Theorem peano5uzs 28408

Description: Peano's inductive postulate for upper surreal integers. (Contributed by Scott Fenton, 25-Jul-2025.)

Hypotheses

Ref	Expression
peano5uzs.1	⊢ (𝜑 → 𝑁 ∈ ℤs)
peano5uzs.2	⊢ (𝜑 → 𝑁 ∈ 𝐴)
peano5uzs.3	⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → (𝑥 +s 1s ) ∈ 𝐴)

Assertion

Ref	Expression
peano5uzs	⊢ (𝜑 → {𝑘 ∈ ℤs ∣ 𝑁 ≤s 𝑘} ⊆ 𝐴)

Distinct variable groups:   𝑘,𝑁,𝑥   𝜑,𝑥,𝑘   𝑥,𝐴

Allowed substitution hint:   𝐴(𝑘)

Proof of Theorem peano5uzs

Dummy variables 𝑛 𝑦 𝑧 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		breq2 5170	. . . 4 ⊢ (𝑘 = 𝑛 → (𝑁 ≤s 𝑘 ↔ 𝑁 ≤s 𝑛))
2	1	elrab 3708	. . 3 ⊢ (𝑛 ∈ {𝑘 ∈ ℤs ∣ 𝑁 ≤s 𝑘} ↔ (𝑛 ∈ ℤs ∧ 𝑁 ≤s 𝑛))
3		zno 28386	. . . . . . 7 ⊢ (𝑛 ∈ ℤs → 𝑛 ∈ No )
4	3	adantr 480	. . . . . 6 ⊢ ((𝑛 ∈ ℤs ∧ 𝑁 ≤s 𝑛) → 𝑛 ∈ No )
5		peano5uzs.1	. . . . . . 7 ⊢ (𝜑 → 𝑁 ∈ ℤs)
6	5	znod 28387	. . . . . 6 ⊢ (𝜑 → 𝑁 ∈ No )
7		npcans 28123	. . . . . 6 ⊢ ((𝑛 ∈ No ∧ 𝑁 ∈ No ) → ((𝑛 -s 𝑁) +s 𝑁) = 𝑛)
8	4, 6, 7	syl2anr 596	. . . . 5 ⊢ ((𝜑 ∧ (𝑛 ∈ ℤs ∧ 𝑁 ≤s 𝑛)) → ((𝑛 -s 𝑁) +s 𝑁) = 𝑛)
9		simprl 770	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ (𝑛 ∈ ℤs ∧ 𝑁 ≤s 𝑛)) → 𝑛 ∈ ℤs)
10	5	adantr 480	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ (𝑛 ∈ ℤs ∧ 𝑁 ≤s 𝑛)) → 𝑁 ∈ ℤs)
11	9, 10	zsubscld 28400	. . . . . . . . . 10 ⊢ ((𝜑 ∧ (𝑛 ∈ ℤs ∧ 𝑁 ≤s 𝑛)) → (𝑛 -s 𝑁) ∈ ℤs)
12	3	adantl 481	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ 𝑛 ∈ ℤs) → 𝑛 ∈ No )
13	6	adantr 480	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ 𝑛 ∈ ℤs) → 𝑁 ∈ No )
14	12, 13	subsge0d 28147	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ 𝑛 ∈ ℤs) → ( 0s ≤s (𝑛 -s 𝑁) ↔ 𝑁 ≤s 𝑛))
15	14	biimpar 477	. . . . . . . . . . 11 ⊢ (((𝜑 ∧ 𝑛 ∈ ℤs) ∧ 𝑁 ≤s 𝑛) → 0s ≤s (𝑛 -s 𝑁))
16	15	anasss 466	. . . . . . . . . 10 ⊢ ((𝜑 ∧ (𝑛 ∈ ℤs ∧ 𝑁 ≤s 𝑛)) → 0s ≤s (𝑛 -s 𝑁))
17	11, 16	jca 511	. . . . . . . . 9 ⊢ ((𝜑 ∧ (𝑛 ∈ ℤs ∧ 𝑁 ≤s 𝑛)) → ((𝑛 -s 𝑁) ∈ ℤs ∧ 0s ≤s (𝑛 -s 𝑁)))
