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Theorem fzsplit1nn0 37634
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 ∈ ℕ0𝐵 ∈ ℕ0𝐴𝐵) → (1...𝐵) = ((1...𝐴) ∪ ((𝐴 + 1)...𝐵)))

Proof of Theorem fzsplit1nn0
StepHypRef Expression
1 elnn0 11332 . . 3 (𝐴 ∈ ℕ0 ↔ (𝐴 ∈ ℕ ∨ 𝐴 = 0))
2 nnge1 11084 . . . . . . . 8 (𝐴 ∈ ℕ → 1 ≤ 𝐴)
32adantr 480 . . . . . . 7 ((𝐴 ∈ ℕ ∧ (𝐵 ∈ ℕ0𝐴𝐵)) → 1 ≤ 𝐴)
4 simprr 811 . . . . . . 7 ((𝐴 ∈ ℕ ∧ (𝐵 ∈ ℕ0𝐴𝐵)) → 𝐴𝐵)
5 nnz 11437 . . . . . . . . 9 (𝐴 ∈ ℕ → 𝐴 ∈ ℤ)
65adantr 480 . . . . . . . 8 ((𝐴 ∈ ℕ ∧ (𝐵 ∈ ℕ0𝐴𝐵)) → 𝐴 ∈ ℤ)
7 1zzd 11446 . . . . . . . 8 ((𝐴 ∈ ℕ ∧ (𝐵 ∈ ℕ0𝐴𝐵)) → 1 ∈ ℤ)
8 nn0z 11438 . . . . . . . . 9 (𝐵 ∈ ℕ0𝐵 ∈ ℤ)
98ad2antrl 764 . . . . . . . 8 ((𝐴 ∈ ℕ ∧ (𝐵 ∈ ℕ0𝐴𝐵)) → 𝐵 ∈ ℤ)
10 elfz 12370 . . . . . . . 8 ((𝐴 ∈ ℤ ∧ 1 ∈ ℤ ∧ 𝐵 ∈ ℤ) → (𝐴 ∈ (1...𝐵) ↔ (1 ≤ 𝐴𝐴𝐵)))
116, 7, 9, 10syl3anc 1366 . . . . . . 7 ((𝐴 ∈ ℕ ∧ (𝐵 ∈ ℕ0𝐴𝐵)) → (𝐴 ∈ (1...𝐵) ↔ (1 ≤ 𝐴𝐴𝐵)))
123, 4, 11mpbir2and 977 . . . . . 6 ((𝐴 ∈ ℕ ∧ (𝐵 ∈ ℕ0𝐴𝐵)) → 𝐴 ∈ (1...𝐵))
13 fzsplit 12405 . . . . . 6 (𝐴 ∈ (1...𝐵) → (1...𝐵) = ((1...𝐴) ∪ ((𝐴 + 1)...𝐵)))
1412, 13syl 17 . . . . 5 ((𝐴 ∈ ℕ ∧ (𝐵 ∈ ℕ0𝐴𝐵)) → (1...𝐵) = ((1...𝐴) ∪ ((𝐴 + 1)...𝐵)))
15 uncom 3790 . . . . . 6 ((1...𝐴) ∪ ((𝐴 + 1)...𝐵)) = (((𝐴 + 1)...𝐵) ∪ (1...𝐴))
16 oveq1 6697 . . . . . . . . . . 11 (𝐴 = 0 → (𝐴 + 1) = (0 + 1))
1716adantr 480 . . . . . . . . . 10 ((𝐴 = 0 ∧ (𝐵 ∈ ℕ0𝐴𝐵)) → (𝐴 + 1) = (0 + 1))
18 0p1e1 11170 . . . . . . . . . 10 (0 + 1) = 1
1917, 18syl6eq 2701 . . . . . . . . 9 ((𝐴 = 0 ∧ (𝐵 ∈ ℕ0𝐴𝐵)) → (𝐴 + 1) = 1)
2019oveq1d 6705 . . . . . . . 8 ((𝐴 = 0 ∧ (𝐵 ∈ ℕ0𝐴𝐵)) → ((𝐴 + 1)...𝐵) = (1...𝐵))
21 oveq2 6698 . . . . . . . . . 10 (𝐴 = 0 → (1...𝐴) = (1...0))
2221adantr 480 . . . . . . . . 9 ((𝐴 = 0 ∧ (𝐵 ∈ ℕ0𝐴𝐵)) → (1...𝐴) = (1...0))
23 fz10 12400 . . . . . . . . 9 (1...0) = ∅
2422, 23syl6eq 2701 . . . . . . . 8 ((𝐴 = 0 ∧ (𝐵 ∈ ℕ0𝐴𝐵)) → (1...𝐴) = ∅)
2520, 24uneq12d 3801 . . . . . . 7 ((𝐴 = 0 ∧ (𝐵 ∈ ℕ0𝐴𝐵)) → (((𝐴 + 1)...𝐵) ∪ (1...𝐴)) = ((1...𝐵) ∪ ∅))
26 un0 4000 . . . . . . 7 ((1...𝐵) ∪ ∅) = (1...𝐵)
2725, 26syl6eq 2701 . . . . . 6 ((𝐴 = 0 ∧ (𝐵 ∈ ℕ0𝐴𝐵)) → (((𝐴 + 1)...𝐵) ∪ (1...𝐴)) = (1...𝐵))
2815, 27syl5req 2698 . . . . 5 ((𝐴 = 0 ∧ (𝐵 ∈ ℕ0𝐴𝐵)) → (1...𝐵) = ((1...𝐴) ∪ ((𝐴 + 1)...𝐵)))
2914, 28jaoian 841 . . . 4 (((𝐴 ∈ ℕ ∨ 𝐴 = 0) ∧ (𝐵 ∈ ℕ0𝐴𝐵)) → (1...𝐵) = ((1...𝐴) ∪ ((𝐴 + 1)...𝐵)))
3029ex 449 . . 3 ((𝐴 ∈ ℕ ∨ 𝐴 = 0) → ((𝐵 ∈ ℕ0𝐴𝐵) → (1...𝐵) = ((1...𝐴) ∪ ((𝐴 + 1)...𝐵))))
