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Mirrors > Home > ILE Home > Th. List > Mathboxes > sbthomlem | GIF version |
Description: Lemma for sbthom 13396. (Contributed by Mario Carneiro and Jim Kingdon, 13-Jul-2023.) |
Ref | Expression |
---|---|
sbthomlem.lpo | ⊢ (𝜑 → ω ∈ Omni) |
sbthomlem.y | ⊢ (𝜑 → 𝑌 ⊆ {∅}) |
sbthomlem.f | ⊢ (𝜑 → 𝐹:ω–1-1-onto→(𝑌 ⊔ ω)) |
Ref | Expression |
---|---|
sbthomlem | ⊢ (𝜑 → (𝑌 = ∅ ∨ 𝑌 = {∅})) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | sbthomlem.lpo | . . . 4 ⊢ (𝜑 → ω ∈ Omni) | |
2 | sbthomlem.f | . . . . 5 ⊢ (𝜑 → 𝐹:ω–1-1-onto→(𝑌 ⊔ ω)) | |
3 | f1ofo 5382 | . . . . 5 ⊢ (𝐹:ω–1-1-onto→(𝑌 ⊔ ω) → 𝐹:ω–onto→(𝑌 ⊔ ω)) | |
4 | 2, 3 | syl 14 | . . . 4 ⊢ (𝜑 → 𝐹:ω–onto→(𝑌 ⊔ ω)) |
5 | 1, 4 | fodjuomni 7029 | . . 3 ⊢ (𝜑 → (∃𝑧 𝑧 ∈ 𝑌 ∨ 𝑌 = ∅)) |
6 | 5 | orcomd 719 | . 2 ⊢ (𝜑 → (𝑌 = ∅ ∨ ∃𝑧 𝑧 ∈ 𝑌)) |
7 | sbthomlem.y | . . . 4 ⊢ (𝜑 → 𝑌 ⊆ {∅}) | |
8 | sssnm 3689 | . . . 4 ⊢ (∃𝑧 𝑧 ∈ 𝑌 → (𝑌 ⊆ {∅} ↔ 𝑌 = {∅})) | |
9 | 7, 8 | syl5ibcom 154 | . . 3 ⊢ (𝜑 → (∃𝑧 𝑧 ∈ 𝑌 → 𝑌 = {∅})) |
10 | 9 | orim2d 778 | . 2 ⊢ (𝜑 → ((𝑌 = ∅ ∨ ∃𝑧 𝑧 ∈ 𝑌) → (𝑌 = ∅ ∨ 𝑌 = {∅}))) |
11 | 6, 10 | mpd 13 | 1 ⊢ (𝜑 → (𝑌 = ∅ ∨ 𝑌 = {∅})) |
Colors of variables: wff set class |
Syntax hints: → wi 4 ∨ wo 698 = wceq 1332 ∃wex 1469 ∈ wcel 1481 ⊆ wss 3076 ∅c0 3368 {csn 3532 ωcom 4512 –onto→wfo 5129 –1-1-onto→wf1o 5130 ⊔ cdju 6930 Omnicomni 7012 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 ax-in1 604 ax-in2 605 ax-io 699 ax-5 1424 ax-7 1425 ax-gen 1426 ax-ie1 1470 ax-ie2 1471 ax-8 1483 ax-10 1484 ax-11 1485 ax-i12 1486 ax-bndl 1487 ax-4 1488 ax-13 1492 ax-14 1493 ax-17 1507 ax-i9 1511 ax-ial 1515 ax-i5r 1516 ax-ext 2122 ax-sep 4054 ax-nul 4062 ax-pow 4106 ax-pr 4139 ax-un 4363 ax-setind 4460 |
This theorem depends on definitions: df-bi 116 df-dc 821 df-3an 965 df-tru 1335 df-fal 1338 df-nf 1438 df-sb 1737 df-eu 2003 df-mo 2004 df-clab 2127 df-cleq 2133 df-clel 2136 df-nfc 2271 df-ne 2310 df-ral 2422 df-rex 2423 df-rab 2426 df-v 2691 df-sbc 2914 df-csb 3008 df-dif 3078 df-un 3080 df-in 3082 df-ss 3089 df-nul 3369 df-if 3480 df-pw 3517 df-sn 3538 df-pr 3539 df-op 3541 df-uni 3745 df-int 3780 df-br 3938 df-opab 3998 df-mpt 3999 df-tr 4035 df-id 4223 df-iord 4296 df-on 4298 df-suc 4301 df-iom 4513 df-xp 4553 df-rel 4554 df-cnv 4555 df-co 4556 df-dm 4557 df-rn 4558 df-res 4559 df-ima 4560 df-iota 5096 df-fun 5133 df-fn 5134 df-f 5135 df-f1 5136 df-fo 5137 df-f1o 5138 df-fv 5139 df-ov 5785 df-oprab 5786 df-mpo 5787 df-1st 6046 df-2nd 6047 df-1o 6321 df-2o 6322 df-map 6552 df-dju 6931 df-inl 6940 df-inr 6941 df-omni 7014 |
This theorem is referenced by: sbthom 13396 |
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