Theorem negbdaylem 28062

Description: Lemma for negbday 28063. Bound the birthday of the negative of a surreal number above. (Contributed by Scott Fenton, 8-Mar-2025.)

Assertion

Ref	Expression
negbdaylem	⊢ (𝐴 ∈ No → ( bday ‘( -us ‘𝐴)) ⊆ ( bday ‘𝐴))

Proof of Theorem negbdaylem

Dummy variables 𝑥 𝑥_𝑂 𝑦 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		2fveq3 6839	. . 3 ⊢ (𝑥 = 𝑥𝑂 → ( bday ‘( -us ‘𝑥)) = ( bday ‘( -us ‘𝑥𝑂)))
2		fveq2 6834	. . 3 ⊢ (𝑥 = 𝑥𝑂 → ( bday ‘𝑥) = ( bday ‘𝑥𝑂))
3	1, 2	sseq12d 3956	. 2 ⊢ (𝑥 = 𝑥𝑂 → (( bday ‘( -us ‘𝑥)) ⊆ ( bday ‘𝑥) ↔ ( bday ‘( -us ‘𝑥𝑂)) ⊆ ( bday ‘𝑥𝑂)))
4		2fveq3 6839	. . 3 ⊢ (𝑥 = 𝐴 → ( bday ‘( -us ‘𝑥)) = ( bday ‘( -us ‘𝐴)))
5		fveq2 6834	. . 3 ⊢ (𝑥 = 𝐴 → ( bday ‘𝑥) = ( bday ‘𝐴))
6	4, 5	sseq12d 3956	. 2 ⊢ (𝑥 = 𝐴 → (( bday ‘( -us ‘𝑥)) ⊆ ( bday ‘𝑥) ↔ ( bday ‘( -us ‘𝐴)) ⊆ ( bday ‘𝐴)))
7		negsval 28031	. . . . . 6 ⊢ (𝑥 ∈ No → ( -us ‘𝑥) = (( -us “ ( R ‘𝑥)) |s ( -us “ ( L ‘𝑥))))
8	7	fveq2d 6838	. . . . 5 ⊢ (𝑥 ∈ No → ( bday ‘( -us ‘𝑥)) = ( bday ‘(( -us “ ( R ‘𝑥)) |s ( -us “ ( L ‘𝑥)))))
9	8	adantr 480	. . . 4 ⊢ ((𝑥 ∈ No ∧ ∀𝑥𝑂 ∈ (( L ‘𝑥) ∪ ( R ‘𝑥))( bday ‘( -us ‘𝑥𝑂)) ⊆ ( bday ‘𝑥𝑂)) → ( bday ‘( -us ‘𝑥)) = ( bday ‘(( -us “ ( R ‘𝑥)) |s ( -us “ ( L ‘𝑥)))))
10		negcut2 28046	. . . . 5 ⊢ (𝑥 ∈ No → ( -us “ ( R ‘𝑥)) <<s ( -us “ ( L ‘𝑥)))
11		lrold 27903	. . . . . . . . . 10 ⊢ (( L ‘𝑥) ∪ ( R ‘𝑥)) = ( O ‘( bday ‘𝑥))
12		uncom 4099	. . . . . . . . . 10 ⊢ (( L ‘𝑥) ∪ ( R ‘𝑥)) = (( R ‘𝑥) ∪ ( L ‘𝑥))
13	11, 12	eqtr3i 2762	. . . . . . . . 9 ⊢ ( O ‘( bday ‘𝑥)) = (( R ‘𝑥) ∪ ( L ‘𝑥))
14	13	imaeq2i 6017	. . . . . . . 8 ⊢ ( -us “ ( O ‘( bday ‘𝑥))) = ( -us “ (( R ‘𝑥) ∪ ( L ‘𝑥)))