18		eln0zs 28404	. . . . . . . . 9 ⊢ ((𝑛 -s 𝑁) ∈ ℕ0s ↔ ((𝑛 -s 𝑁) ∈ ℤs ∧ 0s ≤s (𝑛 -s 𝑁)))
19	17, 18	sylibr 234	. . . . . . . 8 ⊢ ((𝜑 ∧ (𝑛 ∈ ℤs ∧ 𝑁 ≤s 𝑛)) → (𝑛 -s 𝑁) ∈ ℕ0s)
20	19	ex 412	. . . . . . 7 ⊢ (𝜑 → ((𝑛 ∈ ℤs ∧ 𝑁 ≤s 𝑛) → (𝑛 -s 𝑁) ∈ ℕ0s))
21		oveq1 7455	. . . . . . . . . . 11 ⊢ (𝑧 = 0s → (𝑧 +s 𝑁) = ( 0s +s 𝑁))
22	21	eleq1d 2829	. . . . . . . . . 10 ⊢ (𝑧 = 0s → ((𝑧 +s 𝑁) ∈ 𝐴 ↔ ( 0s +s 𝑁) ∈ 𝐴))
23	22	imbi2d 340	. . . . . . . . 9 ⊢ (𝑧 = 0s → ((𝜑 → (𝑧 +s 𝑁) ∈ 𝐴) ↔ (𝜑 → ( 0s +s 𝑁) ∈ 𝐴)))
24		oveq1 7455	. . . . . . . . . . 11 ⊢ (𝑧 = 𝑦 → (𝑧 +s 𝑁) = (𝑦 +s 𝑁))
25	24	eleq1d 2829	. . . . . . . . . 10 ⊢ (𝑧 = 𝑦 → ((𝑧 +s 𝑁) ∈ 𝐴 ↔ (𝑦 +s 𝑁) ∈ 𝐴))
26	25	imbi2d 340	. . . . . . . . 9 ⊢ (𝑧 = 𝑦 → ((𝜑 → (𝑧 +s 𝑁) ∈ 𝐴) ↔ (𝜑 → (𝑦 +s 𝑁) ∈ 𝐴)))
27		oveq1 7455	. . . . . . . . . . 11 ⊢ (𝑧 = (𝑦 +s 1s ) → (𝑧 +s 𝑁) = ((𝑦 +s 1s ) +s 𝑁))
28	27	eleq1d 2829	. . . . . . . . . 10 ⊢ (𝑧 = (𝑦 +s 1s ) → ((𝑧 +s 𝑁) ∈ 𝐴 ↔ ((𝑦 +s 1s ) +s 𝑁) ∈ 𝐴))
29	28	imbi2d 340	. . . . . . . . 9 ⊢ (𝑧 = (𝑦 +s 1s ) → ((𝜑 → (𝑧 +s 𝑁) ∈ 𝐴) ↔ (𝜑 → ((𝑦 +s 1s ) +s 𝑁) ∈ 𝐴)))
30		oveq1 7455	. . . . . . . . . . 11 ⊢ (𝑧 = (𝑛 -s 𝑁) → (𝑧 +s 𝑁) = ((𝑛 -s 𝑁) +s 𝑁))
31	30	eleq1d 2829	. . . . . . . . . 10 ⊢ (𝑧 = (𝑛 -s 𝑁) → ((𝑧 +s 𝑁) ∈ 𝐴 ↔ ((𝑛 -s 𝑁) +s 𝑁) ∈ 𝐴))
32	31	imbi2d 340	. . . . . . . . 9 ⊢ (𝑧 = (𝑛 -s 𝑁) → ((𝜑 → (𝑧 +s 𝑁) ∈ 𝐴) ↔ (𝜑 → ((𝑛 -s 𝑁) +s 𝑁) ∈ 𝐴)))
33		addslid 28019	. . . . . . . . . . 11 ⊢ (𝑁 ∈ No → ( 0s +s 𝑁) = 𝑁)
34	6, 33	syl 17	. . . . . . . . . 10 ⊢ (𝜑 → ( 0s +s 𝑁) = 𝑁)
35		peano5uzs.2	. . . . . . . . . 10 ⊢ (𝜑 → 𝑁 ∈ 𝐴)
36	34, 35	eqeltrd 2844	. . . . . . . . 9 ⊢ (𝜑 → ( 0s +s 𝑁) ∈ 𝐴)
37		peano5uzs.3	. . . . . . . . . . . . . . 15 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → (𝑥 +s 1s ) ∈ 𝐴)
38	37	ralrimiva 3152	. . . . . . . . . . . . . 14 ⊢ (𝜑 → ∀𝑥 ∈ 𝐴 (𝑥 +s 1s ) ∈ 𝐴)
39		oveq1 7455	. . . . . . . . . . . . . . . 16 ⊢ (𝑥 = (𝑦 +s 𝑁) → (𝑥 +s 1s ) = ((𝑦 +s 𝑁) +s 1s ))
