Theorem peano5uzs 28575

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 5114	. . . 4 ⊢ (𝑘 = 𝑛 → (𝑁 ≤s 𝑘 ↔ 𝑁 ≤s 𝑛))
2	1	elrab 3651	. . 3 ⊢ (𝑛 ∈ {𝑘 ∈ ℤs ∣ 𝑁 ≤s 𝑘} ↔ (𝑛 ∈ ℤs ∧ 𝑁 ≤s 𝑛))
3		zno 28553	. . . . . . 7 ⊢ (𝑛 ∈ ℤs → 𝑛 ∈ No )
4	3	adantr 485	. . . . . 6 ⊢ ((𝑛 ∈ ℤs ∧ 𝑁 ≤s 𝑛) → 𝑛 ∈ No )
5		peano5uzs.1	. . . . . . 7 ⊢ (𝜑 → 𝑁 ∈ ℤs)
6	5	znod 28554	. . . . . 6 ⊢ (𝜑 → 𝑁 ∈ No )
7		npcans 28246	. . . . . 6 ⊢ ((𝑛 ∈ No ∧ 𝑁 ∈ No ) → ((𝑛 -s 𝑁) +s 𝑁) = 𝑛)
8	4, 6, 7	syl2anr 608	. . . . 5 ⊢ ((𝜑 ∧ (𝑛 ∈ ℤs ∧ 𝑁 ≤s 𝑛)) → ((𝑛 -s 𝑁) +s 𝑁) = 𝑛)
9		simprl 782	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ (𝑛 ∈ ℤs ∧ 𝑁 ≤s 𝑛)) → 𝑛 ∈ ℤs)
10	5	adantr 485	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ (𝑛 ∈ ℤs ∧ 𝑁 ≤s 𝑛)) → 𝑁 ∈ ℤs)
11	9, 10	zsubscld 28567	. . . . . . . . . 10 ⊢ ((𝜑 ∧ (𝑛 ∈ ℤs ∧ 𝑁 ≤s 𝑛)) → (𝑛 -s 𝑁) ∈ ℤs)
12	3	adantl 486	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ 𝑛 ∈ ℤs) → 𝑛 ∈ No )
13	6	adantr 485	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ 𝑛 ∈ ℤs) → 𝑁 ∈ No )
14	12, 13	subsge0d 28271	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ 𝑛 ∈ ℤs) → ( 0s ≤s (𝑛 -s 𝑁) ↔ 𝑁 ≤s 𝑛))
15	14	biimpar 482	. . . . . . . . . . 11 ⊢ (((𝜑 ∧ 𝑛 ∈ ℤs) ∧ 𝑁 ≤s 𝑛) → 0s ≤s (𝑛 -s 𝑁))
16	15	anasss 471	. . . . . . . . . 10 ⊢ ((𝜑 ∧ (𝑛 ∈ ℤs ∧ 𝑁 ≤s 𝑛)) → 0s ≤s (𝑛 -s 𝑁))
17	11, 16	jca 520	. . . . . . . . 9 ⊢ ((𝜑 ∧ (𝑛 ∈ ℤs ∧ 𝑁 ≤s 𝑛)) → ((𝑛 -s 𝑁) ∈ ℤs ∧ 0s ≤s (𝑛 -s 𝑁)))
18		eln0zs 28571	. . . . . . . . 9 ⊢ ((𝑛 -s 𝑁) ∈ ℕ0s ↔ ((𝑛 -s 𝑁) ∈ ℤs ∧ 0s ≤s (𝑛 -s 𝑁)))
19	17, 18	sylibr 237	. . . . . . . 8 ⊢ ((𝜑 ∧ (𝑛 ∈ ℤs ∧ 𝑁 ≤s 𝑛)) → (𝑛 -s 𝑁) ∈ ℕ0s)
20	19	ex 417	. . . . . . 7 ⊢ (𝜑 → ((𝑛 ∈ ℤs ∧ 𝑁 ≤s 𝑛) → (𝑛 -s 𝑁) ∈ ℕ0s))
21		oveq1 7419	. . . . . . . . . . 11 ⊢ (𝑧 = 0s → (𝑧 +s 𝑁) = ( 0s +s 𝑁))
22	21	eleq1d 2848	. . . . . . . . . 10 ⊢ (𝑧 = 0s → ((𝑧 +s 𝑁) ∈ 𝐴 ↔ ( 0s +s 𝑁) ∈ 𝐴))
