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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 6530 | . . 3 ⊢ (𝐹:(𝑀...𝑁)⟶ℝ → ran 𝐹 ⊆ ℝ) | |
2 | 1 | adantl 485 | . 2 ⊢ ((𝑁 ∈ (ℤ≥‘𝑀) ∧ 𝐹:(𝑀...𝑁)⟶ℝ) → ran 𝐹 ⊆ ℝ) |
3 | fzfi 13510 | . . . 4 ⊢ (𝑀...𝑁) ∈ Fin | |
4 | ffn 6523 | . . . . . 6 ⊢ (𝐹:(𝑀...𝑁)⟶ℝ → 𝐹 Fn (𝑀...𝑁)) | |
5 | 4 | adantl 485 | . . . . 5 ⊢ ((𝑁 ∈ (ℤ≥‘𝑀) ∧ 𝐹:(𝑀...𝑁)⟶ℝ) → 𝐹 Fn (𝑀...𝑁)) |
6 | dffn4 6617 | . . . . 5 ⊢ (𝐹 Fn (𝑀...𝑁) ↔ 𝐹:(𝑀...𝑁)–onto→ran 𝐹) | |
7 | 5, 6 | sylib 221 | . . . 4 ⊢ ((𝑁 ∈ (ℤ≥‘𝑀) ∧ 𝐹:(𝑀...𝑁)⟶ℝ) → 𝐹:(𝑀...𝑁)–onto→ran 𝐹) |
8 | fofi 8940 | . . . 4 ⊢ (((𝑀...𝑁) ∈ Fin ∧ 𝐹:(𝑀...𝑁)–onto→ran 𝐹) → ran 𝐹 ∈ Fin) | |
9 | 3, 7, 8 | sylancr 590 | . . 3 ⊢ ((𝑁 ∈ (ℤ≥‘𝑀) ∧ 𝐹:(𝑀...𝑁)⟶ℝ) → ran 𝐹 ∈ Fin) |
10 | fdm 6532 | . . . . . 6 ⊢ (𝐹:(𝑀...𝑁)⟶ℝ → dom 𝐹 = (𝑀...𝑁)) | |
11 | 10 | adantl 485 | . . . . 5 ⊢ ((𝑁 ∈ (ℤ≥‘𝑀) ∧ 𝐹:(𝑀...𝑁)⟶ℝ) → dom 𝐹 = (𝑀...𝑁)) |
12 | simpl 486 | . . . . . 6 ⊢ ((𝑁 ∈ (ℤ≥‘𝑀) ∧ 𝐹:(𝑀...𝑁)⟶ℝ) → 𝑁 ∈ (ℤ≥‘𝑀)) | |
13 | fzn0 13091 | . . . . . 6 ⊢ ((𝑀...𝑁) ≠ ∅ ↔ 𝑁 ∈ (ℤ≥‘𝑀)) | |
14 | 12, 13 | sylibr 237 | . . . . 5 ⊢ ((𝑁 ∈ (ℤ≥‘𝑀) ∧ 𝐹:(𝑀...𝑁)⟶ℝ) → (𝑀...𝑁) ≠ ∅) |
15 | 11, 14 | eqnetrd 2999 | . . . 4 ⊢ ((𝑁 ∈ (ℤ≥‘𝑀) ∧ 𝐹:(𝑀...𝑁)⟶ℝ) → dom 𝐹 ≠ ∅) |
16 | dm0rn0 5779 | . . . . 5 ⊢ (dom 𝐹 = ∅ ↔ ran 𝐹 = ∅) | |
17 | 16 | necon3bii 2984 | . . . 4 ⊢ (dom 𝐹 ≠ ∅ ↔ ran 𝐹 ≠ ∅) |
18 | 15, 17 | sylib 221 | . . 3 ⊢ ((𝑁 ∈ (ℤ≥‘𝑀) ∧ 𝐹:(𝑀...𝑁)⟶ℝ) → ran 𝐹 ≠ ∅) |
19 | ltso 10878 | . . . 4 ⊢ < Or ℝ | |
20 | fisupcl 9063 | . . . 4 ⊢ (( < Or ℝ ∧ (ran 𝐹 ∈ Fin ∧ ran 𝐹 ≠ ∅ ∧ ran 𝐹 ⊆ ℝ)) → sup(ran 𝐹, ℝ, < ) ∈ ran 𝐹) | |
21 | 19, 20 | mpan 690 | . . 3 ⊢ ((ran 𝐹 ∈ Fin ∧ ran 𝐹 ≠ ∅ ∧ ran 𝐹 ⊆ ℝ) → sup(ran 𝐹, ℝ, < ) ∈ ran 𝐹) |
22 | 9, 18, 2, 21 | syl3anc 1373 | . 2 ⊢ ((𝑁 ∈ (ℤ≥‘𝑀) ∧ 𝐹:(𝑀...𝑁)⟶ℝ) → sup(ran 𝐹, ℝ, < ) ∈ ran 𝐹) |
