Metamath Proof Explorer |
< Previous
Next >
Nearby theorems |
||
Mirrors > Home > MPE Home > Th. List > fzn0 | Structured version Visualization version GIF version |
Description: Properties of a finite interval of integers which is nonempty. (Contributed by Jeff Madsen, 17-Jun-2010.) (Revised by Mario Carneiro, 28-Apr-2015.) |
Ref | Expression |
---|---|
fzn0 | ⊢ ((𝑀...𝑁) ≠ ∅ ↔ 𝑁 ∈ (ℤ≥‘𝑀)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | n0 4313 | . . 3 ⊢ ((𝑀...𝑁) ≠ ∅ ↔ ∃𝑥 𝑥 ∈ (𝑀...𝑁)) | |
2 | elfzuz2 12915 | . . . 4 ⊢ (𝑥 ∈ (𝑀...𝑁) → 𝑁 ∈ (ℤ≥‘𝑀)) | |
3 | 2 | exlimiv 1930 | . . 3 ⊢ (∃𝑥 𝑥 ∈ (𝑀...𝑁) → 𝑁 ∈ (ℤ≥‘𝑀)) |
4 | 1, 3 | sylbi 219 | . 2 ⊢ ((𝑀...𝑁) ≠ ∅ → 𝑁 ∈ (ℤ≥‘𝑀)) |
5 | eluzfz1 12917 | . . 3 ⊢ (𝑁 ∈ (ℤ≥‘𝑀) → 𝑀 ∈ (𝑀...𝑁)) | |
6 | 5 | ne0d 4304 | . 2 ⊢ (𝑁 ∈ (ℤ≥‘𝑀) → (𝑀...𝑁) ≠ ∅) |
7 | 4, 6 | impbii 211 | 1 ⊢ ((𝑀...𝑁) ≠ ∅ ↔ 𝑁 ∈ (ℤ≥‘𝑀)) |
Colors of variables: wff setvar class |
Syntax hints: ↔ wb 208 ∃wex 1779 ∈ wcel 2113 ≠ wne 3019 ∅c0 4294 ‘cfv 6358 (class class class)co 7159 ℤ≥cuz 12246 ...cfz 12895 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1795 ax-4 1809 ax-5 1910 ax-6 1969 ax-7 2014 ax-8 2115 ax-9 2123 ax-10 2144 ax-11 2160 ax-12 2176 ax-ext 2796 ax-sep 5206 ax-nul 5213 ax-pow 5269 ax-pr 5333 ax-un 7464 ax-cnex 10596 ax-resscn 10597 ax-pre-lttri 10614 ax-pre-lttrn 10615 |
This theorem depends on definitions: df-bi 209 df-an 399 df-or 844 df-3or 1084 df-3an 1085 df-tru 1539 df-ex 1780 df-nf 1784 df-sb 2069 df-mo 2621 df-eu 2653 df-clab 2803 df-cleq 2817 df-clel 2896 df-nfc 2966 df-ne 3020 df-nel 3127 df-ral 3146 df-rex 3147 df-rab 3150 df-v 3499 df-sbc 3776 df-csb 3887 df-dif 3942 df-un 3944 df-in 3946 df-ss 3955 df-nul 4295 df-if 4471 df-pw 4544 df-sn 4571 df-pr 4573 df-op 4577 df-uni 4842 df-iun 4924 df-br 5070 df-opab 5132 df-mpt 5150 df-id 5463 df-xp 5564 df-rel 5565 df-cnv 5566 df-co 5567 df-dm 5568 df-rn 5569 df-res 5570 df-ima 5571 df-iota 6317 df-fun 6360 df-fn 6361 df-f 6362 df-f1 6363 df-fo 6364 df-f1o 6365 df-fv 6366 df-ov 7162 df-oprab 7163 df-mpo 7164 df-1st 7692 df-2nd 7693 df-er 8292 df-en 8513 df-dom 8514 df-sdom 8515 df-pnf 10680 df-mnf 10681 df-xr 10682 df-ltxr 10683 df-le 10684 df-neg 10876 df-z 11985 df-uz 12247 df-fz 12896 |
This theorem is referenced by: fzn 12926 fzfi 13343 fseqsupcl 13348 ffz0iswrd 13894 fsumrev2 15140 gsumval3 19030 pmatcollpw3fi 21396 iscmet3 23899 dchrisum0flblem1 26087 pntrsumbnd2 26146 wlkn0 27405 fzdifsuc2 41583 stoweidlem26 42318 |
Copyright terms: Public domain | W3C validator |