Theorem fzsplit1nn0 43347

Description: Split a finite 1-based set of integers in the middle, allowing either end to be empty ((1...0)). (Contributed by Stefan O'Rear, 8-Oct-2014.)

Assertion

Ref	Expression
fzsplit1nn0	⊢ ((𝐴 ∈ ℕ0 ∧ 𝐵 ∈ ℕ0 ∧ 𝐴 ≤ 𝐵) → (1...𝐵) = ((1...𝐴) ∪ ((𝐴 + 1)...𝐵)))

Proof of Theorem fzsplit1nn0

Step	Hyp	Ref	Expression
1		elnn0 12497	. . 3 ⊢ (𝐴 ∈ ℕ0 ↔ (𝐴 ∈ ℕ ∨ 𝐴 = 0))
2		1zzd 12616	. . . . . . 7 ⊢ ((𝐴 ∈ ℕ ∧ (𝐵 ∈ ℕ0 ∧ 𝐴 ≤ 𝐵)) → 1 ∈ ℤ)
3		nn0z 12606	. . . . . . . 8 ⊢ (𝐵 ∈ ℕ0 → 𝐵 ∈ ℤ)
4	3	ad2antrl 740	. . . . . . 7 ⊢ ((𝐴 ∈ ℕ ∧ (𝐵 ∈ ℕ0 ∧ 𝐴 ≤ 𝐵)) → 𝐵 ∈ ℤ)
5		nnz 12603	. . . . . . . 8 ⊢ (𝐴 ∈ ℕ → 𝐴 ∈ ℤ)
6	5	adantr 485	. . . . . . 7 ⊢ ((𝐴 ∈ ℕ ∧ (𝐵 ∈ ℕ0 ∧ 𝐴 ≤ 𝐵)) → 𝐴 ∈ ℤ)
7		nnge1 12255	. . . . . . . 8 ⊢ (𝐴 ∈ ℕ → 1 ≤ 𝐴)
8	7	adantr 485	. . . . . . 7 ⊢ ((𝐴 ∈ ℕ ∧ (𝐵 ∈ ℕ0 ∧ 𝐴 ≤ 𝐵)) → 1 ≤ 𝐴)
9		simprr 784	. . . . . . 7 ⊢ ((𝐴 ∈ ℕ ∧ (𝐵 ∈ ℕ0 ∧ 𝐴 ≤ 𝐵)) → 𝐴 ≤ 𝐵)
10	2, 4, 6, 8, 9	elfzd 13534	. . . . . 6 ⊢ ((𝐴 ∈ ℕ ∧ (𝐵 ∈ ℕ0 ∧ 𝐴 ≤ 𝐵)) → 𝐴 ∈ (1...𝐵))
11		fzsplit 13569	. . . . . 6 ⊢ (𝐴 ∈ (1...𝐵) → (1...𝐵) = ((1...𝐴) ∪ ((𝐴 + 1)...𝐵)))
12	10, 11	syl 18	. . . . 5 ⊢ ((𝐴 ∈ ℕ ∧ (𝐵 ∈ ℕ0 ∧ 𝐴 ≤ 𝐵)) → (1...𝐵) = ((1...𝐴) ∪ ((𝐴 + 1)...𝐵)))
13		uncom 4114	. . . . . 6 ⊢ ((1...𝐴) ∪ ((𝐴 + 1)...𝐵)) = (((𝐴 + 1)...𝐵) ∪ (1...𝐴))
14		oveq1 7407	. . . . . . . . . . 11 ⊢ (𝐴 = 0 → (𝐴 + 1) = (0 + 1))
15	14	adantr 485	. . . . . . . . . 10 ⊢ ((𝐴 = 0 ∧ (𝐵 ∈ ℕ0 ∧ 𝐴 ≤ 𝐵)) → (𝐴 + 1) = (0 + 1))
16		0p1e1 12352	. . . . . . . . . 10 ⊢ (0 + 1) = 1
17	15, 16	eqtrdi 2816	. . . . . . . . 9 ⊢ ((𝐴 = 0 ∧ (𝐵 ∈ ℕ0 ∧ 𝐴 ≤ 𝐵)) → (𝐴 + 1) = 1)
18	17	oveq1d 7415	. . . . . . . 8 ⊢ ((𝐴 = 0 ∧ (𝐵 ∈ ℕ0 ∧ 𝐴 ≤ 𝐵)) → ((𝐴 + 1)...𝐵) = (1...𝐵))
19		oveq2 7408	. . . . . . . . . 10 ⊢ (𝐴 = 0 → (1...𝐴) = (1...0))
20	19	adantr 485	. . . . . . . . 9 ⊢ ((𝐴 = 0 ∧ (𝐵 ∈ ℕ0 ∧ 𝐴 ≤ 𝐵)) → (1...𝐴) = (1...0))
21		fz10 13564	. . . . . . . . 9 ⊢ (1...0) = ∅
22	20, 21	eqtrdi 2816	. . . . . . . 8 ⊢ ((𝐴 = 0 ∧ (𝐵 ∈ ℕ0 ∧ 𝐴 ≤ 𝐵)) → (1...𝐴) = ∅)
23	18, 22	uneq12d 4125	. . . . . . 7 ⊢ ((𝐴 = 0 ∧ (𝐵 ∈ ℕ0 ∧ 𝐴 ≤ 𝐵)) → (((𝐴 + 1)...𝐵) ∪ (1...𝐴)) = ((1...𝐵) ∪ ∅))
24		un0 4351	. . . . . . 7 ⊢ ((1...𝐵) ∪ ∅) = (1...𝐵)
25	23, 24	eqtrdi 2816	. . . . . 6 ⊢ ((𝐴 = 0 ∧ (𝐵 ∈ ℕ0 ∧ 𝐴 ≤ 𝐵)) → (((𝐴 + 1)...𝐵) ∪ (1...𝐴)) = (1...𝐵))
26	13, 25	eqtr2id 2813	. . . . 5 ⊢ ((𝐴 = 0 ∧ (𝐵 ∈ ℕ0 ∧ 𝐴 ≤ 𝐵)) → (1...𝐵) = ((1...𝐴) ∪ ((𝐴 + 1)...𝐵)))
27	12, 26	jaoian 971	. . . 4 ⊢ (((𝐴 ∈ ℕ ∨ 𝐴 = 0) ∧ (𝐵 ∈ ℕ0 ∧ 𝐴 ≤ 𝐵)) → (1...𝐵) = ((1...𝐴) ∪ ((𝐴 + 1)...𝐵)))
28	27	ex 417	. . 3 ⊢ ((𝐴 ∈ ℕ ∨ 𝐴 = 0) → ((𝐵 ∈ ℕ0 ∧ 𝐴 ≤ 𝐵) → (1...𝐵) = ((1...𝐴) ∪ ((𝐴 + 1)...𝐵))))
29	1, 28	sylbi 220	. 2 ⊢ (𝐴 ∈ ℕ0 → ((𝐵 ∈ ℕ0 ∧ 𝐴 ≤ 𝐵) → (1...𝐵) = ((1...𝐴) ∪ ((𝐴 + 1)...𝐵))))
30	29	3impib 1132	1 ⊢ ((𝐴 ∈ ℕ0 ∧ 𝐵 ∈ ℕ0 ∧ 𝐴 ≤ 𝐵) → (1...𝐵) = ((1...𝐴) ∪ ((𝐴 + 1)...𝐵)))

