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| Mirrors > Home > MPE Home > Th. List > uzdisj | Structured version Visualization version GIF version | ||
| Description: The first 𝑁 elements of an upper integer set are distinct from any later members. (Contributed by Mario Carneiro, 24-Apr-2014.) |
| Ref | Expression |
|---|---|
| uzdisj | ⊢ ((𝑀...(𝑁 − 1)) ∩ (ℤ≥‘𝑁)) = ∅ |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | elinel2 4102 | . . . . . 6 ⊢ (𝑘 ∈ ((𝑀...(𝑁 − 1)) ∩ (ℤ≥‘𝑁)) → 𝑘 ∈ (ℤ≥‘𝑁)) | |
| 2 | eluzle 13002 | . . . . . 6 ⊢ (𝑘 ∈ (ℤ≥‘𝑁) → 𝑁 ≤ 𝑘) | |
| 3 | 1, 2 | syl 18 | . . . . 5 ⊢ (𝑘 ∈ ((𝑀...(𝑁 − 1)) ∩ (ℤ≥‘𝑁)) → 𝑁 ≤ 𝑘) |
| 4 | eluzel2 12994 | . . . . . . 7 ⊢ (𝑘 ∈ (ℤ≥‘𝑁) → 𝑁 ∈ ℤ) | |
| 5 | 1, 4 | syl 18 | . . . . . 6 ⊢ (𝑘 ∈ ((𝑀...(𝑁 − 1)) ∩ (ℤ≥‘𝑁)) → 𝑁 ∈ ℤ) |
| 6 | eluzelz 12999 | . . . . . . 7 ⊢ (𝑘 ∈ (ℤ≥‘𝑁) → 𝑘 ∈ ℤ) | |
| 7 | 1, 6 | syl 18 | . . . . . 6 ⊢ (𝑘 ∈ ((𝑀...(𝑁 − 1)) ∩ (ℤ≥‘𝑁)) → 𝑘 ∈ ℤ) |
| 8 | zlem1lt 12772 | . . . . . 6 ⊢ ((𝑁 ∈ ℤ ∧ 𝑘 ∈ ℤ) → (𝑁 ≤ 𝑘 ↔ (𝑁 − 1) < 𝑘)) | |
| 9 | 5, 7, 8 | syl2anc 596 | . . . . 5 ⊢ (𝑘 ∈ ((𝑀...(𝑁 − 1)) ∩ (ℤ≥‘𝑁)) → (𝑁 ≤ 𝑘 ↔ (𝑁 − 1) < 𝑘)) |
| 10 | 3, 9 | mpbid 235 | . . . 4 ⊢ (𝑘 ∈ ((𝑀...(𝑁 − 1)) ∩ (ℤ≥‘𝑁)) → (𝑁 − 1) < 𝑘) |
| 11 | 7 | zred 12827 | . . . . 5 ⊢ (𝑘 ∈ ((𝑀...(𝑁 − 1)) ∩ (ℤ≥‘𝑁)) → 𝑘 ∈ ℝ) |
| 12 | peano2zm 12763 | . . . . . . 7 ⊢ (𝑁 ∈ ℤ → (𝑁 − 1) ∈ ℤ) | |
| 13 | 5, 12 | syl 18 | . . . . . 6 ⊢ (𝑘 ∈ ((𝑀...(𝑁 − 1)) ∩ (ℤ≥‘𝑁)) → (𝑁 − 1) ∈ ℤ) |
| 14 | 13 | zred 12827 | . . . . 5 ⊢ (𝑘 ∈ ((𝑀...(𝑁 − 1)) ∩ (ℤ≥‘𝑁)) → (𝑁 − 1) ∈ ℝ) |
| 15 | elinel1 4101 | . . . . . 6 ⊢ (𝑘 ∈ ((𝑀...(𝑁 − 1)) ∩ (ℤ≥‘𝑁)) → 𝑘 ∈ (𝑀...(𝑁 − 1))) | |
| 16 | elfzle2 13685 | . . . . . 6 ⊢ (𝑘 ∈ (𝑀...(𝑁 − 1)) → 𝑘 ≤ (𝑁 − 1)) | |
| 17 | 15, 16 | syl 18 | . . . . 5 ⊢ (𝑘 ∈ ((𝑀...(𝑁 − 1)) ∩ (ℤ≥‘𝑁)) → 𝑘 ≤ (𝑁 − 1)) |
| 18 | 11, 14, 17 | lensymd 11485 | . . . 4 ⊢ (𝑘 ∈ ((𝑀...(𝑁 − 1)) ∩ (ℤ≥‘𝑁)) → ¬ (𝑁 − 1) < 𝑘) |
| 19 | 10, 18 | pm2.21dd 198 | . . 3 ⊢ (𝑘 ∈ ((𝑀...(𝑁 − 1)) ∩ (ℤ≥‘𝑁)) → 𝑘 ∈ ∅) |
| 20 | 19 | ssriv 3917 | . 2 ⊢ ((𝑀...(𝑁 − 1)) ∩ (ℤ≥‘𝑁)) ⊆ ∅ |
| 21 | ss0 4355 | . 2 ⊢ (((𝑀...(𝑁 − 1)) ∩ (ℤ≥‘𝑁)) ⊆ ∅ → ((𝑀...(𝑁 − 1)) ∩ (ℤ≥‘𝑁)) = ∅) | |