23	22	imbi2d 343	. . . . . . . . 9 ⊢ (𝑧 = 0s → ((𝜑 → (𝑧 +s 𝑁) ∈ 𝐴) ↔ (𝜑 → ( 0s +s 𝑁) ∈ 𝐴)))
24		oveq1 7419	. . . . . . . . . . 11 ⊢ (𝑧 = 𝑦 → (𝑧 +s 𝑁) = (𝑦 +s 𝑁))
25	24	eleq1d 2848	. . . . . . . . . 10 ⊢ (𝑧 = 𝑦 → ((𝑧 +s 𝑁) ∈ 𝐴 ↔ (𝑦 +s 𝑁) ∈ 𝐴))
26	25	imbi2d 343	. . . . . . . . 9 ⊢ (𝑧 = 𝑦 → ((𝜑 → (𝑧 +s 𝑁) ∈ 𝐴) ↔ (𝜑 → (𝑦 +s 𝑁) ∈ 𝐴)))
27		oveq1 7419	. . . . . . . . . . 11 ⊢ (𝑧 = (𝑦 +s 1s ) → (𝑧 +s 𝑁) = ((𝑦 +s 1s ) +s 𝑁))
28	27	eleq1d 2848	. . . . . . . . . 10 ⊢ (𝑧 = (𝑦 +s 1s ) → ((𝑧 +s 𝑁) ∈ 𝐴 ↔ ((𝑦 +s 1s ) +s 𝑁) ∈ 𝐴))
29	28	imbi2d 343	. . . . . . . . 9 ⊢ (𝑧 = (𝑦 +s 1s ) → ((𝜑 → (𝑧 +s 𝑁) ∈ 𝐴) ↔ (𝜑 → ((𝑦 +s 1s ) +s 𝑁) ∈ 𝐴)))
30		oveq1 7419	. . . . . . . . . . 11 ⊢ (𝑧 = (𝑛 -s 𝑁) → (𝑧 +s 𝑁) = ((𝑛 -s 𝑁) +s 𝑁))
31	30	eleq1d 2848	. . . . . . . . . 10 ⊢ (𝑧 = (𝑛 -s 𝑁) → ((𝑧 +s 𝑁) ∈ 𝐴 ↔ ((𝑛 -s 𝑁) +s 𝑁) ∈ 𝐴))
32	31	imbi2d 343	. . . . . . . . 9 ⊢ (𝑧 = (𝑛 -s 𝑁) → ((𝜑 → (𝑧 +s 𝑁) ∈ 𝐴) ↔ (𝜑 → ((𝑛 -s 𝑁) +s 𝑁) ∈ 𝐴)))
33		addslid 28139	. . . . . . . . . . 11 ⊢ (𝑁 ∈ No → ( 0s +s 𝑁) = 𝑁)
34	6, 33	syl 18	. . . . . . . . . 10 ⊢ (𝜑 → ( 0s +s 𝑁) = 𝑁)
35		peano5uzs.2	. . . . . . . . . 10 ⊢ (𝜑 → 𝑁 ∈ 𝐴)
36	34, 35	eqeltrd 2863	. . . . . . . . 9 ⊢ (𝜑 → ( 0s +s 𝑁) ∈ 𝐴)
37		peano5uzs.3	. . . . . . . . . . . . . . 15 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → (𝑥 +s 1s ) ∈ 𝐴)
38	37	ralrimiva 3157	. . . . . . . . . . . . . 14 ⊢ (𝜑 → ∀𝑥 ∈ 𝐴 (𝑥 +s 1s ) ∈ 𝐴)
39		oveq1 7419	. . . . . . . . . . . . . . . 16 ⊢ (𝑥 = (𝑦 +s 𝑁) → (𝑥 +s 1s ) = ((𝑦 +s 𝑁) +s 1s ))
40	39	eleq1d 2848	. . . . . . . . . . . . . . 15 ⊢ (𝑥 = (𝑦 +s 𝑁) → ((𝑥 +s 1s ) ∈ 𝐴 ↔ ((𝑦 +s 𝑁) +s 1s ) ∈ 𝐴))
41	40	rspccv 3579	. . . . . . . . . . . . . 14 ⊢ (∀𝑥 ∈ 𝐴 (𝑥 +s 1s ) ∈ 𝐴 → ((𝑦 +s 𝑁) ∈ 𝐴 → ((𝑦 +s 𝑁) +s 1s ) ∈ 𝐴))
42	38, 41	syl 18	. . . . . . . . . . . . 13 ⊢ (𝜑 → ((𝑦 +s 𝑁) ∈ 𝐴 → ((𝑦 +s 𝑁) +s 1s ) ∈ 𝐴))
