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Theorem fz0fzdiffz0 9270
 Description: The difference of an integer in a finite set of sequential nonnegative integers and and an integer of a finite set of sequential integers with the same upper bound and the nonnegative integer as lower bound is a member of the finite set of sequential nonnegative integers. (Contributed by Alexander van der Vekens, 6-Jun-2018.)
Assertion
Ref Expression
fz0fzdiffz0 ((𝑀 ∈ (0...𝑁) ∧ 𝐾 ∈ (𝑀...𝑁)) → (𝐾𝑀) ∈ (0...𝑁))

Proof of Theorem fz0fzdiffz0
StepHypRef Expression
1 fz0fzelfz0 9267 . . 3 ((𝑀 ∈ (0...𝑁) ∧ 𝐾 ∈ (𝑀...𝑁)) → 𝐾 ∈ (0...𝑁))
2 elfzle1 9174 . . . . . . 7 (𝐾 ∈ (𝑀...𝑁) → 𝑀𝐾)
32adantl 271 . . . . . 6 ((𝑀 ∈ (0...𝑁) ∧ 𝐾 ∈ (𝑀...𝑁)) → 𝑀𝐾)
43adantl 271 . . . . 5 ((𝐾 ∈ (0...𝑁) ∧ (𝑀 ∈ (0...𝑁) ∧ 𝐾 ∈ (𝑀...𝑁))) → 𝑀𝐾)
5 elfznn0 9259 . . . . . . 7 (𝑀 ∈ (0...𝑁) → 𝑀 ∈ ℕ0)
65adantr 270 . . . . . 6 ((𝑀 ∈ (0...𝑁) ∧ 𝐾 ∈ (𝑀...𝑁)) → 𝑀 ∈ ℕ0)
7 elfznn0 9259 . . . . . 6 (𝐾 ∈ (0...𝑁) → 𝐾 ∈ ℕ0)
8 nn0sub 8550 . . . . . 6 ((𝑀 ∈ ℕ0𝐾 ∈ ℕ0) → (𝑀𝐾 ↔ (𝐾𝑀) ∈ ℕ0))
96, 7, 8syl2anr 284 . . . . 5 ((𝐾 ∈ (0...𝑁) ∧ (𝑀 ∈ (0...𝑁) ∧ 𝐾 ∈ (𝑀...𝑁))) → (𝑀𝐾 ↔ (𝐾𝑀) ∈ ℕ0))
104, 9mpbid 145 . . . 4 ((𝐾 ∈ (0...𝑁) ∧ (𝑀 ∈ (0...𝑁) ∧ 𝐾 ∈ (𝑀...𝑁))) → (𝐾𝑀) ∈ ℕ0)
11 elfz3nn0 9260 . . . . 5 (𝐾 ∈ (0...𝑁) → 𝑁 ∈ ℕ0)
1211adantr 270 . . . 4 ((𝐾 ∈ (0...𝑁) ∧ (𝑀 ∈ (0...𝑁) ∧ 𝐾 ∈ (𝑀...𝑁))) → 𝑁 ∈ ℕ0)
13 elfz2nn0 9257 . . . . . . 7 (𝑀 ∈ (0...𝑁) ↔ (𝑀 ∈ ℕ0𝑁 ∈ ℕ0𝑀𝑁))
14 elfz2 9164 . . . . . . . . . . 11 (𝐾 ∈ (𝑀...𝑁) ↔ ((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ ∧ 𝐾 ∈ ℤ) ∧ (𝑀𝐾𝐾𝑁)))
15 zsubcl 8525 . . . . . . . . . . . . . . . . . . . . . . 23 ((𝐾 ∈ ℤ ∧ 𝑀 ∈ ℤ) → (𝐾𝑀) ∈ ℤ)
1615zred 8602 . . . . . . . . . . . . . . . . . . . . . 22 ((𝐾 ∈ ℤ ∧ 𝑀 ∈ ℤ) → (𝐾𝑀) ∈ ℝ)
1716ancoms 264 . . . . . . . . . . . . . . . . . . . . 21 ((𝑀 ∈ ℤ ∧ 𝐾 ∈ ℤ) → (𝐾𝑀) ∈ ℝ)
18173adant2 958 . . . . . . . . . . . . . . . . . . . 20 ((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ ∧ 𝐾 ∈ ℤ) → (𝐾𝑀) ∈ ℝ)
19 zre 8488 . . . . . . . . . . . . . . . . . . . . 21 (𝐾 ∈ ℤ → 𝐾 ∈ ℝ)
20193ad2ant3 962 . . . . . . . . . . . . . . . . . . . 20 ((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ ∧ 𝐾 ∈ ℤ) → 𝐾 ∈ ℝ)
21 zre 8488 . . . . . . . . . . . . . . . . . . . . 21 (𝑁 ∈ ℤ → 𝑁 ∈ ℝ)
22213ad2ant2 961 . . . . . . . . . . . . . . . . . . . 20 ((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ ∧ 𝐾 ∈ ℤ) → 𝑁 ∈ ℝ)
2318, 20, 223jca 1119 . . . . . . . . . . . . . . . . . . 19 ((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ ∧ 𝐾 ∈ ℤ) → ((𝐾𝑀) ∈ ℝ ∧ 𝐾 ∈ ℝ ∧ 𝑁 ∈ ℝ))
