| Mathbox for Zhi Wang |
< Previous
Next >
Nearby theorems |
||
| Mirrors > Home > MPE Home > Th. List > Mathboxes > ipolub00 | Structured version Visualization version GIF version | ||
| Description: The LUB of the empty set is the empty set if it is contained. (Contributed by Zhi Wang, 30-Sep-2024.) |
| Ref | Expression |
|---|---|
| ipoglb0.i | ⊢ 𝐼 = (toInc‘𝐹) |
| ipolub00.u | ⊢ (𝜑 → 𝑈 = (lub‘𝐼)) |
| ipolub00.f | ⊢ (𝜑 → ∅ ∈ 𝐹) |
| Ref | Expression |
|---|---|
| ipolub00 | ⊢ (𝜑 → (𝑈‘∅) = ∅) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | ipoglb0.i | . . . 4 ⊢ 𝐼 = (toInc‘𝐹) | |
| 2 | ipolub00.u | . . . . 5 ⊢ (𝜑 → 𝑈 = (lub‘𝐼)) | |
| 3 | 2 | adantr 480 | . . . 4 ⊢ ((𝜑 ∧ 𝐹 ∈ V) → 𝑈 = (lub‘𝐼)) |
| 4 | ipolub00.f | . . . . . . 7 ⊢ (𝜑 → ∅ ∈ 𝐹) | |
| 5 | int0el 4935 | . . . . . . 7 ⊢ (∅ ∈ 𝐹 → ∩ 𝐹 = ∅) | |
| 6 | 4, 5 | syl 17 | . . . . . 6 ⊢ (𝜑 → ∩ 𝐹 = ∅) |
| 7 | 6, 4 | eqeltrd 2837 | . . . . 5 ⊢ (𝜑 → ∩ 𝐹 ∈ 𝐹) |
| 8 | 7 | adantr 480 | . . . 4 ⊢ ((𝜑 ∧ 𝐹 ∈ V) → ∩ 𝐹 ∈ 𝐹) |
| 9 | simpr 484 | . . . 4 ⊢ ((𝜑 ∧ 𝐹 ∈ V) → 𝐹 ∈ V) | |
| 10 | 1, 3, 8, 9 | ipolub0 49273 | . . 3 ⊢ ((𝜑 ∧ 𝐹 ∈ V) → (𝑈‘∅) = ∩ 𝐹) |
| 11 | 6 | adantr 480 | . . 3 ⊢ ((𝜑 ∧ 𝐹 ∈ V) → ∩ 𝐹 = ∅) |
| 12 | 10, 11 | eqtrd 2772 | . 2 ⊢ ((𝜑 ∧ 𝐹 ∈ V) → (𝑈‘∅) = ∅) |
| 13 | 2 | adantr 480 | . . . . 5 ⊢ ((𝜑 ∧ ¬ 𝐹 ∈ V) → 𝑈 = (lub‘𝐼)) |
| 14 | fvprc 6827 | . . . . . . . 8 ⊢ (¬ 𝐹 ∈ V → (toInc‘𝐹) = ∅) | |
| 15 | 14 | adantl 481 | . . . . . . 7 ⊢ ((𝜑 ∧ ¬ 𝐹 ∈ V) → (toInc‘𝐹) = ∅) |
| 16 | 1, 15 | eqtrid 2784 | . . . . . 6 ⊢ ((𝜑 ∧ ¬ 𝐹 ∈ V) → 𝐼 = ∅) |
| 17 | 16 | fveq2d 6839 | . . . . 5 ⊢ ((𝜑 ∧ ¬ 𝐹 ∈ V) → (lub‘𝐼) = (lub‘∅)) |
| 18 | 13, 17 | eqtrd 2772 | . . . 4 ⊢ ((𝜑 ∧ ¬ 𝐹 ∈ V) → 𝑈 = (lub‘∅)) |
| 19 | 18 | fveq1d 6837 | . . 3 ⊢ ((𝜑 ∧ ¬ 𝐹 ∈ V) → (𝑈‘∅) = ((lub‘∅)‘∅)) |
| 20 | rex0 4313 | . . . . . 6 ⊢ ¬ ∃𝑥 ∈ ∅ (∀𝑦 ∈ ∅ 𝑦(le‘∅)𝑥 ∧ ∀𝑧 ∈ ∅ (∀𝑦 ∈ ∅ 𝑦(le‘∅)𝑧 → 𝑥(le‘∅)𝑧)) | |
| 21 | 20 | intnan 486 | . . . . 5 ⊢ ¬ (∅ ⊆ ∅ ∧ ∃𝑥 ∈ ∅ (∀𝑦 ∈ ∅ 𝑦(le‘∅)𝑥 ∧ ∀𝑧 ∈ ∅ (∀𝑦 ∈ ∅ 𝑦(le‘∅)𝑧 → 𝑥(le‘∅)𝑧))) |
| 22 | base0 17145 | . . . . . 6 ⊢ ∅ = (Base‘∅) | |
| 23 | eqid 2737 | . . . . . 6 ⊢ (le‘∅) = (le‘∅) | |
| 24 | eqid 2737 | . . . . . 6 ⊢ (lub‘∅) = (lub‘∅) | |
| 25 | biid 261 | . . . . . 6 ⊢ ((∀𝑦 ∈ ∅ 𝑦(le‘∅)𝑥 ∧ ∀𝑧 ∈ ∅ (∀𝑦 ∈ ∅ 𝑦(le‘∅)𝑧 → 𝑥(le‘∅)𝑧)) ↔ (∀𝑦 ∈ ∅ 𝑦(le‘∅)𝑥 ∧ ∀𝑧 ∈ ∅ (∀𝑦 ∈ ∅ 𝑦(le‘∅)𝑧 → 𝑥(le‘∅)𝑧))) | |
| 26 | 0pos 18248 | . . . . . . 7 ⊢ ∅ ∈ Poset | |
| 27 | 26 | a1i 11 | . . . . . 6 ⊢ ((𝜑 ∧ ¬ 𝐹 ∈ V) → ∅ ∈ Poset) |
| 28 | 22, 23, 24, 25, 27 | lubeldm2 49237 | . . . . 5 ⊢ ((𝜑 ∧ ¬ 𝐹 ∈ V) → (∅ ∈ dom (lub‘∅) ↔ (∅ ⊆ ∅ ∧ ∃𝑥 ∈ ∅ (∀𝑦 ∈ ∅ 𝑦(le‘∅)𝑥 ∧ ∀𝑧 ∈ ∅ (∀𝑦 ∈ ∅ 𝑦(le‘∅)𝑧 → 𝑥(le‘∅)𝑧))))) |
| 29 | 21, 28 | mtbiri 327 | . . . 4 ⊢ ((𝜑 ∧ ¬ 𝐹 ∈ V) → ¬ ∅ ∈ dom (lub‘∅)) |