15		imaundi 6107	. . . . . . . 8 ⊢ ( -us “ (( R ‘𝑥) ∪ ( L ‘𝑥))) = (( -us “ ( R ‘𝑥)) ∪ ( -us “ ( L ‘𝑥)))
16	14, 15	eqtri 2760	. . . . . . 7 ⊢ ( -us “ ( O ‘( bday ‘𝑥))) = (( -us “ ( R ‘𝑥)) ∪ ( -us “ ( L ‘𝑥)))
17	16	imaeq2i 6017	. . . . . 6 ⊢ ( bday “ ( -us “ ( O ‘( bday ‘𝑥)))) = ( bday “ (( -us “ ( R ‘𝑥)) ∪ ( -us “ ( L ‘𝑥))))
18	11	raleqi 3294	. . . . . . 7 ⊢ (∀𝑥𝑂 ∈ (( L ‘𝑥) ∪ ( R ‘𝑥))( bday ‘( -us ‘𝑥𝑂)) ⊆ ( bday ‘𝑥𝑂) ↔ ∀𝑥𝑂 ∈ ( O ‘( bday ‘𝑥))( bday ‘( -us ‘𝑥𝑂)) ⊆ ( bday ‘𝑥𝑂))
19		oldbdayim 27895	. . . . . . . . . . . 12 ⊢ (𝑥𝑂 ∈ ( O ‘( bday ‘𝑥)) → ( bday ‘𝑥𝑂) ∈ ( bday ‘𝑥))
20	19	adantl 481	. . . . . . . . . . 11 ⊢ ((𝑥 ∈ No ∧ 𝑥𝑂 ∈ ( O ‘( bday ‘𝑥))) → ( bday ‘𝑥𝑂) ∈ ( bday ‘𝑥))
21		bdayon 27758	. . . . . . . . . . . . 13 ⊢ ( bday ‘( -us ‘𝑥𝑂)) ∈ On
22		bdayon 27758	. . . . . . . . . . . . 13 ⊢ ( bday ‘𝑥) ∈ On
23		ontr2 6365	. . . . . . . . . . . . 13 ⊢ ((( bday ‘( -us ‘𝑥𝑂)) ∈ On ∧ ( bday ‘𝑥) ∈ On) → ((( bday ‘( -us ‘𝑥𝑂)) ⊆ ( bday ‘𝑥𝑂) ∧ ( bday ‘𝑥𝑂) ∈ ( bday ‘𝑥)) → ( bday ‘( -us ‘𝑥𝑂)) ∈ ( bday ‘𝑥)))
24	21, 22, 23	mp2an 693	. . . . . . . . . . . 12 ⊢ ((( bday ‘( -us ‘𝑥𝑂)) ⊆ ( bday ‘𝑥𝑂) ∧ ( bday ‘𝑥𝑂) ∈ ( bday ‘𝑥)) → ( bday ‘( -us ‘𝑥𝑂)) ∈ ( bday ‘𝑥))
25	24	a1i 11	. . . . . . . . . . 11 ⊢ ((𝑥 ∈ No ∧ 𝑥𝑂 ∈ ( O ‘( bday ‘𝑥))) → ((( bday ‘( -us ‘𝑥𝑂)) ⊆ ( bday ‘𝑥𝑂) ∧ ( bday ‘𝑥𝑂) ∈ ( bday ‘𝑥)) → ( bday ‘( -us ‘𝑥𝑂)) ∈ ( bday ‘𝑥)))
26	20, 25	mpan2d 695	. . . . . . . . . 10 ⊢ ((𝑥 ∈ No ∧ 𝑥𝑂 ∈ ( O ‘( bday ‘𝑥))) → (( bday ‘( -us ‘𝑥𝑂)) ⊆ ( bday ‘𝑥𝑂) → ( bday ‘( -us ‘𝑥𝑂)) ∈ ( bday ‘𝑥)))
27	26	ralimdva 3150	. . . . . . . . 9 ⊢ (𝑥 ∈ No → (∀𝑥𝑂 ∈ ( O ‘( bday ‘𝑥))( bday ‘( -us ‘𝑥𝑂)) ⊆ ( bday ‘𝑥𝑂) → ∀𝑥𝑂 ∈ ( O ‘( bday ‘𝑥))( bday ‘( -us ‘𝑥𝑂)) ∈ ( bday ‘𝑥)))
