Theorem negsproplem1 27991

Description: Lemma for surreal negation. We prove a pair of properties of surreal negation simultaneously. First, we instantiate some quantifiers. (Contributed by Scott Fenton, 2-Feb-2025.)

Hypotheses

Ref	Expression
negsproplem.1	⊢ (𝜑 → ∀𝑥 ∈ No ∀𝑦 ∈ No ((( bday ‘𝑥) ∪ ( bday ‘𝑦)) ∈ (( bday ‘𝐴) ∪ ( bday ‘𝐵)) → (( -us ‘𝑥) ∈ No ∧ (𝑥 <s 𝑦 → ( -us ‘𝑦) <s ( -us ‘𝑥)))))
negsproplem1.1	⊢ (𝜑 → 𝑋 ∈ No )
negsproplem1.2	⊢ (𝜑 → 𝑌 ∈ No )
negsproplem1.3	⊢ (𝜑 → (( bday ‘𝑋) ∪ ( bday ‘𝑌)) ∈ (( bday ‘𝐴) ∪ ( bday ‘𝐵)))

Assertion

Ref	Expression
negsproplem1	⊢ (𝜑 → (( -us ‘𝑋) ∈ No ∧ (𝑋 <s 𝑌 → ( -us ‘𝑌) <s ( -us ‘𝑋))))

Distinct variable groups:   𝑥,𝐴,𝑦   𝑥,𝐵,𝑦   𝑥,𝑋,𝑦   𝑦,𝑌

Allowed substitution hints:   𝜑(𝑥,𝑦)   𝑌(𝑥)

