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Theorem fntpg 6628
Description: Function with a domain of three different values. (Contributed by Alexander van der Vekens, 5-Dec-2017.)
Assertion
Ref Expression
fntpg (((𝑋𝑈𝑌𝑉𝑍𝑊) ∧ (𝐴𝐹𝐵𝐺𝐶𝐻) ∧ (𝑋𝑌𝑋𝑍𝑌𝑍)) → {⟨𝑋, 𝐴⟩, ⟨𝑌, 𝐵⟩, ⟨𝑍, 𝐶⟩} Fn {𝑋, 𝑌, 𝑍})

Proof of Theorem fntpg
StepHypRef Expression
1 funtpg 6623 . 2 (((𝑋𝑈𝑌𝑉𝑍𝑊) ∧ (𝐴𝐹𝐵𝐺𝐶𝐻) ∧ (𝑋𝑌𝑋𝑍𝑌𝑍)) → Fun {⟨𝑋, 𝐴⟩, ⟨𝑌, 𝐵⟩, ⟨𝑍, 𝐶⟩})
2 dmsnopg 6235 . . . . . . . . . 10 (𝐴𝐹 → dom {⟨𝑋, 𝐴⟩} = {𝑋})
323ad2ant1 1132 . . . . . . . . 9 ((𝐴𝐹𝐵𝐺𝐶𝐻) → dom {⟨𝑋, 𝐴⟩} = {𝑋})
4 dmsnopg 6235 . . . . . . . . . 10 (𝐵𝐺 → dom {⟨𝑌, 𝐵⟩} = {𝑌})
543ad2ant2 1133 . . . . . . . . 9 ((𝐴𝐹𝐵𝐺𝐶𝐻) → dom {⟨𝑌, 𝐵⟩} = {𝑌})
63, 5jca 511 . . . . . . . 8 ((𝐴𝐹𝐵𝐺𝐶𝐻) → (dom {⟨𝑋, 𝐴⟩} = {𝑋} ∧ dom {⟨𝑌, 𝐵⟩} = {𝑌}))
763ad2ant2 1133 . . . . . . 7 (((𝑋𝑈𝑌𝑉𝑍𝑊) ∧ (𝐴𝐹𝐵𝐺𝐶𝐻) ∧ (𝑋𝑌𝑋𝑍𝑌𝑍)) → (dom {⟨𝑋, 𝐴⟩} = {𝑋} ∧ dom {⟨𝑌, 𝐵⟩} = {𝑌}))
8 uneq12 4173 . . . . . . 7 ((dom {⟨𝑋, 𝐴⟩} = {𝑋} ∧ dom {⟨𝑌, 𝐵⟩} = {𝑌}) → (dom {⟨𝑋, 𝐴⟩} ∪ dom {⟨𝑌, 𝐵⟩}) = ({𝑋} ∪ {𝑌}))
97, 8syl 17 . . . . . 6 (((𝑋𝑈𝑌𝑉𝑍𝑊) ∧ (𝐴𝐹𝐵𝐺𝐶𝐻) ∧ (𝑋𝑌𝑋𝑍𝑌𝑍)) → (dom {⟨𝑋, 𝐴⟩} ∪ dom {⟨𝑌, 𝐵⟩}) = ({𝑋} ∪ {𝑌}))
10 df-pr 4634 . . . . . 6 {𝑋, 𝑌} = ({𝑋} ∪ {𝑌})
119, 10eqtr4di 2793 . . . . 5 (((𝑋𝑈𝑌𝑉𝑍𝑊) ∧ (𝐴𝐹𝐵𝐺𝐶𝐻) ∧ (𝑋𝑌𝑋𝑍𝑌𝑍)) → (dom {⟨𝑋, 𝐴⟩} ∪ dom {⟨𝑌, 𝐵⟩}) = {𝑋, 𝑌})
12 df-pr 4634 . . . . . . . 8 {⟨𝑋, 𝐴⟩, ⟨𝑌, 𝐵⟩} = ({⟨𝑋, 𝐴⟩} ∪ {⟨𝑌, 𝐵⟩})