28	27	imp 406	. . . . . . . 8 ⊢ ((𝑥 ∈ No ∧ ∀𝑥𝑂 ∈ ( O ‘( bday ‘𝑥))( bday ‘( -us ‘𝑥𝑂)) ⊆ ( bday ‘𝑥𝑂)) → ∀𝑥𝑂 ∈ ( O ‘( bday ‘𝑥))( bday ‘( -us ‘𝑥𝑂)) ∈ ( bday ‘𝑥))
29		bdayfun 27754	. . . . . . . . . 10 ⊢ Fun bday
30		imassrn 6030	. . . . . . . . . . 11 ⊢ ( -us “ ( O ‘( bday ‘𝑥))) ⊆ ran -us
31		bdaydm 27756	. . . . . . . . . . . 12 ⊢ dom bday = No
32		negsfo 28059	. . . . . . . . . . . . 13 ⊢ -us : No –onto→ No
33		forn 6749	. . . . . . . . . . . . 13 ⊢ ( -us : No –onto→ No → ran -us = No )
34	32, 33	ax-mp 5	. . . . . . . . . . . 12 ⊢ ran -us = No
35	31, 34	eqtr4i 2763	. . . . . . . . . . 11 ⊢ dom bday = ran -us
36	30, 35	sseqtrri 3972	. . . . . . . . . 10 ⊢ ( -us “ ( O ‘( bday ‘𝑥))) ⊆ dom bday
37		funimass4 6898	. . . . . . . . . 10 ⊢ ((Fun bday ∧ ( -us “ ( O ‘( bday ‘𝑥))) ⊆ dom bday ) → (( bday “ ( -us “ ( O ‘( bday ‘𝑥)))) ⊆ ( bday ‘𝑥) ↔ ∀𝑦 ∈ ( -us “ ( O ‘( bday ‘𝑥)))( bday ‘𝑦) ∈ ( bday ‘𝑥)))
38	29, 36, 37	mp2an 693	. . . . . . . . 9 ⊢ (( bday “ ( -us “ ( O ‘( bday ‘𝑥)))) ⊆ ( bday ‘𝑥) ↔ ∀𝑦 ∈ ( -us “ ( O ‘( bday ‘𝑥)))( bday ‘𝑦) ∈ ( bday ‘𝑥))
39		negsfn 28029	. . . . . . . . . 10 ⊢ -us Fn No
40		oldssno 27847	. . . . . . . . . 10 ⊢ ( O ‘( bday ‘𝑥)) ⊆ No
41		fveq2 6834	. . . . . . . . . . . 12 ⊢ (𝑦 = ( -us ‘𝑥𝑂) → ( bday ‘𝑦) = ( bday ‘( -us ‘𝑥𝑂)))
42	41	eleq1d 2822	. . . . . . . . . . 11 ⊢ (𝑦 = ( -us ‘𝑥𝑂) → (( bday ‘𝑦) ∈ ( bday ‘𝑥) ↔ ( bday ‘( -us ‘𝑥𝑂)) ∈ ( bday ‘𝑥)))
43	42	ralima 7185	. . . . . . . . . 10 ⊢ (( -us Fn No ∧ ( O ‘( bday ‘𝑥)) ⊆ No ) → (∀𝑦 ∈ ( -us “ ( O ‘( bday ‘𝑥)))( bday ‘𝑦) ∈ ( bday ‘𝑥) ↔ ∀𝑥𝑂 ∈ ( O ‘( bday ‘𝑥))( bday ‘( -us ‘𝑥𝑂)) ∈ ( bday ‘𝑥)))
44	39, 40, 43	mp2an 693	. . . . . . . . 9 ⊢ (∀𝑦 ∈ ( -us “ ( O ‘( bday ‘𝑥)))( bday ‘𝑦) ∈ ( bday ‘𝑥) ↔ ∀𝑥𝑂 ∈ ( O ‘( bday ‘𝑥))( bday ‘( -us ‘𝑥𝑂)) ∈ ( bday ‘𝑥))