Proof of Theorem negsproplem1

Step	Hyp	Ref	Expression
1		negsproplem1.1	. . 3 ⊢ (𝜑 → 𝑋 ∈ No )
2		negsproplem1.2	. . 3 ⊢ (𝜑 → 𝑌 ∈ No )
3	1, 2	jca 511	. 2 ⊢ (𝜑 → (𝑋 ∈ No ∧ 𝑌 ∈ No ))
4		negsproplem.1	. 2 ⊢ (𝜑 → ∀𝑥 ∈ No ∀𝑦 ∈ No ((( bday ‘𝑥) ∪ ( bday ‘𝑦)) ∈ (( bday ‘𝐴) ∪ ( bday ‘𝐵)) → (( -us ‘𝑥) ∈ No ∧ (𝑥 <s 𝑦 → ( -us ‘𝑦) <s ( -us ‘𝑥)))))
5		negsproplem1.3	. 2 ⊢ (𝜑 → (( bday ‘𝑋) ∪ ( bday ‘𝑌)) ∈ (( bday ‘𝐴) ∪ ( bday ‘𝐵)))
6		fveq2 6881	. . . . . 6 ⊢ (𝑥 = 𝑋 → ( bday ‘𝑥) = ( bday ‘𝑋))
7	6	uneq1d 4147	. . . . 5 ⊢ (𝑥 = 𝑋 → (( bday ‘𝑥) ∪ ( bday ‘𝑦)) = (( bday ‘𝑋) ∪ ( bday ‘𝑦)))
8	7	eleq1d 2820	. . . 4 ⊢ (𝑥 = 𝑋 → ((( bday ‘𝑥) ∪ ( bday ‘𝑦)) ∈ (( bday ‘𝐴) ∪ ( bday ‘𝐵)) ↔ (( bday ‘𝑋) ∪ ( bday ‘𝑦)) ∈ (( bday ‘𝐴) ∪ ( bday ‘𝐵))))
9		fveq2 6881	. . . . . 6 ⊢ (𝑥 = 𝑋 → ( -us ‘𝑥) = ( -us ‘𝑋))
10	9	eleq1d 2820	. . . . 5 ⊢ (𝑥 = 𝑋 → (( -us ‘𝑥) ∈ No ↔ ( -us ‘𝑋) ∈ No ))
11		breq1 5127	. . . . . 6 ⊢ (𝑥 = 𝑋 → (𝑥 <s 𝑦 ↔ 𝑋 <s 𝑦))
12	9	breq2d 5136	. . . . . 6 ⊢ (𝑥 = 𝑋 → (( -us ‘𝑦) <s ( -us ‘𝑥) ↔ ( -us ‘𝑦) <s ( -us ‘𝑋)))
13	11, 12	imbi12d 344	. . . . 5 ⊢ (𝑥 = 𝑋 → ((𝑥 <s 𝑦 → ( -us ‘𝑦) <s ( -us ‘𝑥)) ↔ (𝑋 <s 𝑦 → ( -us ‘𝑦) <s ( -us ‘𝑋))))
14	10, 13	anbi12d 632	. . . 4 ⊢ (𝑥 = 𝑋 → ((( -us ‘𝑥) ∈ No ∧ (𝑥 <s 𝑦 → ( -us ‘𝑦) <s ( -us ‘𝑥))) ↔ (( -us ‘𝑋) ∈ No ∧ (𝑋 <s 𝑦 → ( -us ‘𝑦) <s ( -us ‘𝑋)))))
15	8, 14	imbi12d 344	. . 3 ⊢ (𝑥 = 𝑋 → (((( bday ‘𝑥) ∪ ( bday ‘𝑦)) ∈ (( bday ‘𝐴) ∪ ( bday ‘𝐵)) → (( -us ‘𝑥) ∈ No ∧ (𝑥 <s 𝑦 → ( -us ‘𝑦) <s ( -us ‘𝑥)))) ↔ ((( bday ‘𝑋) ∪ ( bday ‘𝑦)) ∈ (( bday ‘𝐴) ∪ ( bday ‘𝐵)) → (( -us ‘𝑋) ∈ No ∧ (𝑋 <s 𝑦 → ( -us ‘𝑦) <s ( -us ‘𝑋))))))
16		fveq2 6881	. . . . . 6 ⊢ (𝑦 = 𝑌 → ( bday ‘𝑦) = ( bday ‘𝑌))
17	16	uneq2d 4148	. . . . 5 ⊢ (𝑦 = 𝑌 → (( bday ‘𝑋) ∪ ( bday ‘𝑦)) = (( bday ‘𝑋) ∪ ( bday ‘𝑌)))
18	17	eleq1d 2820	. . . 4 ⊢ (𝑦 = 𝑌 → ((( bday ‘𝑋) ∪ ( bday ‘𝑦)) ∈ (( bday ‘𝐴) ∪ ( bday ‘𝐵)) ↔ (( bday ‘𝑋) ∪ ( bday ‘𝑌)) ∈ (( bday ‘𝐴) ∪ ( bday ‘𝐵))))
19		breq2 5128	. . . . . 6 ⊢ (𝑦 = 𝑌 → (𝑋 <s 𝑦 ↔ 𝑋 <s 𝑌))
20		fveq2 6881	. . . . . . 7 ⊢ (𝑦 = 𝑌 → ( -us ‘𝑦) = ( -us ‘𝑌))
21	20	breq1d 5134	. . . . . 6 ⊢ (𝑦 = 𝑌 → (( -us ‘𝑦) <s ( -us ‘𝑋) ↔ ( -us ‘𝑌) <s ( -us ‘𝑋)))
22	19, 21	imbi12d 344	. . . . 5 ⊢ (𝑦 = 𝑌 → ((𝑋 <s 𝑦 → ( -us ‘𝑦) <s ( -us ‘𝑋)) ↔ (𝑋 <s 𝑌 → ( -us ‘𝑌) <s ( -us ‘𝑋))))
23	22	anbi2d 630	. . . 4 ⊢ (𝑦 = 𝑌 → ((( -us ‘𝑋) ∈ No ∧ (𝑋 <s 𝑦 → ( -us ‘𝑦) <s ( -us ‘𝑋))) ↔ (( -us ‘𝑋) ∈ No ∧ (𝑋 <s 𝑌 → ( -us ‘𝑌) <s ( -us ‘𝑋)))))
24	18, 23	imbi12d 344	. . 3 ⊢ (𝑦 = 𝑌 → (((( bday ‘𝑋) ∪ ( bday ‘𝑦)) ∈ (( bday ‘𝐴) ∪ ( bday ‘𝐵)) → (( -us ‘𝑋) ∈ No ∧ (𝑋 <s 𝑦 → ( -us ‘𝑦) <s ( -us ‘𝑋)))) ↔ ((( bday ‘𝑋) ∪ ( bday ‘𝑌)) ∈ (( bday ‘𝐴) ∪ ( bday ‘𝐵)) → (( -us ‘𝑋) ∈ No ∧ (𝑋 <s 𝑌 → ( -us ‘𝑌) <s ( -us ‘𝑋))))))
25	15, 24	rspc2v 3617	. 2 ⊢ ((𝑋 ∈ No ∧ 𝑌 ∈ No ) → (∀𝑥 ∈ No ∀𝑦 ∈ No ((( bday ‘𝑥) ∪ ( bday ‘𝑦)) ∈ (( bday ‘𝐴) ∪ ( bday ‘𝐵)) → (( -us ‘𝑥) ∈ No ∧ (𝑥 <s 𝑦 → ( -us ‘𝑦) <s ( -us ‘𝑥)))) → ((( bday ‘𝑋) ∪ ( bday ‘𝑌)) ∈ (( bday ‘𝐴) ∪ ( bday ‘𝐵)) → (( -us ‘𝑋) ∈ No ∧ (𝑋 <s 𝑌 → ( -us ‘𝑌) <s ( -us ‘𝑋))))))
26	3, 4, 5, 25	syl3c 66	1 ⊢ (𝜑 → (( -us ‘𝑋) ∈ No ∧ (𝑋 <s 𝑌 → ( -us ‘𝑌) <s ( -us ‘𝑋))))

Syntax hints:   → wi 4   ∧ wa 395   = wceq 1540   ∈ wcel 2109  ∀wral 3052   ∪ cun 3929   class class class wbr 5124  ‘cfv 6536   No csur 27608   <s cslt 27609   bday cbday 27610   -u_s cnegs 27982

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-ext 2708

This theorem depends on definitions:  df-bi 207  df-an 396  df-or 848  df-3an 1088  df-tru 1543  df-fal 1553  df-ex 1780  df-sb 2066  df-clab 2715  df-cleq 2728  df-clel 2810  df-ral 3053  df-rab 3421  df-v 3466  df-dif 3934  df-un 3936  df-ss 3948  df-nul 4314  df-if 4506  df-sn 4607  df-pr 4609  df-op 4613  df-uni 4889  df-br 5125  df-iota 6489  df-fv 6544

This theorem is referenced by:  negsproplem2  27992  negsproplem6  27996