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| 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 4303 | . . 3 ⊢ ((𝑀...𝑁) ≠ ∅ ↔ ∃𝑥 𝑥 ∈ (𝑀...𝑁)) | |
| 2 | elfzuz2 13528 | . . . 4 ⊢ (𝑥 ∈ (𝑀...𝑁) → 𝑁 ∈ (ℤ≥‘𝑀)) | |
| 3 | 2 | exlimiv 1949 | . . 3 ⊢ (∃𝑥 𝑥 ∈ (𝑀...𝑁) → 𝑁 ∈ (ℤ≥‘𝑀)) |
| 4 | 1, 3 | sylbi 219 | . 2 ⊢ ((𝑀...𝑁) ≠ ∅ → 𝑁 ∈ (ℤ≥‘𝑀)) |
| 5 | eluzfz1 13530 | . . 3 ⊢ (𝑁 ∈ (ℤ≥‘𝑀) → 𝑀 ∈ (𝑀...𝑁)) | |
| 6 | 5 | ne0d 4292 | . 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 1798 ∈ wcel 2141 ≠ wne 2956 ∅c0 4283 ‘cfv 6516 (class class class)co 7391 ℤ≥cuz 12833 ...cfz 13506 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1814 ax-4 1828 ax-5 1929 ax-6 1986 ax-7 2027 ax-8 2143 ax-9 2151 ax-10 2174 ax-11 2190 ax-12 2211 ax-ext 2733 ax-sep 5243 ax-nul 5253 ax-pow 5319 ax-pr 5387 ax-un 7713 ax-cnex 11123 ax-resscn 11124 ax-pre-lttri 11141 ax-pre-lttrn 11142 |
| This theorem depends on definitions: df-bi 209 df-an 400 df-or 859 df-3or 1098 df-3an 1099 df-tru 1562 df-fal 1572 df-ex 1799 df-nf 1803 df-sb 2090 df-mo 2565 df-eu 2595 df-clab 2740 df-cleq 2753 df-clel 2836 df-nfc 2910 df-ne 2957 df-nel 3061 df-ral 3076 df-rex 3086 df-rab 3414 df-v 3455 df-sbc 3743 df-csb 3851 df-dif 3905 df-un 3907 df-in 3909 df-ss 3919 df-nul 4284 df-if 4478 df-pw 4554 df-sn 4580 df-pr 4582 df-op 4586 df-uni 4863 df-iun 4948 df-br 5098 df-opab 5160 df-mpt 5179 df-id 5538 df-xp 5649 df-rel 5650 df-cnv 5651 df-co 5652 df-dm 5653 df-rn 5654 df-res 5655 df-ima 5656 df-iota 6472 df-fun 6518 df-fn 6519 df-f 6520 df-f1 6521 df-fo 6522 df-f1o 6523 df-fv 6524 df-ov 7394 df-oprab 7395 df-mpo 7396 df-1st 7965 df-2nd 7966 df-er 8672 df-en 8922 df-dom 8923 df-sdom 8924 df-pnf 11212 df-mnf 11213 df-xr 11214 df-ltxr 11215 df-le 11216 df-neg 11411 df-z 12563 df-uz 12834 df-fz 13507 |
| This theorem is referenced by: fzn 13539 fzfi 13979 fseqsupcl 13984 ffz0iswrd 14548 fsumrev2 15800 gsumval3 19938 pmatcollpw3fi 22833 iscmet3 25343 dchrisum0flblem1 27560 pntrsumbnd2 27619 wlkn0 29778 gsumwrd2dccat 33219 aks6d1c2lem4 42705 aks6d1c2 42708 aks6d1c6lem3 42750 fzdifsuc2 45850 stoweidlem26 46561 |
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