| 22 | 20, 21 | ax-mp 5 | 1 ⊢ ((𝑀...(𝑁 − 1)) ∩ (ℤ≥‘𝑁)) = ∅ |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ↔ wb 209 = wceq 1570 ∈ wcel 2147 ⊆ wss 3900 ∩ cin 4092 ∅c0 4281 class class class wbr 5106 ‘cfv 6555 (class class class)co 7440 1c1 11225 < clt 11367 ≤ cle 11368 − cmin 11565 ℤcz 12717 ℤ≥cuz 12989 ...cfz 13663 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1945 ax-6 2002 ax-7 2043 ax-8 2149 ax-9 2157 ax-10 2180 ax-11 2197 ax-12 2216 ax-ext 2735 ax-sep 5252 ax-nul 5263 ax-pow 5331 ax-pr 5395 ax-un 7772 ax-cnex 11280 ax-resscn 11281 ax-1cn 11282 ax-icn 11283 ax-addcl 11284 ax-addrcl 11285 ax-mulcl 11286 ax-mulrcl 11287 ax-mulcom 11288 ax-addass 11289 ax-mulass 11290 ax-distr 11291 ax-i2m1 11292 ax-1ne0 11293 ax-1rid 11294 ax-rnegex 11295 ax-rrecex 11296 ax-cnre 11297 ax-pre-lttri 11298 ax-pre-lttrn 11299 ax-pre-ltadd 11300 ax-pre-mulgt0 11301 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2102 df-mo 2567 df-eu 2597 df-clab 2742 df-cleq 2755 df-clel 2839 df-nfc 2913 df-ne 2960 df-nel 3066 df-ral 3081 df-rex 3091 df-reu 3370 df-rab 3417 df-v 3456 df-sbc 3743 df-csb 3852 df-ss 3901 df-pss 4017 df-dif 4050 df-in 4094 df-un 4154 df-nul 4282 df-if 4486 df-pw 4562 df-sn 4589 df-pr 4591 df-op 4839 df-uni 4871 df-iun 4956 df-br 5107 df-opab 5171 df-mpt 5190 df-tr 5216 df-id 5550 df-eprel 5555 df-po 5563 df-so 5564 df-fr 5608 df-we 5610 df-xp 5661 df-rel 5662 df-cnv 5663 df-co 5664 df-dm 5665 df-rn 5666 df-res 5667 df-ima 5668 df-pred 6319 df-ord 6380 df-on 6381 df-lim 6382 df-suc 6383 df-iota 6509 df-fun 6557 df-fn 6558 df-f 6559 df-f1 6560 df-fo 6561 df-f1o 6562 df-fv 6563 df-riota 7397 df-ov 7443 df-oprab 7444 df-mpo 7445 df-om 7899 df-1st 8022 df-2nd 8023 df-frecs 8324 df-wrecs 8355 df-recs 8404 df-rdg 8443 df-er 8742 df-en 8999 df-dom 9000 df-sdom 9001 df-pnf 11369 df-mnf 11370 df-xr 11371 df-ltxr 11372 df-le 11373 df-sub 11567 df-neg 11568 df-nn 12360 df-n0 12631 df-z 12718 df-uz 12990 df-fz 13664 |
| This theorem is used by: 2prm 16893 uniioombllem4 25934 aacllem 51217 |
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