45	38, 44	bitri 275	. . . . . . . 8 ⊢ (( bday “ ( -us “ ( O ‘( bday ‘𝑥)))) ⊆ ( bday ‘𝑥) ↔ ∀𝑥𝑂 ∈ ( O ‘( bday ‘𝑥))( bday ‘( -us ‘𝑥𝑂)) ∈ ( bday ‘𝑥))
46	28, 45	sylibr 234	. . . . . . 7 ⊢ ((𝑥 ∈ No ∧ ∀𝑥𝑂 ∈ ( O ‘( bday ‘𝑥))( bday ‘( -us ‘𝑥𝑂)) ⊆ ( bday ‘𝑥𝑂)) → ( bday “ ( -us “ ( O ‘( bday ‘𝑥)))) ⊆ ( bday ‘𝑥))
47	18, 46	sylan2b 595	. . . . . 6 ⊢ ((𝑥 ∈ No ∧ ∀𝑥𝑂 ∈ (( L ‘𝑥) ∪ ( R ‘𝑥))( bday ‘( -us ‘𝑥𝑂)) ⊆ ( bday ‘𝑥𝑂)) → ( bday “ ( -us “ ( O ‘( bday ‘𝑥)))) ⊆ ( bday ‘𝑥))
48	17, 47	eqsstrrid 3962	. . . . 5 ⊢ ((𝑥 ∈ No ∧ ∀𝑥𝑂 ∈ (( L ‘𝑥) ∪ ( R ‘𝑥))( bday ‘( -us ‘𝑥𝑂)) ⊆ ( bday ‘𝑥𝑂)) → ( bday “ (( -us “ ( R ‘𝑥)) ∪ ( -us “ ( L ‘𝑥)))) ⊆ ( bday ‘𝑥))
49		cutbdaybnd 27801	. . . . . 6 ⊢ ((( -us “ ( R ‘𝑥)) <<s ( -us “ ( L ‘𝑥)) ∧ ( bday ‘𝑥) ∈ On ∧ ( bday “ (( -us “ ( R ‘𝑥)) ∪ ( -us “ ( L ‘𝑥)))) ⊆ ( bday ‘𝑥)) → ( bday ‘(( -us “ ( R ‘𝑥)) |s ( -us “ ( L ‘𝑥)))) ⊆ ( bday ‘𝑥))
50	22, 49	mp3an2 1452	. . . . 5 ⊢ ((( -us “ ( R ‘𝑥)) <<s ( -us “ ( L ‘𝑥)) ∧ ( bday “ (( -us “ ( R ‘𝑥)) ∪ ( -us “ ( L ‘𝑥)))) ⊆ ( bday ‘𝑥)) → ( bday ‘(( -us “ ( R ‘𝑥)) |s ( -us “ ( L ‘𝑥)))) ⊆ ( bday ‘𝑥))
51	10, 48, 50	syl2an2r 686	. . . 4 ⊢ ((𝑥 ∈ No ∧ ∀𝑥𝑂 ∈ (( L ‘𝑥) ∪ ( R ‘𝑥))( bday ‘( -us ‘𝑥𝑂)) ⊆ ( bday ‘𝑥𝑂)) → ( bday ‘(( -us “ ( R ‘𝑥)) |s ( -us “ ( L ‘𝑥)))) ⊆ ( bday ‘𝑥))
52	9, 51	eqsstrd 3957	. . 3 ⊢ ((𝑥 ∈ No ∧ ∀𝑥𝑂 ∈ (( L ‘𝑥) ∪ ( R ‘𝑥))( bday ‘( -us ‘𝑥𝑂)) ⊆ ( bday ‘𝑥𝑂)) → ( bday ‘( -us ‘𝑥)) ⊆ ( bday ‘𝑥))
53	52	ex 412	. 2 ⊢ (𝑥 ∈ No → (∀𝑥𝑂 ∈ (( L ‘𝑥) ∪ ( R ‘𝑥))( bday ‘( -us ‘𝑥𝑂)) ⊆ ( bday ‘𝑥𝑂) → ( bday ‘( -us ‘𝑥)) ⊆ ( bday ‘𝑥)))
54	3, 6, 53	noinds 27951	1 ⊢ (𝐴 ∈ No → ( bday ‘( -us ‘𝐴)) ⊆ ( bday ‘𝐴))