2423adantr 270 . . . . . . . . . . . . . . . . . 18 (((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ ∧ 𝐾 ∈ ℤ) ∧ 𝑀 ∈ ℕ0) → ((𝐾𝑀) ∈ ℝ ∧ 𝐾 ∈ ℝ ∧ 𝑁 ∈ ℝ))
2524adantr 270 . . . . . . . . . . . . . . . . 17 ((((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ ∧ 𝐾 ∈ ℤ) ∧ 𝑀 ∈ ℕ0) ∧ 𝐾𝑁) → ((𝐾𝑀) ∈ ℝ ∧ 𝐾 ∈ ℝ ∧ 𝑁 ∈ ℝ))
26 nn0ge0 8432 . . . . . . . . . . . . . . . . . . . 20 (𝑀 ∈ ℕ0 → 0 ≤ 𝑀)
2726adantl 271 . . . . . . . . . . . . . . . . . . 19 (((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ ∧ 𝐾 ∈ ℤ) ∧ 𝑀 ∈ ℕ0) → 0 ≤ 𝑀)
28 nn0re 8416 . . . . . . . . . . . . . . . . . . . 20 (𝑀 ∈ ℕ0𝑀 ∈ ℝ)
29 subge02 7701 . . . . . . . . . . . . . . . . . . . 20 ((𝐾 ∈ ℝ ∧ 𝑀 ∈ ℝ) → (0 ≤ 𝑀 ↔ (𝐾𝑀) ≤ 𝐾))
3020, 28, 29syl2an 283 . . . . . . . . . . . . . . . . . . 19 (((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ ∧ 𝐾 ∈ ℤ) ∧ 𝑀 ∈ ℕ0) → (0 ≤ 𝑀 ↔ (𝐾𝑀) ≤ 𝐾))
3127, 30mpbid 145 . . . . . . . . . . . . . . . . . 18 (((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ ∧ 𝐾 ∈ ℤ) ∧ 𝑀 ∈ ℕ0) → (𝐾𝑀) ≤ 𝐾)
3231anim1i 333 . . . . . . . . . . . . . . . . 17 ((((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ ∧ 𝐾 ∈ ℤ) ∧ 𝑀 ∈ ℕ0) ∧ 𝐾𝑁) → ((𝐾𝑀) ≤ 𝐾𝐾𝑁))
33 letr 7313 . . . . . . . . . . . . . . . . 17 (((𝐾𝑀) ∈ ℝ ∧ 𝐾 ∈ ℝ ∧ 𝑁 ∈ ℝ) → (((𝐾𝑀) ≤ 𝐾𝐾𝑁) → (𝐾𝑀) ≤ 𝑁))
3425, 32, 33sylc 61 . . . . . . . . . . . . . . . 16 ((((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ ∧ 𝐾 ∈ ℤ) ∧ 𝑀 ∈ ℕ0) ∧ 𝐾𝑁) → (𝐾𝑀) ≤ 𝑁)
3534exp31 356 . . . . . . . . . . . . . . 15 ((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ ∧ 𝐾 ∈ ℤ) → (𝑀 ∈ ℕ0 → (𝐾𝑁 → (𝐾𝑀) ≤ 𝑁)))
3635a1i 9 . . . . . . . . . . . . . 14 (𝑁 ∈ ℕ0 → ((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ ∧ 𝐾 ∈ ℤ) → (𝑀 ∈ ℕ0 → (𝐾𝑁 → (𝐾𝑀) ≤ 𝑁))))
3736com14 87 . . . . . . . . . . . . 13 (𝐾𝑁 → ((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ ∧ 𝐾 ∈ ℤ) → (𝑀 ∈ ℕ0 → (𝑁 ∈ ℕ0 → (𝐾𝑀) ≤ 𝑁))))
3837adantl 271 . . . . . . . . . . . 12 ((𝑀𝐾𝐾𝑁) → ((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ ∧ 𝐾 ∈ ℤ) → (𝑀 ∈ ℕ0 → (𝑁 ∈ ℕ0 → (𝐾𝑀) ≤ 𝑁))))
3938impcom 123 . . . . . . . . . . 11 (((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ ∧ 𝐾 ∈ ℤ) ∧ (𝑀𝐾𝐾𝑁)) → (𝑀 ∈ ℕ0 → (𝑁 ∈ ℕ0 → (𝐾𝑀) ≤ 𝑁)))
4014, 39sylbi 119 . . . . . . . . . 10 (𝐾 ∈ (𝑀...𝑁) → (𝑀 ∈ ℕ0 → (𝑁 ∈ ℕ0 → (𝐾𝑀) ≤ 𝑁)))
4140com13 79 . . . . . . . . 9 (𝑁 ∈ ℕ0 → (𝑀 ∈ ℕ0 → (𝐾 ∈ (𝑀...𝑁) → (𝐾𝑀) ≤ 𝑁)))
4241impcom 123 . . . . . . . 8 ((𝑀 ∈ ℕ0𝑁 ∈ ℕ0) → (𝐾 ∈ (𝑀...𝑁) → (𝐾𝑀) ≤ 𝑁))
43423adant3 959 . . . . . . 7 ((𝑀 ∈ ℕ0𝑁 ∈ ℕ0𝑀𝑁) → (𝐾 ∈ (𝑀...𝑁) → (𝐾𝑀) ≤ 𝑁))
