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Mirrors > Home > MPE Home > Th. List > fseqsupcl | Structured version Visualization version GIF version |
Description: The values of a finite real sequence have a supremum. (Contributed by NM, 20-Sep-2005.) (Revised by Mario Carneiro, 28-Apr-2015.) |
Ref | Expression |
---|---|
fseqsupcl | ⊢ ((𝑁 ∈ (ℤ≥‘𝑀) ∧ 𝐹:(𝑀...𝑁)⟶ℝ) → sup(ran 𝐹, ℝ, < ) ∈ ℝ) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | frn 6091 | . . 3 ⊢ (𝐹:(𝑀...𝑁)⟶ℝ → ran 𝐹 ⊆ ℝ) | |
2 | 1 | adantl 481 | . 2 ⊢ ((𝑁 ∈ (ℤ≥‘𝑀) ∧ 𝐹:(𝑀...𝑁)⟶ℝ) → ran 𝐹 ⊆ ℝ) |
3 | fzfi 12811 | . . . 4 ⊢ (𝑀...𝑁) ∈ Fin | |
4 | ffn 6083 | . . . . . 6 ⊢ (𝐹:(𝑀...𝑁)⟶ℝ → 𝐹 Fn (𝑀...𝑁)) | |
5 | 4 | adantl 481 | . . . . 5 ⊢ ((𝑁 ∈ (ℤ≥‘𝑀) ∧ 𝐹:(𝑀...𝑁)⟶ℝ) → 𝐹 Fn (𝑀...𝑁)) |
6 | dffn4 6159 | . . . . 5 ⊢ (𝐹 Fn (𝑀...𝑁) ↔ 𝐹:(𝑀...𝑁)–onto→ran 𝐹) | |
7 | 5, 6 | sylib 208 | . . . 4 ⊢ ((𝑁 ∈ (ℤ≥‘𝑀) ∧ 𝐹:(𝑀...𝑁)⟶ℝ) → 𝐹:(𝑀...𝑁)–onto→ran 𝐹) |
8 | fofi 8293 | . . . 4 ⊢ (((𝑀...𝑁) ∈ Fin ∧ 𝐹:(𝑀...𝑁)–onto→ran 𝐹) → ran 𝐹 ∈ Fin) | |
9 | 3, 7, 8 | sylancr 696 | . . 3 ⊢ ((𝑁 ∈ (ℤ≥‘𝑀) ∧ 𝐹:(𝑀...𝑁)⟶ℝ) → ran 𝐹 ∈ Fin) |
10 | fdm 6089 | . . . . . 6 ⊢ (𝐹:(𝑀...𝑁)⟶ℝ → dom 𝐹 = (𝑀...𝑁)) | |
11 | 10 | adantl 481 | . . . . 5 ⊢ ((𝑁 ∈ (ℤ≥‘𝑀) ∧ 𝐹:(𝑀...𝑁)⟶ℝ) → dom 𝐹 = (𝑀...𝑁)) |
12 | simpl 472 | . . . . . 6 ⊢ ((𝑁 ∈ (ℤ≥‘𝑀) ∧ 𝐹:(𝑀...𝑁)⟶ℝ) → 𝑁 ∈ (ℤ≥‘𝑀)) | |
13 | fzn0 12393 | . . . . . 6 ⊢ ((𝑀...𝑁) ≠ ∅ ↔ 𝑁 ∈ (ℤ≥‘𝑀)) | |
14 | 12, 13 | sylibr 224 | . . . . 5 ⊢ ((𝑁 ∈ (ℤ≥‘𝑀) ∧ 𝐹:(𝑀...𝑁)⟶ℝ) → (𝑀...𝑁) ≠ ∅) |
15 | 11, 14 | eqnetrd 2890 | . . . 4 ⊢ ((𝑁 ∈ (ℤ≥‘𝑀) ∧ 𝐹:(𝑀...𝑁)⟶ℝ) → dom 𝐹 ≠ ∅) |
16 | dm0rn0 5374 | . . . . 5 ⊢ (dom 𝐹 = ∅ ↔ ran 𝐹 = ∅) | |
17 | 16 | necon3bii 2875 | . . . 4 ⊢ (dom 𝐹 ≠ ∅ ↔ ran 𝐹 ≠ ∅) |
18 | 15, 17 | sylib 208 | . . 3 ⊢ ((𝑁 ∈ (ℤ≥‘𝑀) ∧ 𝐹:(𝑀...𝑁)⟶ℝ) → ran 𝐹 ≠ ∅) |
19 | ltso 10156 | . . . 4 ⊢ < Or ℝ | |
20 | fisupcl 8416 | . . . 4 ⊢ (( < Or ℝ ∧ (ran 𝐹 ∈ Fin ∧ ran 𝐹 ≠ ∅ ∧ ran 𝐹 ⊆ ℝ)) → sup(ran 𝐹, ℝ, < ) ∈ ran 𝐹) | |
21 | 19, 20 | mpan 706 | . . 3 ⊢ ((ran 𝐹 ∈ Fin ∧ ran 𝐹 ≠ ∅ ∧ ran 𝐹 ⊆ ℝ) → sup(ran 𝐹, ℝ, < ) ∈ ran 𝐹) |
22 | 9, 18, 2, 21 | syl3anc 1366 | . 2 ⊢ ((𝑁 ∈ (ℤ≥‘𝑀) ∧ 𝐹:(𝑀...𝑁)⟶ℝ) → sup(ran 𝐹, ℝ, < ) ∈ ran 𝐹) |
