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| Mirrors > Home > MPE Home > Th. List > elfzel1 | Structured version Visualization version GIF version | ||
| Description: Membership in a finite set of sequential integer implies the lower bound is an integer. (Contributed by NM, 6-Sep-2005.) (Revised by Mario Carneiro, 28-Apr-2015.) |
| Ref | Expression |
|---|---|
| elfzel1 | ⊢ (𝐾 ∈ (𝑀...𝑁) → 𝑀 ∈ ℤ) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | elfzuz 13665 | . 2 ⊢ (𝐾 ∈ (𝑀...𝑁) → 𝐾 ∈ (ℤ≥‘𝑀)) | |
| 2 | eluzel2 12983 | . 2 ⊢ (𝐾 ∈ (ℤ≥‘𝑀) → 𝑀 ∈ ℤ) | |
| 3 | 1, 2 | syl 18 | 1 ⊢ (𝐾 ∈ (𝑀...𝑁) → 𝑀 ∈ ℤ) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ∈ wcel 2146 ‘cfv 6547 (class class class)co 7430 ℤcz 12706 ℤ≥cuz 12978 ...cfz 13652 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1827 ax-4 1841 ax-5 1944 ax-6 2001 ax-7 2042 ax-8 2148 ax-9 2156 ax-10 2179 ax-11 2196 ax-12 2215 ax-ext 2735 ax-sep 5252 ax-nul 5263 ax-pr 5395 ax-un 7761 ax-cnex 11269 ax-resscn 11270 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1572 df-fal 1582 df-ex 1812 df-nf 1816 df-sb 2101 df-mo 2567 df-eu 2597 df-clab 2742 df-cleq 2755 df-clel 2839 df-nfc 2913 df-ne 2960 df-ral 3081 df-rex 3091 df-rab 3417 df-v 3456 df-sbc 3743 df-csb 3852 df-ss 3901 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-id 5550 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-iota 6501 df-fun 6549 df-fn 6550 df-f 6551 df-fv 6555 df-ov 7433 df-oprab 7434 df-mpo 7435 df-1st 8011 df-2nd 8012 df-neg 11557 df-z 12707 df-uz 12979 df-fz 13653 |
| This theorem is used by: fzdisj 13698 fzrev2i 13736 fzrev3 13737 uznfz 13757 elfzmlbm 13785 bcp1nk 14474 fallfacval3 16194 fzm1ne1 33436 fzmaxdif 44131 jm2.23 44146 monoords 46455 iblspltprt 47125 itgspltprt 47131 stoweidlem34 47186 iundjiun 47612 iccpartgt 48651 altgsumbcALT 49607 |
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