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| Mirrors > Home > MPE Home > Th. List > uzm1 | Structured version Visualization version GIF version | ||
| Description: Choices for an element of an upper interval of integers. (Contributed by Jeff Madsen, 2-Sep-2009.) |
| Ref | Expression |
|---|---|
| uzm1 | ⊢ (𝑁 ∈ (ℤ≥‘𝑀) → (𝑁 = 𝑀 ∨ (𝑁 − 1) ∈ (ℤ≥‘𝑀))) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | eluzel2 12770 | . . . . 5 ⊢ (𝑁 ∈ (ℤ≥‘𝑀) → 𝑀 ∈ ℤ) | |
| 2 | 1 | a1d 25 | . . . 4 ⊢ (𝑁 ∈ (ℤ≥‘𝑀) → (¬ 𝑁 = 𝑀 → 𝑀 ∈ ℤ)) |
| 3 | eluzelz 12775 | . . . . . 6 ⊢ (𝑁 ∈ (ℤ≥‘𝑀) → 𝑁 ∈ ℤ) | |
| 4 | peano2zm 12548 | . . . . . 6 ⊢ (𝑁 ∈ ℤ → (𝑁 − 1) ∈ ℤ) | |
| 5 | 3, 4 | syl 17 | . . . . 5 ⊢ (𝑁 ∈ (ℤ≥‘𝑀) → (𝑁 − 1) ∈ ℤ) |
| 6 | 5 | a1d 25 | . . . 4 ⊢ (𝑁 ∈ (ℤ≥‘𝑀) → (¬ 𝑁 = 𝑀 → (𝑁 − 1) ∈ ℤ)) |
| 7 | df-ne 2934 | . . . . . 6 ⊢ (𝑁 ≠ 𝑀 ↔ ¬ 𝑁 = 𝑀) | |
| 8 | eluzle 12778 | . . . . . . 7 ⊢ (𝑁 ∈ (ℤ≥‘𝑀) → 𝑀 ≤ 𝑁) | |
| 9 | 1 | zred 12610 | . . . . . . . . 9 ⊢ (𝑁 ∈ (ℤ≥‘𝑀) → 𝑀 ∈ ℝ) |
| 10 | eluzelre 12776 | . . . . . . . . 9 ⊢ (𝑁 ∈ (ℤ≥‘𝑀) → 𝑁 ∈ ℝ) | |
| 11 | 9, 10 | ltlend 11292 | . . . . . . . 8 ⊢ (𝑁 ∈ (ℤ≥‘𝑀) → (𝑀 < 𝑁 ↔ (𝑀 ≤ 𝑁 ∧ 𝑁 ≠ 𝑀))) |
| 12 | 11 | biimprd 248 | . . . . . . 7 ⊢ (𝑁 ∈ (ℤ≥‘𝑀) → ((𝑀 ≤ 𝑁 ∧ 𝑁 ≠ 𝑀) → 𝑀 < 𝑁)) |
| 13 | 8, 12 | mpand 696 | . . . . . 6 ⊢ (𝑁 ∈ (ℤ≥‘𝑀) → (𝑁 ≠ 𝑀 → 𝑀 < 𝑁)) |
| 14 | 7, 13 | biimtrrid 243 | . . . . 5 ⊢ (𝑁 ∈ (ℤ≥‘𝑀) → (¬ 𝑁 = 𝑀 → 𝑀 < 𝑁)) |
| 15 | zltlem1 12558 | . . . . . 6 ⊢ ((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) → (𝑀 < 𝑁 ↔ 𝑀 ≤ (𝑁 − 1))) | |
| 16 | 1, 3, 15 | syl2anc 585 | . . . . 5 ⊢ (𝑁 ∈ (ℤ≥‘𝑀) → (𝑀 < 𝑁 ↔ 𝑀 ≤ (𝑁 − 1))) |
| 17 | 14, 16 | sylibd 239 | . . . 4 ⊢ (𝑁 ∈ (ℤ≥‘𝑀) → (¬ 𝑁 = 𝑀 → 𝑀 ≤ (𝑁 − 1))) |
| 18 | 2, 6, 17 | 3jcad 1130 | . . 3 ⊢ (𝑁 ∈ (ℤ≥‘𝑀) → (¬ 𝑁 = 𝑀 → (𝑀 ∈ ℤ ∧ (𝑁 − 1) ∈ ℤ ∧ 𝑀 ≤ (𝑁 − 1)))) |
| 19 | eluz2 12771 | . . 3 ⊢ ((𝑁 − 1) ∈ (ℤ≥‘𝑀) ↔ (𝑀 ∈ ℤ ∧ (𝑁 − 1) ∈ ℤ ∧ 𝑀 ≤ (𝑁 − 1))) | |
| 20 | 18, 19 | imbitrrdi 252 | . 2 ⊢ (𝑁 ∈ (ℤ≥‘𝑀) → (¬ 𝑁 = 𝑀 → (𝑁 − 1) ∈ (ℤ≥‘𝑀))) |
| 21 | 20 | orrd 864 | 1 ⊢ (𝑁 ∈ (ℤ≥‘𝑀) → (𝑁 = 𝑀 ∨ (𝑁 − 1) ∈ (ℤ≥‘𝑀))) |
| Colors of variables: wff setvar class |
