Theorem nodenselem5 28027

Description: Lemma for nodense 28031. If the birthdays of two distinct surreals are equal, then the ordinal from nodenselem4 28026 is an element of that birthday. (Contributed by Scott Fenton, 16-Jun-2011.)

Assertion

Ref	Expression
nodenselem5	⊢ (((𝐴 ∈ No ∧ 𝐵 ∈ No ) ∧ (( bday ‘𝐴) = ( bday ‘𝐵) ∧ 𝐴 <s 𝐵)) → ∩ {𝑎 ∈ On ∣ (𝐴‘𝑎) ≠ (𝐵‘𝑎)} ∈ ( bday ‘𝐴))

Distinct variable groups:   𝐴,𝑎   𝐵,𝑎

Proof of Theorem nodenselem5

Step	Hyp	Ref	Expression
1		simpll 779	. . . 4 ⊢ (((𝐴 ∈ No ∧ 𝐵 ∈ No ) ∧ (( bday ‘𝐴) = ( bday ‘𝐵) ∧ 𝐴 <s 𝐵)) → 𝐴 ∈ No )
2		simplr 781	. . . 4 ⊢ (((𝐴 ∈ No ∧ 𝐵 ∈ No ) ∧ (( bday ‘𝐴) = ( bday ‘𝐵) ∧ 𝐴 <s 𝐵)) → 𝐵 ∈ No )
3		ltsso 28015	. . . . . . . . . 10 ⊢ <s Or No
4		sonr 5583	. . . . . . . . . 10 ⊢ (( <s Or No ∧ 𝐴 ∈ No ) → ¬ 𝐴 <s 𝐴)
5	3, 4	mpan 703	. . . . . . . . 9 ⊢ (𝐴 ∈ No → ¬ 𝐴 <s 𝐴)
6		breq2 5107	. . . . . . . . . 10 ⊢ (𝐴 = 𝐵 → (𝐴 <s 𝐴 ↔ 𝐴 <s 𝐵))
7	6	notbid 321	. . . . . . . . 9 ⊢ (𝐴 = 𝐵 → (¬ 𝐴 <s 𝐴 ↔ ¬ 𝐴 <s 𝐵))
8	5, 7	syl5ibcom 248	. . . . . . . 8 ⊢ (𝐴 ∈ No → (𝐴 = 𝐵 → ¬ 𝐴 <s 𝐵))
9	8	necon2ad 2971	. . . . . . 7 ⊢ (𝐴 ∈ No → (𝐴 <s 𝐵 → 𝐴 ≠ 𝐵))
10	9	adantr 486	. . . . . 6 ⊢ ((𝐴 ∈ No ∧ 𝐵 ∈ No ) → (𝐴 <s 𝐵 → 𝐴 ≠ 𝐵))
11	10	imp 412	. . . . 5 ⊢ (((𝐴 ∈ No ∧ 𝐵 ∈ No ) ∧ 𝐴 <s 𝐵) → 𝐴 ≠ 𝐵)
12	11	adantrl 729	. . . 4 ⊢ (((𝐴 ∈ No ∧ 𝐵 ∈ No ) ∧ (( bday ‘𝐴) = ( bday ‘𝐵) ∧ 𝐴 <s 𝐵)) → 𝐴 ≠ 𝐵)
13		nosepdm 28023	. . . 4 ⊢ ((𝐴 ∈ No ∧ 𝐵 ∈ No ∧ 𝐴 ≠ 𝐵) → ∩ {𝑎 ∈ On ∣ (𝐴‘𝑎) ≠ (𝐵‘𝑎)} ∈ (dom 𝐴 ∪ dom 𝐵))
14	1, 2, 12, 13	syl3anc 1398	. . 3 ⊢ (((𝐴 ∈ No ∧ 𝐵 ∈ No ) ∧ (( bday ‘𝐴) = ( bday ‘𝐵) ∧ 𝐴 <s 𝐵)) → ∩ {𝑎 ∈ On ∣ (𝐴‘𝑎) ≠ (𝐵‘𝑎)} ∈ (dom 𝐴 ∪ dom 𝐵))
15		simprl 783	. . . . . 6 ⊢ (((𝐴 ∈ No ∧ 𝐵 ∈ No ) ∧ (( bday ‘𝐴) = ( bday ‘𝐵) ∧ 𝐴 <s 𝐵)) → ( bday ‘𝐴) = ( bday ‘𝐵))
16	15	uneq2d 4115	. . . . 5 ⊢ (((𝐴 ∈ No ∧ 𝐵 ∈ No ) ∧ (( bday ‘𝐴) = ( bday ‘𝐵) ∧ 𝐴 <s 𝐵)) → (( bday ‘𝐴) ∪ ( bday ‘𝐴)) = (( bday ‘𝐴) ∪ ( bday ‘𝐵)))
17		unidm 4104	. . . . 5 ⊢ (( bday ‘𝐴) ∪ ( bday ‘𝐴)) = ( bday ‘𝐴)
18	16, 17	eqtr3di 2811	. . . 4 ⊢ (((𝐴 ∈ No ∧ 𝐵 ∈ No ) ∧ (( bday ‘𝐴) = ( bday ‘𝐵) ∧ 𝐴 <s 𝐵)) → (( bday ‘𝐴) ∪ ( bday ‘𝐵)) = ( bday ‘𝐴))
19		bdayval 27987	. . . . . 6 ⊢ (𝐴 ∈ No → ( bday ‘𝐴) = dom 𝐴)
20	1, 19	syl 18	. . . . 5 ⊢ (((𝐴 ∈ No ∧ 𝐵 ∈ No ) ∧ (( bday ‘𝐴) = ( bday ‘𝐵) ∧ 𝐴 <s 𝐵)) → ( bday ‘𝐴) = dom 𝐴)
21		bdayval 27987	. . . . . 6 ⊢ (𝐵 ∈ No → ( bday ‘𝐵) = dom 𝐵)
22	2, 21	syl 18	. . . . 5 ⊢ (((𝐴 ∈ No ∧ 𝐵 ∈ No ) ∧ (( bday ‘𝐴) = ( bday ‘𝐵) ∧ 𝐴 <s 𝐵)) → ( bday ‘𝐵) = dom 𝐵)
23	20, 22	uneq12d 4116	. . . 4 ⊢ (((𝐴 ∈ No ∧ 𝐵 ∈ No ) ∧ (( bday ‘𝐴) = ( bday ‘𝐵) ∧ 𝐴 <s 𝐵)) → (( bday ‘𝐴) ∪ ( bday ‘𝐵)) = (dom 𝐴 ∪ dom 𝐵))
24	18, 23, 20	3eqtr3d 2804	. . 3 ⊢ (((𝐴 ∈ No ∧ 𝐵 ∈ No ) ∧ (( bday ‘𝐴) = ( bday ‘𝐵) ∧ 𝐴 <s 𝐵)) → (dom 𝐴 ∪ dom 𝐵) = dom 𝐴)
25	14, 24	eleqtrd 2863	. 2 ⊢ (((𝐴 ∈ No ∧ 𝐵 ∈ No ) ∧ (( bday ‘𝐴) = ( bday ‘𝐵) ∧ 𝐴 <s 𝐵)) → ∩ {𝑎 ∈ On ∣ (𝐴‘𝑎) ≠ (𝐵‘𝑎)} ∈ dom 𝐴)
26	25, 20	eleqtrrd 2864	1 ⊢ (((𝐴 ∈ No ∧ 𝐵 ∈ No ) ∧ (( bday ‘𝐴) = ( bday ‘𝐵) ∧ 𝐴 <s 𝐵)) → ∩ {𝑎 ∈ On ∣ (𝐴‘𝑎) ≠ (𝐵‘𝑎)} ∈ ( bday ‘𝐴))