Syntax hints:   → wi 4   ↔ wb 206   ∧ wa 395   = wceq 1542   ∈ wcel 2114  ∀wral 3052   ∪ cun 3888   ⊆ wss 3890   class class class wbr 5086  dom cdm 5624  ran crn 5625   “ cima 5627  Oncon0 6317  Fun wfun 6486   Fn wfn 6487  –onto→wfo 6490  ‘cfv 6492  (class class class)co 7360   No csur 27617   bday cbday 27619   <<s cslts 27763   |s ccuts 27765   O cold 27829   L cleft 27831   R cright 27832   -u_s cnegs 28025

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1797  ax-4 1811  ax-5 1912  ax-6 1969  ax-7 2010  ax-8 2116  ax-9 2124  ax-10 2147  ax-11 2163  ax-12 2185  ax-ext 2709  ax-rep 5212  ax-sep 5231  ax-nul 5241  ax-pow 5302  ax-pr 5370  ax-un 7682

This theorem depends on definitions:  df-bi 207  df-an 396  df-or 849  df-3or 1088  df-3an 1089  df-tru 1545  df-fal 1555  df-ex 1782  df-nf 1786  df-sb 2069  df-mo 2540  df-eu 2570  df-clab 2716  df-cleq 2729  df-clel 2812  df-nfc 2886  df-ne 2934  df-ral 3053  df-rex 3063  df-rmo 3343  df-reu 3344  df-rab 3391  df-v 3432  df-sbc 3730  df-csb 3839  df-dif 3893  df-un 3895  df-in 3897  df-ss 3907  df-pss 3910  df-nul 4275  df-if 4468  df-pw 4544  df-sn 4569  df-pr 4571  df-tp 4573  df-op 4575  df-ot 4577  df-uni 4852  df-int 4891  df-iun 4936  df-br 5087  df-opab 5149  df-mpt 5168  df-tr 5194  df-id 5519  df-eprel 5524  df-po 5532  df-so 5533  df-fr 5577  df-se 5578  df-we 5579  df-xp 5630  df-rel 5631  df-cnv 5632  df-co 5633  df-dm 5634  df-rn 5635  df-res 5636  df-ima 5637  df-pred 6259  df-ord 6320  df-on 6321  df-suc 6323  df-iota 6448  df-fun 6494  df-fn 6495  df-f 6496  df-f1 6497  df-fo 6498  df-f1o 6499  df-fv 6500  df-riota 7317  df-ov 7363  df-oprab 7364  df-mpo 7365  df-1st 7935  df-2nd 7936  df-frecs 8224  df-wrecs 8255  df-recs 8304  df-1o 8398  df-2o 8399  df-nadd 8595  df-no 27620  df-lts 27621  df-bday 27622  df-les 27723  df-slts 27764  df-cuts 27766  df-0s 27813  df-made 27833  df-old 27834  df-left 27836  df-right 27837  df-norec 27944  df-norec2 27955  df-adds 27966  df-negs 28027

This theorem is referenced by:  negbday  28063