| Syntax hints: ¬ wn 3 → wi 4 ↔ wb 206 ∧ wa 395 ∨ wo 848 ∧ w3a 1087 = wceq 1542 ∈ wcel 2114 ≠ wne 2933 class class class wbr 5100 ‘cfv 6502 (class class class)co 7370 1c1 11041 < clt 11180 ≤ cle 11181 − cmin 11378 ℤcz 12502 ℤ≥cuz 12765 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-10 2147 ax-11 2163 ax-12 2185 ax-ext 2709 ax-sep 5245 ax-nul 5255 ax-pow 5314 ax-pr 5381 ax-un 7692 ax-cnex 11096 ax-resscn 11097 ax-1cn 11098 ax-icn 11099 ax-addcl 11100 ax-addrcl 11101 ax-mulcl 11102 ax-mulrcl 11103 ax-mulcom 11104 ax-addass 11105 ax-mulass 11106 ax-distr 11107 ax-i2m1 11108 ax-1ne0 11109 ax-1rid 11110 ax-rnegex 11111 ax-rrecex 11112 ax-cnre 11113 ax-pre-lttri 11114 ax-pre-lttrn 11115 ax-pre-ltadd 11116 ax-pre-mulgt0 11117 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3or 1088 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-nf 1786 df-sb 2069 df-mo 2540 df-eu 2570 df-clab 2716 df-cleq 2729 df-clel 2812 df-nfc 2886 df-ne 2934 df-nel 3038 df-ral 3053 df-rex 3063 df-reu 3353 df-rab 3402 df-v 3444 df-sbc 3743 df-csb 3852 df-dif 3906 df-un 3908 df-in 3910 df-ss 3920 df-pss 3923 df-nul 4288 df-if 4482 df-pw 4558 df-sn 4583 df-pr 4585 df-op 4589 df-uni 4866 df-iun 4950 df-br 5101 df-opab 5163 df-mpt 5182 df-tr 5208 df-id 5529 df-eprel 5534 df-po 5542 df-so 5543 df-fr 5587 df-we 5589 df-xp 5640 df-rel 5641 df-cnv 5642 df-co 5643 df-dm 5644 df-rn 5645 df-res 5646 df-ima 5647 df-pred 6269 df-ord 6330 df-on 6331 df-lim 6332 df-suc 6333 df-iota 6458 df-fun 6504 df-fn 6505 df-f 6506 df-f1 6507 df-fo 6508 df-f1o 6509 df-fv 6510 df-riota 7327 df-ov 7373 df-oprab 7374 df-mpo 7375 df-om 7821 df-2nd 7946 df-frecs 8235 df-wrecs 8266 df-recs 8315 df-rdg 8353 df-er 8647 df-en 8898 df-dom 8899 df-sdom 8900 df-pnf 11182 df-mnf 11183 df-xr 11184 df-ltxr 11185 df-le 11186 df-sub 11380 df-neg 11381 df-nn 12160 df-n0 12416 df-z 12503 df-uz 12766 |
| This theorem is referenced by: uzp1 12802 fzm1 13537 hashfzo 14366 iserex 15594 ntrivcvg 15834 ntrivcvgtail 15837 mulgfval 19016 |
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