Theorem nolt02olem 27604

Description: Lemma for nolt02o 27605. 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 27568	. . . 4 ⊢ ¬ ∅ ∈ {1o, 2o}
2	1	a1i 11	. . 3 ⊢ ((𝐴 ∈ No ∧ 𝑋 ∈ On ∧ (𝐴‘𝑋) = ∅) → ¬ ∅ ∈ {1o, 2o})
3		simpl3 1194	. . . 4 ⊢ (((𝐴 ∈ No ∧ 𝑋 ∈ On ∧ (𝐴‘𝑋) = ∅) ∧ 𝑋 ∈ dom 𝐴) → (𝐴‘𝑋) = ∅)
4		simpl1 1192	. . . . . 6 ⊢ (((𝐴 ∈ No ∧ 𝑋 ∈ On ∧ (𝐴‘𝑋) = ∅) ∧ 𝑋 ∈ dom 𝐴) → 𝐴 ∈ No )
5		norn 27561	. . . . . 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 27559	. . . . . . 7 ⊢ (𝐴 ∈ No → Fun 𝐴)
8	7	3ad2ant1 1133	. . . . . 6 ⊢ ((𝐴 ∈ No ∧ 𝑋 ∈ On ∧ (𝐴‘𝑋) = ∅) → Fun 𝐴)
9		fvelrn 7010	. . . . . 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 3936	. . . 4 ⊢ (((𝐴 ∈ No ∧ 𝑋 ∈ On ∧ (𝐴‘𝑋) = ∅) ∧ 𝑋 ∈ dom 𝐴) → (𝐴‘𝑋) ∈ {1o, 2o})
12	3, 11	eqeltrrd 2829	. . 3 ⊢ (((𝐴 ∈ No ∧ 𝑋 ∈ On ∧ (𝐴‘𝑋) = ∅) ∧ 𝑋 ∈ dom 𝐴) → ∅ ∈ {1o, 2o})
13	2, 12	mtand 815	. 2 ⊢ ((𝐴 ∈ No ∧ 𝑋 ∈ On ∧ (𝐴‘𝑋) = ∅) → ¬ 𝑋 ∈ dom 𝐴)
14		nodmon 27560	. . . 4 ⊢ (𝐴 ∈ No → dom 𝐴 ∈ On)
15	14	3ad2ant1 1133	. . 3 ⊢ ((𝐴 ∈ No ∧ 𝑋 ∈ On ∧ (𝐴‘𝑋) = ∅) → dom 𝐴 ∈ On)
16		simp2 1137	. . 3 ⊢ ((𝐴 ∈ No ∧ 𝑋 ∈ On ∧ (𝐴‘𝑋) = ∅) → 𝑋 ∈ On)
17		ontri1 6341	. . 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 1540   ∈ wcel 2109   ⊆ wss 3903  ∅c0 4284  {cpr 4579  dom cdm 5619  ran crn 5620  Oncon0 6307  Fun wfun 6476  ‘cfv 6482  1_oc1o 8381  2_oc2o 8382   No csur 27549

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1795  ax-4 1809  ax-5 1910  ax-6 1967  ax-7 2008  ax-8 2111  ax-9 2119  ax-10 2142  ax-12 2178  ax-ext 2701  ax-sep 5235  ax-nul 5245  ax-pow 5304  ax-pr 5371  ax-un 7671

This theorem depends on definitions:  df-bi 207  df-an 396  df-or 848  df-3or 1087  df-3an 1088  df-tru 1543  df-fal 1553  df-ex 1780  df-nf 1784  df-sb 2066  df-mo 2533  df-eu 2562  df-clab 2708  df-cleq 2721  df-clel 2803  df-ne 2926  df-ral 3045  df-rex 3054  df-rab 3395  df-v 3438  df-dif 3906  df-un 3908  df-in 3910  df-ss 3920  df-pss 3923  df-nul 4285  df-if 4477  df-pw 4553  df-sn 4578  df-pr 4580  df-op 4584  df-uni 4859  df-br 5093  df-opab 5155  df-tr 5200  df-id 5514  df-eprel 5519  df-po 5527  df-so 5528  df-fr 5572  df-we 5574  df-xp 5625  df-rel 5626  df-cnv 5627  df-co 5628  df-dm 5629  df-rn 5630  df-ord 6310  df-on 6311  df-suc 6313  df-iota 6438  df-fun 6484  df-fn 6485  df-f 6486  df-fv 6490  df-1o 8388  df-2o 8389  df-no 27552

This theorem is referenced by:  nolt02o  27605  nogt01o  27606