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| Mirrors > Home > MPE Home > Th. List > iuneq1 | Structured version Visualization version GIF version | ||
| Description: Equality theorem for indexed union. (Contributed by NM, 27-Jun-1998.) |
| Ref | Expression |
|---|---|
| iuneq1 | ⊢ (𝐴 = 𝐵 → ∪ 𝑥 ∈ 𝐴 𝐶 = ∪ 𝑥 ∈ 𝐵 𝐶) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | iunss1 4963 | . . 3 ⊢ (𝐴 ⊆ 𝐵 → ∪ 𝑥 ∈ 𝐴 𝐶 ⊆ ∪ 𝑥 ∈ 𝐵 𝐶) | |
| 2 | iunss1 4963 | . . 3 ⊢ (𝐵 ⊆ 𝐴 → ∪ 𝑥 ∈ 𝐵 𝐶 ⊆ ∪ 𝑥 ∈ 𝐴 𝐶) | |
| 3 | 1, 2 | anim12i 614 | . 2 ⊢ ((𝐴 ⊆ 𝐵 ∧ 𝐵 ⊆ 𝐴) → (∪ 𝑥 ∈ 𝐴 𝐶 ⊆ ∪ 𝑥 ∈ 𝐵 𝐶 ∧ ∪ 𝑥 ∈ 𝐵 𝐶 ⊆ ∪ 𝑥 ∈ 𝐴 𝐶)) |
| 4 | eqss 3951 | . 2 ⊢ (𝐴 = 𝐵 ↔ (𝐴 ⊆ 𝐵 ∧ 𝐵 ⊆ 𝐴)) | |
| 5 | eqss 3951 | . 2 ⊢ (∪ 𝑥 ∈ 𝐴 𝐶 = ∪ 𝑥 ∈ 𝐵 𝐶 ↔ (∪ 𝑥 ∈ 𝐴 𝐶 ⊆ ∪ 𝑥 ∈ 𝐵 𝐶 ∧ ∪ 𝑥 ∈ 𝐵 𝐶 ⊆ ∪ 𝑥 ∈ 𝐴 𝐶)) | |
| 6 | 3, 4, 5 | 3imtr4i 292 | 1 ⊢ (𝐴 = 𝐵 → ∪ 𝑥 ∈ 𝐴 𝐶 = ∪ 𝑥 ∈ 𝐵 𝐶) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∧ wa 395 = wceq 1542 ⊆ wss 3903 ∪ ciun 4948 |
| 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-ext 2709 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-tru 1545 df-ex 1782 df-sb 2069 df-clab 2716 df-cleq 2729 df-clel 2812 df-rex 3063 df-v 3444 df-ss 3920 df-iun 4950 |
| This theorem is referenced by: iuneq1d 4976 iinvdif 5037 iunxprg 5053 iununi 5056 iunsuc 6412 funopsn 7103 funiunfv 7204 onfununi 8283 iunfi 9255 ttrclselem1 9646 ttrclselem2 9647 rankuni2b 9777 pwsdompw 10125 ackbij1lem7 10147 r1om 10165 fictb 10166 cfsmolem 10192 ituniiun 10344 domtriomlem 10364 domtriom 10365 inar1 10698 fsum2d 15706 fsumiun 15756 ackbijnn 15763 fprod2d 15916 prmreclem5 16860 lpival 21291 fiuncmp 23360 ovolfiniun 25470 ovoliunnul 25476 finiunmbl 25513 volfiniun 25516 voliunlem1 25519 iuninc 32647 ofpreima2 32756 gsumpart 33157 esum2dlem 34270 sigaclfu2 34299 sigapildsyslem 34339 fiunelros 34352 bnj548 35073 bnj554 35075 bnj594 35088 neibastop2lem 36576 istotbnd3 38022 0totbnd 38024 sstotbnd2 38025 sstotbnd 38026 sstotbnd3 38027 totbndbnd 38040 prdstotbnd 38045 cntotbnd 38047 heibor 38072 dfrcl4 44032 iunrelexp0 44058 comptiunov2i 44062 corclrcl 44063 cotrcltrcl 44081 trclfvdecomr 44084 dfrtrcl4 44094 corcltrcl 44095 cotrclrcl 44098 fiiuncl 45425 sge0iunmptlemfi 46771 caragenfiiuncl 46873 carageniuncllem1 46879 ovnsubadd2lem 47003 |
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