1312dmeqi 5918 . . . . . . 7 dom {⟨𝑋, 𝐴⟩, ⟨𝑌, 𝐵⟩} = dom ({⟨𝑋, 𝐴⟩} ∪ {⟨𝑌, 𝐵⟩})
1413eqeq1i 2740 . . . . . 6 (dom {⟨𝑋, 𝐴⟩, ⟨𝑌, 𝐵⟩} = {𝑋, 𝑌} ↔ dom ({⟨𝑋, 𝐴⟩} ∪ {⟨𝑌, 𝐵⟩}) = {𝑋, 𝑌})
15 dmun 5924 . . . . . . 7 dom ({⟨𝑋, 𝐴⟩} ∪ {⟨𝑌, 𝐵⟩}) = (dom {⟨𝑋, 𝐴⟩} ∪ dom {⟨𝑌, 𝐵⟩})
1615eqeq1i 2740 . . . . . 6 (dom ({⟨𝑋, 𝐴⟩} ∪ {⟨𝑌, 𝐵⟩}) = {𝑋, 𝑌} ↔ (dom {⟨𝑋, 𝐴⟩} ∪ dom {⟨𝑌, 𝐵⟩}) = {𝑋, 𝑌})
1714, 16bitri 275 . . . . 5 (dom {⟨𝑋, 𝐴⟩, ⟨𝑌, 𝐵⟩} = {𝑋, 𝑌} ↔ (dom {⟨𝑋, 𝐴⟩} ∪ dom {⟨𝑌, 𝐵⟩}) = {𝑋, 𝑌})
1811, 17sylibr 234 . . . 4 (((𝑋𝑈𝑌𝑉𝑍𝑊) ∧ (𝐴𝐹𝐵𝐺𝐶𝐻) ∧ (𝑋𝑌𝑋𝑍𝑌𝑍)) → dom {⟨𝑋, 𝐴⟩, ⟨𝑌, 𝐵⟩} = {𝑋, 𝑌})
19 dmsnopg 6235 . . . . . 6 (𝐶𝐻 → dom {⟨𝑍, 𝐶⟩} = {𝑍})
20193ad2ant3 1134 . . . . 5 ((𝐴𝐹𝐵𝐺𝐶𝐻) → dom {⟨𝑍, 𝐶⟩} = {𝑍})
21203ad2ant2 1133 . . . 4 (((𝑋𝑈𝑌𝑉𝑍𝑊) ∧ (𝐴𝐹𝐵𝐺𝐶𝐻) ∧ (𝑋𝑌𝑋𝑍𝑌𝑍)) → dom {⟨𝑍, 𝐶⟩} = {𝑍})
2218, 21uneq12d 4179 . . 3 (((𝑋𝑈𝑌𝑉𝑍𝑊) ∧ (𝐴𝐹𝐵𝐺𝐶𝐻) ∧ (𝑋𝑌𝑋𝑍𝑌𝑍)) → (dom {⟨𝑋, 𝐴⟩, ⟨𝑌, 𝐵⟩} ∪ dom {⟨𝑍, 𝐶⟩}) = ({𝑋, 𝑌} ∪ {𝑍}))
23 df-tp 4636 . . . . 5 {⟨𝑋, 𝐴⟩, ⟨𝑌, 𝐵⟩, ⟨𝑍, 𝐶⟩} = ({⟨𝑋, 𝐴⟩, ⟨𝑌, 𝐵⟩} ∪ {⟨𝑍, 𝐶⟩})
2423dmeqi 5918 . . . 4 dom {⟨𝑋, 𝐴⟩, ⟨𝑌, 𝐵⟩, ⟨𝑍, 𝐶⟩} = dom ({⟨𝑋, 𝐴⟩, ⟨𝑌, 𝐵⟩} ∪ {⟨𝑍, 𝐶⟩})
25 dmun 5924 . . . 4 dom ({⟨𝑋, 𝐴⟩, ⟨𝑌, 𝐵⟩} ∪ {⟨𝑍, 𝐶⟩}) = (dom {⟨𝑋, 𝐴⟩, ⟨𝑌, 𝐵⟩} ∪ dom {⟨𝑍, 𝐶⟩})
2624, 25eqtri 2763 . . 3 dom {⟨𝑋, 𝐴⟩, ⟨𝑌, 𝐵⟩, ⟨𝑍, 𝐶⟩} = (dom {⟨𝑋, 𝐴⟩, ⟨𝑌, 𝐵⟩} ∪ dom {⟨𝑍, 𝐶⟩})
27 df-tp 4636 . . 3 {𝑋, 𝑌, 𝑍} = ({𝑋, 𝑌} ∪ {𝑍})
