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Theorem fvtp1 7193
Description: The first value of a function with a domain of three elements. (Contributed by NM, 14-Sep-2011.)
Hypotheses
Ref Expression
fvtp1.1 𝐴 ∈ V
fvtp1.4 𝐷 ∈ V
Assertion
Ref Expression
fvtp1 ((𝐴𝐵𝐴𝐶) → ({⟨𝐴, 𝐷⟩, ⟨𝐵, 𝐸⟩, ⟨𝐶, 𝐹⟩}‘𝐴) = 𝐷)

Proof of Theorem fvtp1
StepHypRef Expression
1 df-tp 4594 . . 3 {⟨𝐴, 𝐷⟩, ⟨𝐵, 𝐸⟩, ⟨𝐶, 𝐹⟩} = ({⟨𝐴, 𝐷⟩, ⟨𝐵, 𝐸⟩} ∪ {⟨𝐶, 𝐹⟩})
21fveq1i 6882 . 2 ({⟨𝐴, 𝐷⟩, ⟨𝐵, 𝐸⟩, ⟨𝐶, 𝐹⟩}‘𝐴) = (({⟨𝐴, 𝐷⟩, ⟨𝐵, 𝐸⟩} ∪ {⟨𝐶, 𝐹⟩})‘𝐴)
3 necom 3011 . . . 4 (𝐴𝐶𝐶𝐴)
4 fvunsn 7177 . . . 4 (𝐶𝐴 → (({⟨𝐴, 𝐷⟩, ⟨𝐵, 𝐸⟩} ∪ {⟨𝐶, 𝐹⟩})‘𝐴) = ({⟨𝐴, 𝐷⟩, ⟨𝐵, 𝐸⟩}‘𝐴))
53, 4sylbi 220 . . 3 (𝐴𝐶 → (({⟨𝐴, 𝐷⟩, ⟨𝐵, 𝐸⟩} ∪ {⟨𝐶, 𝐹⟩})‘𝐴) = ({⟨𝐴, 𝐷⟩, ⟨𝐵, 𝐸⟩}‘𝐴))
6 fvtp1.1 . . . 4 𝐴 ∈ V
7 fvtp1.4 . . . 4 𝐷 ∈ V
86, 7fvpr1 7190 . . 3 (𝐴𝐵 → ({⟨𝐴, 𝐷⟩, ⟨𝐵, 𝐸⟩}‘𝐴) = 𝐷)
95, 8sylan9eqr 2820 . 2 ((𝐴𝐵𝐴𝐶) → (({⟨𝐴, 𝐷⟩, ⟨𝐵, 𝐸⟩} ∪ {⟨𝐶, 𝐹⟩})‘𝐴) = 𝐷)
102, 9eqtrid 2810 1 ((𝐴𝐵𝐴𝐶) → ({⟨𝐴, 𝐷⟩, ⟨𝐵, 𝐸⟩, ⟨𝐶, 𝐹⟩}‘𝐴) = 𝐷)
Colors of variables: wff setvar class
Syntax hints:  wi 4  wa 400   = wceq 1570  wcel 2143  wne 2958  Vcvv 3455  cun 3903  {csn 4589  {cpr 4591  {ctp 4593  cop 4595  cfv 6536
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1825  ax-4 1839  ax-5 1940  ax-6 1997  ax-7 2038  ax-8 2145  ax-9 2153  ax-10 2176  ax-12 2213  ax-ext 2735  ax-sep 5257  ax-nul 5269  ax-pr 5404
This theorem depends on definitions:  df-bi 210  df-an 401  df-or 861  df-3an 1105  df-tru 1573  df-fal 1583  df-ex 1810  df-nf 1814  df-sb 2097  df-mo 2567  df-eu 2597  df-clab 2742  df-cleq 2755  df-clel 2838  df-ne 2959  df-ral 3080  df-rex 3090  df-rab 3417  df-v 3457  df-dif 3908  df-un 3910  df-in 3912  df-ss 3922  df-nul 4287  df-if 4488  df-sn 4590  df-pr 4592  df-tp 4594  df-op 4596  df-uni 4873  df-br 5110  df-opab 5174  df-id 5556  df-xp 5667  df-rel 5668  df-cnv 5669  df-co 5670  df-dm 5671  df-res 5673  df-iota 6492  df-fun 6538  df-fv 6544
This theorem is referenced by:  fvtp2  7194  fntpb  7207  rabren3dioph  43542  nnsum4primesodd  48561  nnsum4primesoddALTV  48562
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