4413, 43sylbi 119 . . . . . 6 (𝑀 ∈ (0...𝑁) → (𝐾 ∈ (𝑀...𝑁) → (𝐾𝑀) ≤ 𝑁))
4544imp 122 . . . . 5 ((𝑀 ∈ (0...𝑁) ∧ 𝐾 ∈ (𝑀...𝑁)) → (𝐾𝑀) ≤ 𝑁)
4645adantl 271 . . . 4 ((𝐾 ∈ (0...𝑁) ∧ (𝑀 ∈ (0...𝑁) ∧ 𝐾 ∈ (𝑀...𝑁))) → (𝐾𝑀) ≤ 𝑁)
4710, 12, 463jca 1119 . . 3 ((𝐾 ∈ (0...𝑁) ∧ (𝑀 ∈ (0...𝑁) ∧ 𝐾 ∈ (𝑀...𝑁))) → ((𝐾𝑀) ∈ ℕ0𝑁 ∈ ℕ0 ∧ (𝐾𝑀) ≤ 𝑁))
481, 47mpancom 413 . 2 ((𝑀 ∈ (0...𝑁) ∧ 𝐾 ∈ (𝑀...𝑁)) → ((𝐾𝑀) ∈ ℕ0𝑁 ∈ ℕ0 ∧ (𝐾𝑀) ≤ 𝑁))
49 elfz2nn0 9257 . 2 ((𝐾𝑀) ∈ (0...𝑁) ↔ ((𝐾𝑀) ∈ ℕ0𝑁 ∈ ℕ0 ∧ (𝐾𝑀) ≤ 𝑁))
5048, 49sylibr 132 1 ((𝑀 ∈ (0...𝑁) ∧ 𝐾 ∈ (𝑀...𝑁)) → (𝐾𝑀) ∈ (0...𝑁))
 Colors of variables: wff set class Syntax hints:   → wi 4   ∧ wa 102   ↔ wb 103   ∧ w3a 920   ∈ wcel 1434   class class class wbr 3805  (class class class)co 5563  ℝcr 7094  0cc0 7095   ≤ cle 7268   − cmin 7398  ℕ0cn0 8407  ℤcz 8484  ...cfz 9157 This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-mp 7  ax-ia1 104  ax-ia2 105  ax-ia3 106  ax-in1 577  ax-in2 578  ax-io 663  ax-5 1377  ax-7 1378  ax-gen 1379  ax-ie1 1423  ax-ie2 1424  ax-8 1436  ax-10 1437  ax-11 1438  ax-i12 1439  ax-bndl 1440  ax-4 1441  ax-13 1445  ax-14 1446  ax-17 1460  ax-i9 1464  ax-ial 1468  ax-i5r 1469  ax-ext 2065  ax-sep 3916  ax-pow 3968  ax-pr 3992  ax-un 4216  ax-setind 4308  ax-cnex 7181  ax-resscn 7182  ax-1cn 7183  ax-1re 7184  ax-icn 7185  ax-addcl 7186  ax-addrcl 7187  ax-mulcl 7188  ax-addcom 7190  ax-addass 7192  ax-distr 7194  ax-i2m1 7195  ax-0lt1 7196  ax-0id 7198  ax-rnegex 7199  ax-cnre 7201  ax-pre-ltirr 7202  ax-pre-ltwlin 7203  ax-pre-lttrn 7204  ax-pre-ltadd 7206 This theorem depends on definitions:  df-bi 115  df-3or 921  df-3an 922  df-tru 1288  df-fal 1291  df-nf 1391  df-sb 1688  df-eu 1946  df-mo 1947  df-clab 2070  df-cleq 2076  df-clel 2079  df-nfc 2212  df-ne 2250  df-nel 2345  df-ral 2358  df-rex 2359  df-reu 2360  df-rab 2362  df-v 2612  df-sbc 2825  df-dif 2984  df-un 2986  df-in 2988  df-ss 2995  df-pw 3402  df-sn 3422  df-pr 3423  df-op 3425  df-uni 3622  df-int 3657  df-br 3806  df-opab 3860  df-mpt 3861  df-id 4076  df-xp 4397  df-rel 4398  df-cnv 4399  df-co 4400  df-dm 4401  df-rn 4402  df-res 4403  df-ima 4404  df-iota 4917  df-fun 4954  df-fn 4955  df-f 4956  df-fv 4960  df-riota 5519  df-ov 5566  df-oprab 5567  df-mpt2 5568  df-pnf 7269  df-mnf 7270  df-xr 7271  df-ltxr 7272  df-le 7273  df-sub 7400  df-neg 7401  df-inn 8159  df-n0 8408  df-z 8485  df-uz 8753  df-fz 9158 This theorem is referenced by: (None)
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