43	42	adantl 486	. . . . . . . . . . . 12 ⊢ ((𝑦 ∈ ℕ0s ∧ 𝜑) → ((𝑦 +s 𝑁) ∈ 𝐴 → ((𝑦 +s 𝑁) +s 1s ) ∈ 𝐴))
44		n0no 28494	. . . . . . . . . . . . . . 15 ⊢ (𝑦 ∈ ℕ0s → 𝑦 ∈ No )
45	44	adantr 485	. . . . . . . . . . . . . 14 ⊢ ((𝑦 ∈ ℕ0s ∧ 𝜑) → 𝑦 ∈ No )
46		1no 27981	. . . . . . . . . . . . . . 15 ⊢ 1s ∈ No
47	46	a1i 11	. . . . . . . . . . . . . 14 ⊢ ((𝑦 ∈ ℕ0s ∧ 𝜑) → 1s ∈ No )
48	6	adantl 486	. . . . . . . . . . . . . 14 ⊢ ((𝑦 ∈ ℕ0s ∧ 𝜑) → 𝑁 ∈ No )
49	45, 47, 48	adds32d 28178	. . . . . . . . . . . . 13 ⊢ ((𝑦 ∈ ℕ0s ∧ 𝜑) → ((𝑦 +s 1s ) +s 𝑁) = ((𝑦 +s 𝑁) +s 1s ))
50	49	eleq1d 2848	. . . . . . . . . . . 12 ⊢ ((𝑦 ∈ ℕ0s ∧ 𝜑) → (((𝑦 +s 1s ) +s 𝑁) ∈ 𝐴 ↔ ((𝑦 +s 𝑁) +s 1s ) ∈ 𝐴))
51	43, 50	sylibrd 262	. . . . . . . . . . 11 ⊢ ((𝑦 ∈ ℕ0s ∧ 𝜑) → ((𝑦 +s 𝑁) ∈ 𝐴 → ((𝑦 +s 1s ) +s 𝑁) ∈ 𝐴))
52	51	ex 417	. . . . . . . . . 10 ⊢ (𝑦 ∈ ℕ0s → (𝜑 → ((𝑦 +s 𝑁) ∈ 𝐴 → ((𝑦 +s 1s ) +s 𝑁) ∈ 𝐴)))
53	52	a2d 30	. . . . . . . . 9 ⊢ (𝑦 ∈ ℕ0s → ((𝜑 → (𝑦 +s 𝑁) ∈ 𝐴) → (𝜑 → ((𝑦 +s 1s ) +s 𝑁) ∈ 𝐴)))
54	23, 26, 29, 32, 36, 53	n0sind 28504	. . . . . . . 8 ⊢ ((𝑛 -s 𝑁) ∈ ℕ0s → (𝜑 → ((𝑛 -s 𝑁) +s 𝑁) ∈ 𝐴))
55	54	com12 33	. . . . . . 7 ⊢ (𝜑 → ((𝑛 -s 𝑁) ∈ ℕ0s → ((𝑛 -s 𝑁) +s 𝑁) ∈ 𝐴))
56	20, 55	syld 48	. . . . . 6 ⊢ (𝜑 → ((𝑛 ∈ ℤs ∧ 𝑁 ≤s 𝑛) → ((𝑛 -s 𝑁) +s 𝑁) ∈ 𝐴))
57	56	imp 411	. . . . 5 ⊢ ((𝜑 ∧ (𝑛 ∈ ℤs ∧ 𝑁 ≤s 𝑛)) → ((𝑛 -s 𝑁) +s 𝑁) ∈ 𝐴)
58	8, 57	eqeltrrd 2864	. . . 4 ⊢ ((𝜑 ∧ (𝑛 ∈ ℤs ∧ 𝑁 ≤s 𝑛)) → 𝑛 ∈ 𝐴)
59	58	ex 417	. . 3 ⊢ (𝜑 → ((𝑛 ∈ ℤs ∧ 𝑁 ≤s 𝑛) → 𝑛 ∈ 𝐴))
60	2, 59	biimtrid 245	. 2 ⊢ (𝜑 → (𝑛 ∈ {𝑘 ∈ ℤs ∣ 𝑁 ≤s 𝑘} → 𝑛 ∈ 𝐴))
61	60	ssrdv 3944	1 ⊢ (𝜑 → {𝑘 ∈ ℤs ∣ 𝑁 ≤s 𝑘} ⊆ 𝐴)

Syntax hints:   → wi 4   ∧ wa 400   = wceq 1570   ∈ wcel 2143  ∀wral 3079  {crab 3416   ⊆ wss 3906   class class class wbr 5110  (class class class)co 7412   No csur 27782   ≤s cles 27886   0_s c0s 27976   1_s c1s 27977   +_s cadds 28130   -_s csubs 28191  ℕ_0scn0s 28483  ℤ_sczs 28549