23 | 2, 22 | sseldd 3637 | 1 ⊢ ((𝑁 ∈ (ℤ≥‘𝑀) ∧ 𝐹:(𝑀...𝑁)⟶ℝ) → sup(ran 𝐹, ℝ, < ) ∈ ℝ) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 383 ∧ w3a 1054 = wceq 1523 ∈ wcel 2030 ≠ wne 2823 ⊆ wss 3607 ∅c0 3948 Or wor 5063 dom cdm 5143 ran crn 5144 Fn wfn 5921 ⟶wf 5922 –onto→wfo 5924 ‘cfv 5926 (class class class)co 6690 Fincfn 7997 supcsup 8387 ℝcr 9973 < clt 10112 ℤ≥cuz 11725 ...cfz 12364 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1762 ax-4 1777 ax-5 1879 ax-6 1945 ax-7 1981 ax-8 2032 ax-9 2039 ax-10 2059 ax-11 2074 ax-12 2087 ax-13 2282 ax-ext 2631 ax-sep 4814 ax-nul 4822 ax-pow 4873 ax-pr 4936 ax-un 6991 ax-cnex 10030 ax-resscn 10031 ax-1cn 10032 ax-icn 10033 ax-addcl 10034 ax-addrcl 10035 ax-mulcl 10036 ax-mulrcl 10037 ax-mulcom 10038 ax-addass 10039 ax-mulass 10040 ax-distr 10041 ax-i2m1 10042 ax-1ne0 10043 ax-1rid 10044 ax-rnegex 10045 ax-rrecex 10046 ax-cnre 10047 ax-pre-lttri 10048 ax-pre-lttrn 10049 ax-pre-ltadd 10050 ax-pre-mulgt0 10051 |
This theorem depends on definitions: df-bi 197 df-or 384 df-an 385 df-3or 1055 df-3an 1056 df-tru 1526 df-ex 1745 df-nf 1750 df-sb 1938 df-eu 2502 df-mo 2503 df-clab 2638 df-cleq 2644 df-clel 2647 df-nfc 2782 df-ne 2824 df-nel 2927 df-ral 2946 df-rex 2947 df-reu 2948 df-rmo 2949 df-rab 2950 df-v 3233 df-sbc 3469 df-csb 3567 df-dif 3610 df-un 3612 df-in 3614 df-ss 3621 df-pss 3623 df-nul 3949 df-if 4120 df-pw 4193 df-sn 4211 df-pr 4213 df-tp 4215 df-op 4217 df-uni 4469 df-iun 4554 df-br 4686 df-opab 4746 df-mpt 4763 df-tr 4786 df-id 5053 df-eprel 5058 df-po 5064 df-so 5065 df-fr 5102 df-we 5104 df-xp 5149 df-rel 5150 df-cnv 5151 df-co 5152 df-dm 5153 df-rn 5154 df-res 5155 df-ima 5156 df-pred 5718 df-ord 5764 df-on 5765 df-lim 5766 df-suc 5767 df-iota 5889 df-fun 5928 df-fn 5929 df-f 5930 df-f1 5931 df-fo 5932 df-f1o 5933 df-fv 5934 df-riota 6651 df-ov 6693 df-oprab 6694 df-mpt2 6695 df-om 7108 df-1st 7210 df-2nd 7211 df-wrecs 7452 df-recs 7513 df-rdg 7551 df-1o 7605 df-er 7787 df-en 7998 df-dom 7999 df-sdom 8000 df-fin 8001 df-sup 8389 df-pnf 10114 df-mnf 10115 df-xr 10116 df-ltxr 10117 df-le 10118 df-sub 10306 df-neg 10307 df-nn 11059 df-n0 11331 df-z 11416 df-uz 11726 df-fz 12365 |
This theorem is referenced by: (None) |
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