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| Mirrors > Home > MPE Home > Th. List > lubsn | Structured version Visualization version GIF version | ||
| Description: The least upper bound of a singleton. (chsupsn 30653 analog.) (Contributed by NM, 20-Oct-2011.) |
| Ref | Expression |
|---|---|
| lubsn.b | β’ π΅ = (BaseβπΎ) |
| lubsn.u | β’ π = (lubβπΎ) |
| Ref | Expression |
|---|---|
| lubsn | β’ ((πΎ β Lat β§ π β π΅) β (πβ{π}) = π) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | dfsn2 4640 | . . . 4 β’ {π} = {π, π} | |
| 2 | 1 | fveq2i 6891 | . . 3 β’ (πβ{π}) = (πβ{π, π}) |
| 3 | lubsn.u | . . . 4 β’ π = (lubβπΎ) | |
| 4 | eqid 2732 | . . . 4 β’ (joinβπΎ) = (joinβπΎ) | |
| 5 | simpl 483 | . . . 4 β’ ((πΎ β Lat β§ π β π΅) β πΎ β Lat) | |
| 6 | simpr 485 | . . . 4 β’ ((πΎ β Lat β§ π β π΅) β π β π΅) | |
| 7 | 3, 4, 5, 6, 6 | joinval 18326 | . . 3 β’ ((πΎ β Lat β§ π β π΅) β (π(joinβπΎ)π) = (πβ{π, π})) |
| 8 | 2, 7 | eqtr4id 2791 | . 2 β’ ((πΎ β Lat β§ π β π΅) β (πβ{π}) = (π(joinβπΎ)π)) |
| 9 | lubsn.b | . . 3 β’ π΅ = (BaseβπΎ) | |
| 10 | 9, 4 | latjidm 18411 | . 2 β’ ((πΎ β Lat β§ π β π΅) β (π(joinβπΎ)π) = π) |
| 11 | 8, 10 | eqtrd 2772 | 1 β’ ((πΎ β Lat β§ π β π΅) β (πβ{π}) = π) |
| Colors of variables: wff setvar class |
| Syntax hints: β wi 4 β§ wa 396 = wceq 1541 β wcel 2106 {csn 4627 {cpr 4629 βcfv 6540 (class class class)co 7405 Basecbs 17140 lubclub 18258 joincjn 18260 Latclat 18380 |
| 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 1913 ax-6 1971 ax-7 2011 ax-8 2108 ax-9 2116 ax-10 2137 ax-11 2154 ax-12 2171 ax-ext 2703 ax-rep 5284 ax-sep 5298 ax-nul 5305 ax-pow 5362 ax-pr 5426 ax-un 7721 |
| This theorem depends on definitions: df-bi 206 df-an 397 df-or 846 df-3an 1089 df-tru 1544 df-fal 1554 df-ex 1782 df-nf 1786 df-sb 2068 df-mo 2534 df-eu 2563 df-clab 2710 df-cleq 2724 df-clel 2810 df-nfc 2885 df-ne 2941 df-ral 3062 df-rex 3071 df-rmo 3376 df-reu 3377 df-rab 3433 df-v 3476 df-sbc 3777 df-csb 3893 df-dif 3950 df-un 3952 df-in 3954 df-ss 3964 df-nul 4322 df-if 4528 df-pw 4603 df-sn 4628 df-pr 4630 df-op 4634 df-uni 4908 df-iun 4998 df-br 5148 df-opab 5210 df-mpt 5231 df-id 5573 df-xp 5681 df-rel 5682 df-cnv 5683 df-co 5684 df-dm 5685 df-rn 5686 df-res 5687 df-ima 5688 df-iota 6492 df-fun 6542 df-fn 6543 df-f 6544 df-f1 6545 df-fo 6546 df-f1o 6547 df-fv 6548 df-riota 7361 df-ov 7408 df-oprab 7409 df-proset 18244 df-poset 18262 df-lub 18295 df-glb 18296 df-join 18297 df-meet 18298 df-lat 18381 |
| This theorem is referenced by: lubel 18463 |
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