2822, 26, 273eqtr4g 2800 . 2 (((𝑋𝑈𝑌𝑉𝑍𝑊) ∧ (𝐴𝐹𝐵𝐺𝐶𝐻) ∧ (𝑋𝑌𝑋𝑍𝑌𝑍)) → dom {⟨𝑋, 𝐴⟩, ⟨𝑌, 𝐵⟩, ⟨𝑍, 𝐶⟩} = {𝑋, 𝑌, 𝑍})
29 df-fn 6566 . 2 ({⟨𝑋, 𝐴⟩, ⟨𝑌, 𝐵⟩, ⟨𝑍, 𝐶⟩} Fn {𝑋, 𝑌, 𝑍} ↔ (Fun {⟨𝑋, 𝐴⟩, ⟨𝑌, 𝐵⟩, ⟨𝑍, 𝐶⟩} ∧ dom {⟨𝑋, 𝐴⟩, ⟨𝑌, 𝐵⟩, ⟨𝑍, 𝐶⟩} = {𝑋, 𝑌, 𝑍}))
301, 28, 29sylanbrc 583 1 (((𝑋𝑈𝑌𝑉𝑍𝑊) ∧ (𝐴𝐹𝐵𝐺𝐶𝐻) ∧ (𝑋𝑌𝑋𝑍𝑌𝑍)) → {⟨𝑋, 𝐴⟩, ⟨𝑌, 𝐵⟩, ⟨𝑍, 𝐶⟩} Fn {𝑋, 𝑌, 𝑍})
Colors of variables: wff setvar class
Syntax hints:  wi 4  wa 395  w3a 1086   = wceq 1537  wcel 2106  wne 2938  cun 3961  {csn 4631  {cpr 4633  {ctp 4635  cop 4637  dom cdm 5689  Fun wfun 6557   Fn wfn 6558
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1792  ax-4 1806  ax-5 1908  ax-6 1965  ax-7 2005  ax-8 2108  ax-9 2116  ax-10 2139  ax-12 2175  ax-ext 2706  ax-sep 5302  ax-nul 5312  ax-pr 5438
This theorem depends on definitions:  df-bi 207  df-an 396  df-or 848  df-3an 1088  df-tru 1540  df-fal 1550  df-ex 1777  df-nf 1781  df-sb 2063  df-mo 2538  df-clab 2713  df-cleq 2727  df-clel 2814  df-ne 2939  df-ral 3060  df-rex 3069  df-rab 3434  df-v 3480  df-dif 3966  df-un 3968  df-in 3970  df-ss 3980  df-nul 4340  df-if 4532  df-sn 4632  df-pr 4634  df-tp 4636  df-op 4638  df-br 5149  df-opab 5211  df-id 5583  df-xp 5695  df-rel 5696  df-cnv 5697  df-co 5698  df-dm 5699  df-fun 6565  df-fn 6566
This theorem is referenced by: (None)
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