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Mirrors > Home > MPE Home > Th. List > hausflf2 | Structured version Visualization version GIF version |
Description: If a convergent function has its values in a Hausdorff space, then it has a unique limit. (Contributed by FL, 14-Nov-2010.) (Revised by Stefan O'Rear, 6-Aug-2015.) |
Ref | Expression |
---|---|
hausflf.x | ⊢ 𝑋 = ∪ 𝐽 |
Ref | Expression |
---|---|
hausflf2 | ⊢ (((𝐽 ∈ Haus ∧ 𝐿 ∈ (Fil‘𝑌) ∧ 𝐹:𝑌⟶𝑋) ∧ ((𝐽 fLimf 𝐿)‘𝐹) ≠ ∅) → ((𝐽 fLimf 𝐿)‘𝐹) ≈ 1o) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | n0 4260 | . . 3 ⊢ (((𝐽 fLimf 𝐿)‘𝐹) ≠ ∅ ↔ ∃𝑥 𝑥 ∈ ((𝐽 fLimf 𝐿)‘𝐹)) | |
2 | 1 | biimpi 219 | . 2 ⊢ (((𝐽 fLimf 𝐿)‘𝐹) ≠ ∅ → ∃𝑥 𝑥 ∈ ((𝐽 fLimf 𝐿)‘𝐹)) |
3 | hausflf.x | . . 3 ⊢ 𝑋 = ∪ 𝐽 | |
4 | 3 | hausflf 22602 | . 2 ⊢ ((𝐽 ∈ Haus ∧ 𝐿 ∈ (Fil‘𝑌) ∧ 𝐹:𝑌⟶𝑋) → ∃*𝑥 𝑥 ∈ ((𝐽 fLimf 𝐿)‘𝐹)) |
5 | euen1b 8563 | . . 3 ⊢ (((𝐽 fLimf 𝐿)‘𝐹) ≈ 1o ↔ ∃!𝑥 𝑥 ∈ ((𝐽 fLimf 𝐿)‘𝐹)) | |
6 | df-eu 2629 | . . 3 ⊢ (∃!𝑥 𝑥 ∈ ((𝐽 fLimf 𝐿)‘𝐹) ↔ (∃𝑥 𝑥 ∈ ((𝐽 fLimf 𝐿)‘𝐹) ∧ ∃*𝑥 𝑥 ∈ ((𝐽 fLimf 𝐿)‘𝐹))) | |
7 | 5, 6 | sylbbr 239 | . 2 ⊢ ((∃𝑥 𝑥 ∈ ((𝐽 fLimf 𝐿)‘𝐹) ∧ ∃*𝑥 𝑥 ∈ ((𝐽 fLimf 𝐿)‘𝐹)) → ((𝐽 fLimf 𝐿)‘𝐹) ≈ 1o) |
8 | 2, 4, 7 | syl2anr 599 | 1 ⊢ (((𝐽 ∈ Haus ∧ 𝐿 ∈ (Fil‘𝑌) ∧ 𝐹:𝑌⟶𝑋) ∧ ((𝐽 fLimf 𝐿)‘𝐹) ≠ ∅) → ((𝐽 fLimf 𝐿)‘𝐹) ≈ 1o) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 399 ∧ w3a 1084 = wceq 1538 ∃wex 1781 ∈ wcel 2111 ∃*wmo 2596 ∃!weu 2628 ≠ wne 2987 ∅c0 4243 ∪ cuni 4800 class class class wbr 5030 ⟶wf 6320 ‘cfv 6324 (class class class)co 7135 1oc1o 8078 ≈ cen 8489 Hauscha 21913 Filcfil 22450 fLimf cflf 22540 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1911 ax-6 1970 ax-7 2015 ax-8 2113 ax-9 2121 ax-10 2142 ax-11 2158 ax-12 2175 ax-ext 2770 ax-rep 5154 ax-sep 5167 ax-nul 5174 ax-pow 5231 ax-pr 5295 ax-un 7441 |
This theorem depends on definitions: df-bi 210 df-an 400 df-or 845 df-3an 1086 df-tru 1541 df-ex 1782 df-nf 1786 df-sb 2070 df-mo 2598 df-eu 2629 df-clab 2777 df-cleq 2791 df-clel 2870 df-nfc 2938 df-ne 2988 df-nel 3092 df-ral 3111 df-rex 3112 df-reu 3113 df-rab 3115 df-v 3443 df-sbc 3721 df-csb 3829 df-dif 3884 df-un 3886 df-in 3888 df-ss 3898 df-nul 4244 df-if 4426 df-pw 4499 df-sn 4526 df-pr 4528 df-op 4532 df-uni 4801 df-iun 4883 df-br 5031 df-opab 5093 df-mpt 5111 df-id 5425 df-xp 5525 df-rel 5526 df-cnv 5527 df-co 5528 df-dm 5529 df-rn 5530 df-res 5531 df-ima 5532 df-suc 6165 df-iota 6283 df-fun 6326 df-fn 6327 df-f 6328 df-f1 6329 df-fo 6330 df-f1o 6331 df-fv 6332 df-ov 7138 df-oprab 7139 df-mpo 7140 df-1o 8085 df-map 8391 df-en 8493 df-fbas 20088 df-top 21499 df-topon 21516 df-nei 21703 df-haus 21920 df-fil 22451 df-flim 22544 df-flf 22545 |
This theorem is referenced by: cnextfvval 22670 cnextcn 22672 cnextfres1 22673 |
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