This proof depends on syntax axioms:  ¬ wn 3   → wi 4   ∧ wa 401   = wceq 1570   ∈ wcel 2145   ≠ wne 2956  {crab 3413   ∪ cun 3897  ∩ cint 4907   class class class wbr 5103   Or wor 5558  dom cdm 5651  Oncon0 6355  ‘cfv 6531   No csur 27979   <s clts 27980   bday cbday 27981

This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1828  ax-4 1842  ax-5 1943  ax-6 2000  ax-7 2041  ax-8 2147  ax-9 2155  ax-10 2178  ax-11 2194  ax-12 2213  ax-ext 2733  ax-sep 5249  ax-nul 5260  ax-pr 5391  ax-un 7740

This proof depends on definitions:  df-bi 210  df-an 402  df-or 862  df-3or 1104  df-3an 1105  df-tru 1573  df-fal 1583  df-ex 1813  df-nf 1817  df-sb 2100  df-mo 2565  df-eu 2595  df-clab 2740  df-cleq 2753  df-clel 2836  df-nfc 2910  df-ne 2957  df-ral 3078  df-rex 3088  df-rab 3414  df-v 3453  df-sbc 3740  df-csb 3848  df-dif 3902  df-un 3904  df-in 3906  df-ss 3916  df-pss 3919  df-nul 4280  df-if 4483  df-pw 4559  df-sn 4585  df-pr 4587  df-tp 4589  df-op 4591  df-uni 4868  df-int 4908  df-br 5104  df-opab 5168  df-mpt 5187  df-tr 5213  df-id 5546  df-eprel 5551  df-po 5559  df-so 5560  df-fr 5604  df-we 5606  df-xp 5657  df-rel 5658  df-cnv 5659  df-co 5660  df-dm 5661  df-rn 5662  df-res 5663  df-ima 5664  df-ord 6358  df-on 6359  df-suc 6361  df-iota 6487  df-fun 6533  df-fn 6534  df-f 6535  df-fv 6539  df-1o 8460  df-2o 8461  df-no 27982  df-lts 27983  df-bday 27984

This theorem is used by:  nodenselem8  28030  nodense  28031