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1825  ax-4 1839  ax-5 1940  ax-6 1997  ax-7 2038  ax-8 2145  ax-9 2153  ax-10 2176  ax-11 2192  ax-12 2213  ax-ext 2735  ax-rep 5239  ax-sep 5258  ax-nul 5270  ax-pow 5338  ax-pr 5406  ax-un 7734

This theorem depends on definitions:  df-bi 210  df-an 401  df-or 861  df-3or 1104  df-3an 1105  df-tru 1573  df-fal 1583  df-ex 1810  df-nf 1814  df-sb 2097  df-mo 2567  df-eu 2597  df-clab 2742  df-cleq 2755  df-clel 2838  df-nfc 2912  df-ne 2959  df-ral 3080  df-rex 3090  df-rmo 3369  df-reu 3370  df-rab 3417  df-v 3457  df-sbc 3746  df-csb 3855  df-dif 3909  df-un 3911  df-in 3913  df-ss 3923  df-pss 3926  df-nul 4288  df-if 4489  df-pw 4565  df-sn 4591  df-pr 4593  df-tp 4595  df-op 4597  df-ot 4599  df-uni 4874  df-int 4914  df-iun 4959  df-br 5111  df-opab 5175  df-mpt 5194  df-tr 5220  df-id 5558  df-eprel 5563  df-po 5571  df-so 5572  df-fr 5616  df-se 5617  df-we 5618  df-xp 5669  df-rel 5670  df-cnv 5671  df-co 5672  df-dm 5673  df-rn 5674  df-res 5675  df-ima 5676  df-pred 6304  df-ord 6365  df-on 6366  df-lim 6367  df-suc 6368  df-iota 6494  df-fun 6540  df-fn 6541  df-f 6542  df-f1 6543  df-fo 6544  df-f1o 6545  df-fv 6546  df-riota 7369  df-ov 7415  df-oprab 7416  df-mpo 7417  df-om 7864  df-1st 7987  df-2nd 7988  df-frecs 8279  df-wrecs 8310  df-recs 8359  df-rdg 8398  df-1o 8454  df-2o 8455  df-nadd 8653  df-no 27785  df-lts 27786  df-bday 27787  df-les 27887  df-slts 27929  df-cuts 27931  df-0s 27978  df-1s 27979  df-made 27998  df-old 27999  df-left 28001  df-right 28002  df-norec 28109  df-norec2 28120  df-adds 28131  df-negs 28192  df-subs 28193  df-n0s 28485  df-nns 28486  df-zs 28550

This theorem is referenced by:  uzsind  28576