Intuitionistic Logic Explorer |
< Previous
Next >
Nearby theorems |
||
Mirrors > Home > ILE Home > Th. List > djuenun | GIF version |
Description: Disjoint union is equinumerous to union for disjoint sets. (Contributed by Mario Carneiro, 29-Apr-2015.) (Revised by Jim Kingdon, 19-Aug-2023.) |
Ref | Expression |
---|---|
djuenun | ⊢ ((𝐴 ≈ 𝐵 ∧ 𝐶 ≈ 𝐷 ∧ (𝐵 ∩ 𝐷) = ∅) → (𝐴 ⊔ 𝐶) ≈ (𝐵 ∪ 𝐷)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | djuen 7167 | . . 3 ⊢ ((𝐴 ≈ 𝐵 ∧ 𝐶 ≈ 𝐷) → (𝐴 ⊔ 𝐶) ≈ (𝐵 ⊔ 𝐷)) | |
2 | 1 | 3adant3 1007 | . 2 ⊢ ((𝐴 ≈ 𝐵 ∧ 𝐶 ≈ 𝐷 ∧ (𝐵 ∩ 𝐷) = ∅) → (𝐴 ⊔ 𝐶) ≈ (𝐵 ⊔ 𝐷)) |
3 | relen 6710 | . . . 4 ⊢ Rel ≈ | |
4 | 3 | brrelex2i 4648 | . . 3 ⊢ (𝐴 ≈ 𝐵 → 𝐵 ∈ V) |
5 | 3 | brrelex2i 4648 | . . 3 ⊢ (𝐶 ≈ 𝐷 → 𝐷 ∈ V) |
6 | id 19 | . . 3 ⊢ ((𝐵 ∩ 𝐷) = ∅ → (𝐵 ∩ 𝐷) = ∅) | |
7 | endjudisj 7166 | . . 3 ⊢ ((𝐵 ∈ V ∧ 𝐷 ∈ V ∧ (𝐵 ∩ 𝐷) = ∅) → (𝐵 ⊔ 𝐷) ≈ (𝐵 ∪ 𝐷)) | |
8 | 4, 5, 6, 7 | syl3an 1270 | . 2 ⊢ ((𝐴 ≈ 𝐵 ∧ 𝐶 ≈ 𝐷 ∧ (𝐵 ∩ 𝐷) = ∅) → (𝐵 ⊔ 𝐷) ≈ (𝐵 ∪ 𝐷)) |
9 | entr 6750 | . 2 ⊢ (((𝐴 ⊔ 𝐶) ≈ (𝐵 ⊔ 𝐷) ∧ (𝐵 ⊔ 𝐷) ≈ (𝐵 ∪ 𝐷)) → (𝐴 ⊔ 𝐶) ≈ (𝐵 ∪ 𝐷)) | |
10 | 2, 8, 9 | syl2anc 409 | 1 ⊢ ((𝐴 ≈ 𝐵 ∧ 𝐶 ≈ 𝐷 ∧ (𝐵 ∩ 𝐷) = ∅) → (𝐴 ⊔ 𝐶) ≈ (𝐵 ∪ 𝐷)) |
Colors of variables: wff set class |
Syntax hints: → wi 4 ∧ w3a 968 = wceq 1343 ∈ wcel 2136 Vcvv 2726 ∪ cun 3114 ∩ cin 3115 ∅c0 3409 class class class wbr 3982 ≈ cen 6704 ⊔ cdju 7002 |
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 1435 ax-7 1436 ax-gen 1437 ax-ie1 1481 ax-ie2 1482 ax-8 1492 ax-10 1493 ax-11 1494 ax-i12 1495 ax-bndl 1497 ax-4 1498 ax-17 1514 ax-i9 1518 ax-ial 1522 ax-i5r 1523 ax-13 2138 ax-14 2139 ax-ext 2147 ax-coll 4097 ax-sep 4100 ax-nul 4108 ax-pow 4153 ax-pr 4187 ax-un 4411 |
This theorem depends on definitions: df-bi 116 df-3an 970 df-tru 1346 df-fal 1349 df-nf 1449 df-sb 1751 df-eu 2017 df-mo 2018 df-clab 2152 df-cleq 2158 df-clel 2161 df-nfc 2297 df-ne 2337 df-ral 2449 df-rex 2450 df-reu 2451 df-rab 2453 df-v 2728 df-sbc 2952 df-csb 3046 df-dif 3118 df-un 3120 df-in 3122 df-ss 3129 df-nul 3410 df-pw 3561 df-sn 3582 df-pr 3583 df-op 3585 df-uni 3790 df-iun 3868 df-br 3983 df-opab 4044 df-mpt 4045 df-tr 4081 df-id 4271 df-iord 4344 df-on 4346 df-suc 4349 df-xp 4610 df-rel 4611 df-cnv 4612 df-co 4613 df-dm 4614 df-rn 4615 df-res 4616 df-ima 4617 df-iota 5153 df-fun 5190 df-fn 5191 df-f 5192 df-f1 5193 df-fo 5194 df-f1o 5195 df-fv 5196 df-1st 6108 df-2nd 6109 df-1o 6384 df-er 6501 df-en 6707 df-dju 7003 df-inl 7012 df-inr 7013 |
This theorem is referenced by: dju1en 7169 djucomen 7172 djuassen 7173 xpdjuen 7174 |
Copyright terms: Public domain | W3C validator |