40	39	eleq1d 2829	. . . . . . . . . . . . . . 15 ⊢ (𝑥 = (𝑦 +s 𝑁) → ((𝑥 +s 1s ) ∈ 𝐴 ↔ ((𝑦 +s 𝑁) +s 1s ) ∈ 𝐴))
41	40	rspccv 3632	. . . . . . . . . . . . . 14 ⊢ (∀𝑥 ∈ 𝐴 (𝑥 +s 1s ) ∈ 𝐴 → ((𝑦 +s 𝑁) ∈ 𝐴 → ((𝑦 +s 𝑁) +s 1s ) ∈ 𝐴))
42	38, 41	syl 17	. . . . . . . . . . . . 13 ⊢ (𝜑 → ((𝑦 +s 𝑁) ∈ 𝐴 → ((𝑦 +s 𝑁) +s 1s ) ∈ 𝐴))
43	42	adantl 481	. . . . . . . . . . . 12 ⊢ ((𝑦 ∈ ℕ0s ∧ 𝜑) → ((𝑦 +s 𝑁) ∈ 𝐴 → ((𝑦 +s 𝑁) +s 1s ) ∈ 𝐴))
44		n0sno 28346	. . . . . . . . . . . . . . 15 ⊢ (𝑦 ∈ ℕ0s → 𝑦 ∈ No )
45	44	adantr 480	. . . . . . . . . . . . . 14 ⊢ ((𝑦 ∈ ℕ0s ∧ 𝜑) → 𝑦 ∈ No )
46		1sno 27890	. . . . . . . . . . . . . . 15 ⊢ 1s ∈ No
47	46	a1i 11	. . . . . . . . . . . . . 14 ⊢ ((𝑦 ∈ ℕ0s ∧ 𝜑) → 1s ∈ No )
48	6	adantl 481	. . . . . . . . . . . . . 14 ⊢ ((𝑦 ∈ ℕ0s ∧ 𝜑) → 𝑁 ∈ No )
49	45, 47, 48	adds32d 28058	. . . . . . . . . . . . 13 ⊢ ((𝑦 ∈ ℕ0s ∧ 𝜑) → ((𝑦 +s 1s ) +s 𝑁) = ((𝑦 +s 𝑁) +s 1s ))
50	49	eleq1d 2829	. . . . . . . . . . . 12 ⊢ ((𝑦 ∈ ℕ0s ∧ 𝜑) → (((𝑦 +s 1s ) +s 𝑁) ∈ 𝐴 ↔ ((𝑦 +s 𝑁) +s 1s ) ∈ 𝐴))
51	43, 50	sylibrd 259	. . . . . . . . . . 11 ⊢ ((𝑦 ∈ ℕ0s ∧ 𝜑) → ((𝑦 +s 𝑁) ∈ 𝐴 → ((𝑦 +s 1s ) +s 𝑁) ∈ 𝐴))
52	51	ex 412	. . . . . . . . . 10 ⊢ (𝑦 ∈ ℕ0s → (𝜑 → ((𝑦 +s 𝑁) ∈ 𝐴 → ((𝑦 +s 1s ) +s 𝑁) ∈ 𝐴)))
53	52	a2d 29	. . . . . . . . 9 ⊢ (𝑦 ∈ ℕ0s → ((𝜑 → (𝑦 +s 𝑁) ∈ 𝐴) → (𝜑 → ((𝑦 +s 1s ) +s 𝑁) ∈ 𝐴)))
54	23, 26, 29, 32, 36, 53	n0sind 28355	. . . . . . . 8 ⊢ ((𝑛 -s 𝑁) ∈ ℕ0s → (𝜑 → ((𝑛 -s 𝑁) +s 𝑁) ∈ 𝐴))
55	54	com12 32	. . . . . . 7 ⊢ (𝜑 → ((𝑛 -s 𝑁) ∈ ℕ0s → ((𝑛 -s 𝑁) +s 𝑁) ∈ 𝐴))
56	20, 55	syld 47	. . . . . 6 ⊢ (𝜑 → ((𝑛 ∈ ℤs ∧ 𝑁 ≤s 𝑛) → ((𝑛 -s 𝑁) +s 𝑁) ∈ 𝐴))
57	56	imp 406	. . . . 5 ⊢ ((𝜑 ∧ (𝑛 ∈ ℤs ∧ 𝑁 ≤s 𝑛)) → ((𝑛 -s 𝑁) +s 𝑁) ∈ 𝐴)
58	8, 57	eqeltrrd 2845	. . . 4 ⊢ ((𝜑 ∧ (𝑛 ∈ ℤs ∧ 𝑁 ≤s 𝑛)) → 𝑛 ∈ 𝐴)
59	58	ex 412	. . 3 ⊢ (𝜑 → ((𝑛 ∈ ℤs ∧ 𝑁 ≤s 𝑛) → 𝑛 ∈ 𝐴))
60	2, 59	biimtrid 242	. 2 ⊢ (𝜑 → (𝑛 ∈ {𝑘 ∈ ℤs ∣ 𝑁 ≤s 𝑘} → 𝑛 ∈ 𝐴))
61	60	ssrdv 4014	1 ⊢ (𝜑 → {𝑘 ∈ ℤs ∣ 𝑁 ≤s 𝑘} ⊆ 𝐴)

