Theorem nolt02olem 27754

Description: Lemma for nolt02o 27755. If 𝐴(𝑋) is undefined with 𝐴 surreal and 𝑋 ordinal, then dom 𝐴 ⊆ 𝑋. (Contributed by Scott Fenton, 6-Dec-2021.)

Assertion

Ref	Expression
nolt02olem	⊢ ((𝐴 ∈ No ∧ 𝑋 ∈ On ∧ (𝐴‘𝑋) = ∅) → dom 𝐴 ⊆ 𝑋)

Proof of Theorem nolt02olem

Step	Hyp	Ref	Expression
1		nosgnn0 27718	. . . 4 ⊢ ¬ ∅ ∈ {1o, 2o}
2	1	a1i 11	. . 3 ⊢ ((𝐴 ∈ No ∧ 𝑋 ∈ On ∧ (𝐴‘𝑋) = ∅) → ¬ ∅ ∈ {1o, 2o})
3		simpl3 1192	. . . 4 ⊢ (((𝐴 ∈ No ∧ 𝑋 ∈ On ∧ (𝐴‘𝑋) = ∅) ∧ 𝑋 ∈ dom 𝐴) → (𝐴‘𝑋) = ∅)
4		simpl1 1190	. . . . . 6 ⊢ (((𝐴 ∈ No ∧ 𝑋 ∈ On ∧ (𝐴‘𝑋) = ∅) ∧ 𝑋 ∈ dom 𝐴) → 𝐴 ∈ No )
5		norn 27711	. . . . . 6 ⊢ (𝐴 ∈ No → ran 𝐴 ⊆ {1o, 2o})
6	4, 5	syl 17	. . . . 5 ⊢ (((𝐴 ∈ No ∧ 𝑋 ∈ On ∧ (𝐴‘𝑋) = ∅) ∧ 𝑋 ∈ dom 𝐴) → ran 𝐴 ⊆ {1o, 2o})
7		nofun 27709	. . . . . . 7 ⊢ (𝐴 ∈ No → Fun 𝐴)
8	7	3ad2ant1 1132	. . . . . 6 ⊢ ((𝐴 ∈ No ∧ 𝑋 ∈ On ∧ (𝐴‘𝑋) = ∅) → Fun 𝐴)
9		fvelrn 7096	. . . . . 6 ⊢ ((Fun 𝐴 ∧ 𝑋 ∈ dom 𝐴) → (𝐴‘𝑋) ∈ ran 𝐴)
10	8, 9	sylan 580	. . . . 5 ⊢ (((𝐴 ∈ No ∧ 𝑋 ∈ On ∧ (𝐴‘𝑋) = ∅) ∧ 𝑋 ∈ dom 𝐴) → (𝐴‘𝑋) ∈ ran 𝐴)
11	6, 10	sseldd 3996	. . . 4 ⊢ (((𝐴 ∈ No ∧ 𝑋 ∈ On ∧ (𝐴‘𝑋) = ∅) ∧ 𝑋 ∈ dom 𝐴) → (𝐴‘𝑋) ∈ {1o, 2o})
12	3, 11	eqeltrrd 2840	. . 3 ⊢ (((𝐴 ∈ No ∧ 𝑋 ∈ On ∧ (𝐴‘𝑋) = ∅) ∧ 𝑋 ∈ dom 𝐴) → ∅ ∈ {1o, 2o})
13	2, 12	mtand 816	. 2 ⊢ ((𝐴 ∈ No ∧ 𝑋 ∈ On ∧ (𝐴‘𝑋) = ∅) → ¬ 𝑋 ∈ dom 𝐴)
14		nodmon 27710	. . . 4 ⊢ (𝐴 ∈ No → dom 𝐴 ∈ On)
15	14	3ad2ant1 1132	. . 3 ⊢ ((𝐴 ∈ No ∧ 𝑋 ∈ On ∧ (𝐴‘𝑋) = ∅) → dom 𝐴 ∈ On)
16		simp2 1136	. . 3 ⊢ ((𝐴 ∈ No ∧ 𝑋 ∈ On ∧ (𝐴‘𝑋) = ∅) → 𝑋 ∈ On)
17		ontri1 6420	. . 3 ⊢ ((dom 𝐴 ∈ On ∧ 𝑋 ∈ On) → (dom 𝐴 ⊆ 𝑋 ↔ ¬ 𝑋 ∈ dom 𝐴))
18	15, 16, 17	syl2anc 584	. 2 ⊢ ((𝐴 ∈ No ∧ 𝑋 ∈ On ∧ (𝐴‘𝑋) = ∅) → (dom 𝐴 ⊆ 𝑋 ↔ ¬ 𝑋 ∈ dom 𝐴))
19	13, 18	mpbird 257	1 ⊢ ((𝐴 ∈ No ∧ 𝑋 ∈ On ∧ (𝐴‘𝑋) = ∅) → dom 𝐴 ⊆ 𝑋)

Syntax hints:  ¬ wn 3   → wi 4   ↔ wb 206   ∧ wa 395   ∧ w3a 1086   = wceq 1537   ∈ wcel 2106   ⊆ wss 3963  ∅c0 4339  {cpr 4633  dom cdm 5689  ran crn 5690  Oncon0 6386  Fun wfun 6557  ‘cfv 6563  1_oc1o 8498  2_oc2o 8499   No csur 27699

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-pow 5371  ax-pr 5438  ax-un 7754

This theorem depends on definitions:  df-bi 207  df-an 396  df-or 848  df-3or 1087  df-3an 1088  df-tru 1540  df-fal 1550  df-ex 1777  df-nf 1781  df-sb 2063  df-mo 2538  df-eu 2567  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-pss 3983  df-nul 4340  df-if 4532  df-pw 4607  df-sn 4632  df-pr 4634  df-op 4638  df-uni 4913  df-br 5149  df-opab 5211  df-tr 5266  df-id 5583  df-eprel 5589  df-po 5597  df-so 5598  df-fr 5641  df-we 5643  df-xp 5695  df-rel 5696  df-cnv 5697  df-co 5698  df-dm 5699  df-rn 5700  df-ord 6389  df-on 6390  df-suc 6392  df-iota 6516  df-fun 6565  df-fn 6566  df-f 6567  df-fv 6571  df-1o 8505  df-2o 8506  df-no 27702

This theorem is referenced by:  nolt02o  27755  nogt01o  27756