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Theorem setsabsd 13374
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 13373 . . . 4 ((𝑆𝑉𝐴𝑊𝐵𝑋) → ((𝑆 sSet ⟨𝐴, 𝐵⟩) ↾ (V ∖ {𝐴})) = (𝑆 ↾ (V ∖ {𝐴})))
51, 2, 3, 4syl3anc 1278 . . 3 (𝜑 → ((𝑆 sSet ⟨𝐴, 𝐵⟩) ↾ (V ∖ {𝐴})) = (𝑆 ↾ (V ∖ {𝐴})))
65uneq1d 3382 . 2 (𝜑 → (((𝑆 sSet ⟨𝐴, 𝐵⟩) ↾ (V ∖ {𝐴})) ∪ {⟨𝐴, 𝐶⟩}) = ((𝑆 ↾ (V ∖ {𝐴})) ∪ {⟨𝐴, 𝐶⟩}))
7 setsex 13367 . . . 4 ((𝑆𝑉𝐴𝑊𝐵𝑋) → (𝑆 sSet ⟨𝐴, 𝐵⟩) ∈ V)
81, 2, 3, 7syl3anc 1278 . . 3 (𝜑 → (𝑆 sSet ⟨𝐴, 𝐵⟩) ∈ V)
9 setsabsd.c . . 3 (𝜑𝐶𝑈)
10 setsvala 13366 . . 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 1278 . 2 (𝜑 → ((𝑆 sSet ⟨𝐴, 𝐵⟩) sSet ⟨𝐴, 𝐶⟩) = (((𝑆 sSet ⟨𝐴, 𝐵⟩) ↾ (V ∖ {𝐴})) ∪ {⟨𝐴, 𝐶⟩}))
12 setsvala 13366 . . 3 ((𝑆𝑉𝐴𝑊𝐶𝑈) → (𝑆 sSet ⟨𝐴, 𝐶⟩) = ((𝑆 ↾ (V ∖ {𝐴})) ∪ {⟨𝐴, 𝐶⟩}))
131, 2, 9, 12syl3anc 1278 . 2 (𝜑 → (𝑆 sSet ⟨𝐴, 𝐶⟩) = ((𝑆 ↾ (V ∖ {𝐴})) ∪ {⟨𝐴, 𝐶⟩}))
146, 11, 133eqtr4d 2281 1 (𝜑 → ((𝑆 sSet ⟨𝐴, 𝐵⟩) sSet ⟨𝐴, 𝐶⟩) = (𝑆 sSet ⟨𝐴, 𝐶⟩))
Colors of variables: wff set class
Syntax hints:  wi 4   = wceq 1402  wcel 2209  Vcvv 2821  cdif 3217  cun 3218  {csn 3708  cop 3711  cres 4774  (class class class)co 6079   sSet csts 13333
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 623  ax-in2 624  ax-io 721  ax-5 1500  ax-7 1501  ax-gen 1502  ax-ie1 1546  ax-ie2 1547  ax-8 1557  ax-10 1558  ax-11 1559  ax-i12 1560  ax-bndl 1562  ax-4 1563  ax-17 1579  ax-i9 1583  ax-ial 1587  ax-i5r 1588  ax-14 2212  ax-ext 2220  ax-sep 4247  ax-pow 4309  ax-pr 4344  ax-un 4576  ax-setind 4682
This theorem depends on definitions:  df-bi 117  df-3an 1011  df-tru 1405  df-fal 1408  df-nf 1514  df-sb 1816  df-eu 2089  df-mo 2090  df-clab 2225  df-cleq 2231  df-clel 2234  df-nfc 2381  df-ne 2421  df-ral 2533  df-rex 2534  df-rab 2537  df-v 2823  df-sbc 3052  df-dif 3222  df-un 3224  df-in 3226  df-ss 3233  df-nul 3521  df-pw 3690  df-sn 3714  df-pr 3715  df-op 3717  df-uni 3934  df-br 4129  df-opab 4191  df-id 4436  df-xp 4778  df-rel 4779  df-cnv 4780  df-co 4781  df-dm 4782  df-res 4784  df-iota 5335  df-fun 5377  df-fv 5383  df-ov 6082  df-oprab 6083  df-mpo 6084  df-sets 13342
This theorem is referenced by:  ressressg  13412
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