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Mirrors > Home > MPE Home > Th. List > uniss | Structured version Visualization version GIF version |
Description: Subclass relationship for class union. Theorem 61 of [Suppes] p. 39. (Contributed by NM, 22-Mar-1998.) (Proof shortened by Andrew Salmon, 29-Jun-2011.) |
Ref | Expression |
---|---|
uniss | ⊢ (𝐴 ⊆ 𝐵 → ∪ 𝐴 ⊆ ∪ 𝐵) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | ssel 3562 | . . . . 5 ⊢ (𝐴 ⊆ 𝐵 → (𝑦 ∈ 𝐴 → 𝑦 ∈ 𝐵)) | |
2 | 1 | anim2d 587 | . . . 4 ⊢ (𝐴 ⊆ 𝐵 → ((𝑥 ∈ 𝑦 ∧ 𝑦 ∈ 𝐴) → (𝑥 ∈ 𝑦 ∧ 𝑦 ∈ 𝐵))) |
3 | 2 | eximdv 1833 | . . 3 ⊢ (𝐴 ⊆ 𝐵 → (∃𝑦(𝑥 ∈ 𝑦 ∧ 𝑦 ∈ 𝐴) → ∃𝑦(𝑥 ∈ 𝑦 ∧ 𝑦 ∈ 𝐵))) |
4 | eluni 4375 | . . 3 ⊢ (𝑥 ∈ ∪ 𝐴 ↔ ∃𝑦(𝑥 ∈ 𝑦 ∧ 𝑦 ∈ 𝐴)) | |
5 | eluni 4375 | . . 3 ⊢ (𝑥 ∈ ∪ 𝐵 ↔ ∃𝑦(𝑥 ∈ 𝑦 ∧ 𝑦 ∈ 𝐵)) | |
6 | 3, 4, 5 | 3imtr4g 284 | . 2 ⊢ (𝐴 ⊆ 𝐵 → (𝑥 ∈ ∪ 𝐴 → 𝑥 ∈ ∪ 𝐵)) |
7 | 6 | ssrdv 3574 | 1 ⊢ (𝐴 ⊆ 𝐵 → ∪ 𝐴 ⊆ ∪ 𝐵) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 383 ∃wex 1695 ∈ wcel 1977 ⊆ wss 3540 ∪ cuni 4372 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1713 ax-4 1728 ax-5 1827 ax-6 1875 ax-7 1922 ax-10 2006 ax-11 2021 ax-12 2034 ax-13 2234 ax-ext 2590 |
This theorem depends on definitions: df-bi 196 df-or 384 df-an 385 df-tru 1478 df-ex 1696 df-nf 1701 df-sb 1868 df-clab 2597 df-cleq 2603 df-clel 2606 df-nfc 2740 df-v 3175 df-in 3547 df-ss 3554 df-uni 4373 |
This theorem is referenced by: unissi 4397 unissd 4398 intssuni2 4437 uniintsn 4449 relfld 5578 dffv2 6181 trcl 8487 cflm 8955 coflim 8966 cfslbn 8972 fin23lem41 9057 fin1a2lem12 9116 tskuni 9484 prdsval 15938 prdsbas 15940 prdsplusg 15941 prdsmulr 15942 prdsvsca 15943 prdshom 15950 mrcssv 16097 catcfuccl 16582 catcxpccl 16670 mrelatlub 17009 mreclatBAD 17010 dprdres 18250 dmdprdsplit2lem 18267 tgcl 20584 distop 20610 fctop 20618 cctop 20620 neiptoptop 20745 cmpcld 21015 uncmp 21016 cmpfi 21021 comppfsc 21145 kgentopon 21151 txcmplem2 21255 filcon 21497 alexsubALTlem3 21663 alexsubALT 21665 ptcmplem3 21668 dyadmbllem 23173 shsupcl 27581 hsupss 27584 shatomistici 28604 pwuniss 28753 carsggect 29707 carsgclctun 29710 cvmliftlem15 30534 frrlem5c 31030 filnetlem3 31545 icoreunrn 32383 heiborlem1 32780 lssats 33317 lpssat 33318 lssatle 33320 lssat 33321 dicval 35483 pwsal 39211 prsal 39214 intsaluni 39223 |
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