311, 30sylbi 207 . 2 (𝐴 ∈ ℕ0 → ((𝐵 ∈ ℕ0𝐴𝐵) → (1...𝐵) = ((1...𝐴) ∪ ((𝐴 + 1)...𝐵))))
32313impib 1281 1 ((𝐴 ∈ ℕ0𝐵 ∈ ℕ0𝐴𝐵) → (1...𝐵) = ((1...𝐴) ∪ ((𝐴 + 1)...𝐵)))
Colors of variables: wff setvar class
Syntax hints:  wi 4  wb 196  wo 382  wa 383  w3a 1054   = wceq 1523  wcel 2030  cun 3605  c0 3948   class class class wbr 4685  (class class class)co 6690  0cc0 9974  1c1 9975   + caddc 9977  cle 10113  cn 11058  0cn0 11330  cz 11415  ...cfz 12364
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1762  ax-4 1777  ax-5 1879  ax-6 1945  ax-7 1981  ax-8 2032  ax-9 2039  ax-10 2059  ax-11 2074  ax-12 2087  ax-13 2282  ax-ext 2631  ax-sep 4814  ax-nul 4822  ax-pow 4873  ax-pr 4936  ax-un 6991  ax-cnex 10030  ax-resscn 10031  ax-1cn 10032  ax-icn 10033  ax-addcl 10034  ax-addrcl 10035  ax-mulcl 10036  ax-mulrcl 10037  ax-mulcom 10038  ax-addass 10039  ax-mulass 10040  ax-distr 10041  ax-i2m1 10042  ax-1ne0 10043  ax-1rid 10044  ax-rnegex 10045  ax-rrecex 10046  ax-cnre 10047  ax-pre-lttri 10048  ax-pre-lttrn 10049  ax-pre-ltadd 10050  ax-pre-mulgt0 10051
This theorem depends on definitions:  df-bi 197  df-or 384  df-an 385  df-3or 1055  df-3an 1056  df-tru 1526  df-ex 1745  df-nf 1750  df-sb 1938  df-eu 2502  df-mo 2503  df-clab 2638  df-cleq 2644  df-clel 2647  df-nfc 2782  df-ne 2824  df-nel 2927  df-ral 2946  df-rex 2947  df-reu 2948  df-rab 2950  df-v 3233  df-sbc 3469  df-csb 3567  df-dif 3610  df-un 3612  df-in 3614  df-ss 3621  df-pss 3623  df-nul 3949  df-if 4120  df-pw 4193  df-sn 4211  df-pr 4213  df-tp 4215  df-op 4217  df-uni 4469  df-iun 4554  df-br 4686  df-opab 4746  df-mpt 4763  df-tr 4786  df-id 5053  df-eprel 5058  df-po 5064  df-so 5065  df-fr 5102  df-we 5104  df-xp 5149  df-rel 5150  df-cnv 5151  df-co 5152  df-dm 5153  df-rn 5154  df-res 5155  df-ima 5156  df-pred 5718  df-ord 5764  df-on 5765  df-lim 5766  df-suc 5767  df-iota 5889  df-fun 5928  df-fn 5929  df-f 5930  df-f1 5931  df-fo 5932  df-f1o 5933  df-fv 5934  df-riota 6651  df-ov 6693  df-oprab 6694  df-mpt2 6695  df-om 7108  df-1st 7210  df-2nd 7211  df-wrecs 7452  df-recs 7513  df-rdg 7551  df-er 7787  df-en 7998  df-dom 7999  df-sdom 8000  df-pnf 10114  df-mnf 10115  df-xr 10116  df-ltxr 10117  df-le 10118  df-sub 10306  df-neg 10307  df-nn 11059  df-n0 11331  df-z 11416  df-uz 11726  df-fz 12365
This theorem is referenced by:  eldioph2lem1  37640
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