23 | 2, 22 | sseldd 3888 | 1 ⊢ ((𝑁 ∈ (ℤ≥‘𝑀) ∧ 𝐹:(𝑀...𝑁)⟶ℝ) → sup(ran 𝐹, ℝ, < ) ∈ ℝ) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 399 ∧ w3a 1089 = wceq 1543 ∈ wcel 2112 ≠ wne 2932 ⊆ wss 3853 ∅c0 4223 Or wor 5452 dom cdm 5536 ran crn 5537 Fn wfn 6353 ⟶wf 6354 –onto→wfo 6356 ‘cfv 6358 (class class class)co 7191 Fincfn 8604 supcsup 9034 ℝcr 10693 < clt 10832 ℤ≥cuz 12403 ...cfz 13060 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1803 ax-4 1817 ax-5 1918 ax-6 1976 ax-7 2018 ax-8 2114 ax-9 2122 ax-10 2143 ax-11 2160 ax-12 2177 ax-ext 2708 ax-sep 5177 ax-nul 5184 ax-pow 5243 ax-pr 5307 ax-un 7501 ax-cnex 10750 ax-resscn 10751 ax-1cn 10752 ax-icn 10753 ax-addcl 10754 ax-addrcl 10755 ax-mulcl 10756 ax-mulrcl 10757 ax-mulcom 10758 ax-addass 10759 ax-mulass 10760 ax-distr 10761 ax-i2m1 10762 ax-1ne0 10763 ax-1rid 10764 ax-rnegex 10765 ax-rrecex 10766 ax-cnre 10767 ax-pre-lttri 10768 ax-pre-lttrn 10769 ax-pre-ltadd 10770 ax-pre-mulgt0 10771 |
This theorem depends on definitions: df-bi 210 df-an 400 df-or 848 df-3or 1090 df-3an 1091 df-tru 1546 df-fal 1556 df-ex 1788 df-nf 1792 df-sb 2073 df-mo 2539 df-eu 2568 df-clab 2715 df-cleq 2728 df-clel 2809 df-nfc 2879 df-ne 2933 df-nel 3037 df-ral 3056 df-rex 3057 df-reu 3058 df-rmo 3059 df-rab 3060 df-v 3400 df-sbc 3684 df-csb 3799 df-dif 3856 df-un 3858 df-in 3860 df-ss 3870 df-pss 3872 df-nul 4224 df-if 4426 df-pw 4501 df-sn 4528 df-pr 4530 df-tp 4532 df-op 4534 df-uni 4806 df-iun 4892 df-br 5040 df-opab 5102 df-mpt 5121 df-tr 5147 df-id 5440 df-eprel 5445 df-po 5453 df-so 5454 df-fr 5494 df-we 5496 df-xp 5542 df-rel 5543 df-cnv 5544 df-co 5545 df-dm 5546 df-rn 5547 df-res 5548 df-ima 5549 df-pred 6140 df-ord 6194 df-on 6195 df-lim 6196 df-suc 6197 df-iota 6316 df-fun 6360 df-fn 6361 df-f 6362 df-f1 6363 df-fo 6364 df-f1o 6365 df-fv 6366 df-riota 7148 df-ov 7194 df-oprab 7195 df-mpo 7196 df-om 7623 df-1st 7739 df-2nd 7740 df-wrecs 8025 df-recs 8086 df-rdg 8124 df-1o 8180 df-er 8369 df-en 8605 df-dom 8606 df-sdom 8607 df-fin 8608 df-sup 9036 df-pnf 10834 df-mnf 10835 df-xr 10836 df-ltxr 10837 df-le 10838 df-sub 11029 df-neg 11030 df-nn 11796 df-n0 12056 df-z 12142 df-uz 12404 df-fz 13061 |
This theorem is referenced by: (None) |
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