Syntax hints:   → wi 4   ∧ wa 395   = wceq 1537   ∈ wcel 2108  ∀wral 3067  {crab 3443   ⊆ wss 3976   class class class wbr 5166  (class class class)co 7448   No csur 27702   ≤s csle 27807   0_s c0s 27885   1_s c1s 27886   +_s cadds 28010   -_s csubs 28070  ℕ_0scnn0s 28336  ℤ_sczs 28382

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1793  ax-4 1807  ax-5 1909  ax-6 1967  ax-7 2007  ax-8 2110  ax-9 2118  ax-10 2141  ax-11 2158  ax-12 2178  ax-ext 2711  ax-rep 5303  ax-sep 5317  ax-nul 5324  ax-pow 5383  ax-pr 5447  ax-un 7770

This theorem depends on definitions:  df-bi 207  df-an 396  df-or 847  df-3or 1088  df-3an 1089  df-tru 1540  df-fal 1550  df-ex 1778  df-nf 1782  df-sb 2065  df-mo 2543  df-eu 2572  df-clab 2718  df-cleq 2732  df-clel 2819  df-nfc 2895  df-ne 2947  df-ral 3068  df-rex 3077  df-rmo 3388  df-reu 3389  df-rab 3444  df-v 3490  df-sbc 3805  df-csb 3922  df-dif 3979  df-un 3981  df-in 3983  df-ss 3993  df-pss 3996  df-nul 4353  df-if 4549  df-pw 4624  df-sn 4649  df-pr 4651  df-tp 4653  df-op 4655  df-ot 4657  df-uni 4932  df-int 4971  df-iun 5017  df-br 5167  df-opab 5229  df-mpt 5250  df-tr 5284  df-id 5593  df-eprel 5599  df-po 5607  df-so 5608  df-fr 5652  df-se 5653  df-we 5654  df-xp 5706  df-rel 5707  df-cnv 5708  df-co 5709  df-dm 5710  df-rn 5711  df-res 5712  df-ima 5713  df-pred 6332  df-ord 6398  df-on 6399  df-lim 6400  df-suc 6401  df-iota 6525  df-fun 6575  df-fn 6576  df-f 6577  df-f1 6578  df-fo 6579  df-f1o 6580  df-fv 6581  df-riota 7404  df-ov 7451  df-oprab 7452  df-mpo 7453  df-om 7904  df-1st 8030  df-2nd 8031  df-frecs 8322  df-wrecs 8353  df-recs 8427  df-rdg 8466  df-1o 8522  df-2o 8523  df-nadd 8722  df-no 27705  df-slt 27706  df-bday 27707  df-sle 27808  df-sslt 27844  df-scut 27846  df-0s 27887  df-1s 27888  df-made 27904  df-old 27905  df-left 27907  df-right 27908  df-norec 27989  df-norec2 28000  df-adds 28011  df-negs 28071  df-subs 28072  df-n0s 28338  df-nns 28339  df-zs 28383

This theorem is referenced by:  uzsind  28409