4 setsresg 13125 . . . 4 ((𝑆𝑉𝐴𝑊𝐵𝑋) → ((𝑆 sSet ⟨𝐴, 𝐵⟩) ↾ (V ∖ {𝐴})) = (𝑆 ↾ (V ∖ {𝐴})))
51, 2, 3, 4syl3anc 1273 . . 3 (𝜑 → ((𝑆 sSet ⟨𝐴, 𝐵⟩) ↾ (V ∖ {𝐴})) = (𝑆 ↾ (V ∖ {𝐴})))
65uneq1d 3360 . 2 (𝜑 → (((𝑆 sSet ⟨𝐴, 𝐵⟩) ↾ (V ∖ {𝐴})) ∪ {⟨𝐴, 𝐶⟩}) = ((𝑆 ↾ (V ∖ {𝐴})) ∪ {⟨𝐴, 𝐶⟩}))
7 setsex 13119 . . . 4 ((𝑆𝑉𝐴𝑊𝐵𝑋) → (𝑆 sSet ⟨𝐴, 𝐵⟩) ∈ V)
81, 2, 3, 7syl3anc 1273 . . 3 (𝜑 → (𝑆 sSet ⟨𝐴, 𝐵⟩) ∈ V)
9 setsabsd.c . . 3 (𝜑𝐶𝑈)
10 setsvala 13118 . . 3 (((𝑆 sSet ⟨𝐴, 𝐵⟩) ∈ V ∧ 𝐴𝑊𝐶𝑈) → ((𝑆 sSet ⟨𝐴, 𝐵⟩) sSet ⟨𝐴, 𝐶⟩) = (((𝑆 sSet ⟨𝐴, 𝐵⟩) ↾ (V ∖ {𝐴})) ∪ {⟨𝐴, 𝐶⟩}))
118, 2, 9, 10syl3anc 1273 . 2 (𝜑 → ((𝑆 sSet ⟨𝐴, 𝐵⟩) sSet ⟨𝐴, 𝐶⟩) = (((𝑆 sSet ⟨𝐴, 𝐵⟩) ↾ (V ∖ {𝐴})) ∪ {⟨𝐴, 𝐶⟩}))
12 setsvala 13118 . . 3 ((𝑆𝑉𝐴𝑊𝐶𝑈) → (𝑆 sSet ⟨𝐴, 𝐶⟩) = ((𝑆 ↾ (V ∖ {𝐴})) ∪ {⟨𝐴, 𝐶⟩}))
131, 2, 9, 12syl3anc 1273 . 2 (𝜑 → (𝑆 sSet ⟨𝐴, 𝐶⟩) = ((𝑆 ↾ (V ∖ {𝐴})) ∪ {⟨𝐴, 𝐶⟩}))
146, 11, 133eqtr4d 2274 1 (𝜑 → ((𝑆 sSet ⟨𝐴, 𝐵⟩) sSet ⟨𝐴, 𝐶⟩) = (𝑆 sSet ⟨𝐴, 𝐶⟩))
Colors of variables: wff set class
Syntax hints:  wi 4   = wceq 1397  wcel 2202  Vcvv 2802  cdif 3197  cun 3198  {csn 3669  cop 3672  cres 4727  (class class class)co 6018   sSet csts 13085
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-in1 619  ax-in2 620  ax-io 716  ax-5 1495  ax-7 1496  ax-gen 1497  ax-ie1 1541  ax-ie2 1542  ax-8 1552  ax-10 1553  ax-11 1554  ax-i12 1555  ax-bndl 1557  ax-4 1558  ax-17 1574  ax-i9 1578  ax-ial 1582  ax-i5r 1583  ax-13 2204  ax-14 2205  ax-ext 2213  ax-sep 4207  ax-pow 4264  ax-pr 4299  ax-un 4530  ax-setind 4635
This theorem depends on definitions:  df-bi 117  df-3an 1006  df-tru 1400  df-fal 1403  df-nf 1509  df-sb 1811  df-eu 2082  df-mo 2083  df-clab 2218  df-cleq 2224  df-clel 2227  df-nfc 2363  df-ne 2403  df-ral 2515  df-rex 2516  df-rab 2519  df-v 2804  df-sbc 3032  df-dif 3202  df-un 3204  df-in 3206  df-ss 3213  df-nul 3495  df-pw 3654  df-sn 3675  df-pr 3676  df-op 3678  df-uni 3894  df-br 4089  df-opab 4151  df-id 4390  df-xp 4731  df-rel 4732  df-cnv 4733  df-co 4734  df-dm 4735  df-res 4737  df-iota 5286  df-fun 5328  df-fv 5334  df-ov 6021  df-oprab 6022  df-mpo 6023  df-sets 13094
This theorem is referenced by:  ressressg  13163
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