| 30 | ndmfv 6867 | . . . 4 ⊢ (¬ ∅ ∈ dom (lub‘∅) → ((lub‘∅)‘∅) = ∅) | |
| 31 | 29, 30 | syl 17 | . . 3 ⊢ ((𝜑 ∧ ¬ 𝐹 ∈ V) → ((lub‘∅)‘∅) = ∅) |
| 32 | 19, 31 | eqtrd 2772 | . 2 ⊢ ((𝜑 ∧ ¬ 𝐹 ∈ V) → (𝑈‘∅) = ∅) |
| 33 | 12, 32 | pm2.61dan 813 | 1 ⊢ (𝜑 → (𝑈‘∅) = ∅) |
| Colors of variables: wff setvar class |
| Syntax hints: ¬ wn 3 → wi 4 ∧ wa 395 = wceq 1542 ∈ wcel 2114 ∀wral 3052 ∃wrex 3061 Vcvv 3441 ⊆ wss 3902 ∅c0 4286 ∩ cint 4903 class class class wbr 5099 dom cdm 5625 ‘cfv 6493 lecple 17188 Posetcpo 18234 lubclub 18236 toInccipo 18454 |
| 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 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-10 2147 ax-11 2163 ax-12 2185 ax-ext 2709 ax-rep 5225 ax-sep 5242 ax-nul 5252 ax-pow 5311 ax-pr 5378 ax-un 7682 ax-cnex 11086 ax-resscn 11087 ax-1cn 11088 ax-icn 11089 ax-addcl 11090 ax-addrcl 11091 ax-mulcl 11092 ax-mulrcl 11093 ax-mulcom 11094 ax-addass 11095 ax-mulass 11096 ax-distr 11097 ax-i2m1 11098 ax-1ne0 11099 ax-1rid 11100 ax-rnegex 11101 ax-rrecex 11102 ax-cnre 11103 ax-pre-lttri 11104 ax-pre-lttrn 11105 ax-pre-ltadd 11106 ax-pre-mulgt0 11107 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3or 1088 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-nf 1786 df-sb 2069 df-mo 2540 df-eu 2570 df-clab 2716 df-cleq 2729 df-clel 2812 df-nfc 2886 df-ne 2934 df-nel 3038 df-ral 3053 df-rex 3062 df-rmo 3351 df-reu 3352 df-rab 3401 df-v 3443 df-sbc 3742 df-csb 3851 df-dif 3905 df-un 3907 df-in 3909 df-ss 3919 df-pss 3922 df-nul 4287 df-if 4481 df-pw 4557 df-sn 4582 df-pr 4584 df-op 4588 df-uni 4865 df-int 4904 df-iun 4949 df-br 5100 df-opab 5162 df-mpt 5181 df-tr 5207 df-id 5520 df-eprel 5525 df-po 5533 df-so 5534 df-fr 5578 df-we 5580 df-xp 5631 df-rel 5632 df-cnv 5633 df-co 5634 df-dm 5635 df-rn 5636 df-res 5637 df-ima 5638 df-pred 6260 df-ord 6321 df-on 6322 df-lim 6323 df-suc 6324 df-iota 6449 df-fun 6495 df-fn 6496 df-f 6497 df-f1 6498 df-fo 6499 df-f1o 6500 df-fv 6501 df-riota 7317 df-ov 7363 df-oprab 7364 df-mpo 7365 df-om 7811 df-1st 7935 df-2nd 7936 df-frecs 8225 df-wrecs 8256 df-recs 8305 df-rdg 8343 df-1o 8399 df-er 8637 df-en 8888 df-dom 8889 df-sdom 8890 df-fin 8891 df-pnf 11172 df-mnf 11173 df-xr 11174 df-ltxr 11175 df-le 11176 df-sub 11370 df-neg 11371 df-nn 12150 df-2 12212 df-3 12213 df-4 12214 df-5 12215 df-6 12216 df-7 12217 df-8 12218 df-9 12219 df-n0 12406 df-z 12493 df-dec 12612 df-uz 12756 df-fz 13428 df-struct 17078 df-slot 17113 df-ndx 17125 df-base 17141 df-tset 17200 df-ple 17201 df-ocomp 17202 df-proset 18221 df-poset 18240 df-lub 18271 df-ipo 18455 |
| This theorem is referenced by: (None) |
| Copyright terms: Public domain | W3C validator |