Syntax hints:   → wi 4   ∧ wa 400   ∨ wo 860   ∧ w3a 1101   = wceq 1563   ∈ wcel 2145   ∪ cun 3905  ∅c0 4288   class class class wbr 5105  (class class class)co 7400  0cc0 11088  1c1 11089   + caddc 11091   ≤ cle 11232  ℕcn 12224  ℕ₀cn0 12495  ℤcz 12582  ...cfz 13526

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1818  ax-4 1832  ax-5 1933  ax-6 1990  ax-7 2031  ax-8 2147  ax-9 2155  ax-10 2178  ax-11 2194  ax-12 2215  ax-ext 2737  ax-sep 5251  ax-nul 5261  ax-pow 5327  ax-pr 5395  ax-un 7722  ax-cnex 11144  ax-resscn 11145  ax-1cn 11146  ax-icn 11147  ax-addcl 11148  ax-addrcl 11149  ax-mulcl 11150  ax-mulrcl 11151  ax-mulcom 11152  ax-addass 11153  ax-mulass 11154  ax-distr 11155  ax-i2m1 11156  ax-1ne0 11157  ax-1rid 11158  ax-rnegex 11159  ax-rrecex 11160  ax-cnre 11161  ax-pre-lttri 11162  ax-pre-lttrn 11163  ax-pre-ltadd 11164  ax-pre-mulgt0 11165

This theorem depends on definitions:  df-bi 210  df-an 401  df-or 861  df-3or 1102  df-3an 1103  df-tru 1566  df-fal 1576  df-ex 1803  df-nf 1807  df-sb 2094  df-mo 2569  df-eu 2599  df-clab 2744  df-cleq 2757  df-clel 2840  df-nfc 2914  df-ne 2961  df-nel 3065  df-ral 3080  df-rex 3090  df-reu 3371  df-rab 3418  df-v 3459  df-sbc 3748  df-csb 3856  df-dif 3910  df-un 3912  df-in 3914  df-ss 3924  df-pss 3927  df-nul 4289  df-if 4484  df-pw 4560  df-sn 4586  df-pr 4588  df-op 4592  df-uni 4869  df-iun 4954  df-br 5106  df-opab 5168  df-mpt 5187  df-tr 5213  df-id 5547  df-eprel 5552  df-po 5560  df-so 5561  df-fr 5605  df-we 5607  df-xp 5658  df-rel 5659  df-cnv 5660  df-co 5661  df-dm 5662  df-rn 5663  df-res 5664  df-ima 5665  df-pred 6292  df-ord 6353  df-on 6354  df-lim 6355  df-suc 6356  df-iota 6481  df-fun 6527  df-fn 6528  df-f 6529  df-f1 6530  df-fo 6531  df-f1o 6532  df-fv 6533  df-riota 7357  df-ov 7403  df-oprab 7404  df-mpo 7405  df-om 7851  df-1st 7974  df-2nd 7975  df-frecs 8266  df-wrecs 8297  df-recs 8346  df-rdg 8385  df-er 8682  df-en 8932  df-dom 8933  df-sdom 8934  df-pnf 11233  df-mnf 11234  df-xr 11235  df-ltxr 11236  df-le 11237  df-sub 11431  df-neg 11432  df-nn 12225  df-n0 12496  df-z 12583  df-uz 12854  df-fz 13527

This theorem is referenced by:  eldioph2lem1  43353