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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 4468 | . . 3 ⊢ (𝐴 ⊆ 𝐵 → ∪ 𝑥 ∈ 𝐴 𝐶 ⊆ ∪ 𝑥 ∈ 𝐵 𝐶) | |
2 | iunss1 4468 | . . 3 ⊢ (𝐵 ⊆ 𝐴 → ∪ 𝑥 ∈ 𝐵 𝐶 ⊆ ∪ 𝑥 ∈ 𝐴 𝐶) | |
3 | 1, 2 | anim12i 588 | . 2 ⊢ ((𝐴 ⊆ 𝐵 ∧ 𝐵 ⊆ 𝐴) → (∪ 𝑥 ∈ 𝐴 𝐶 ⊆ ∪ 𝑥 ∈ 𝐵 𝐶 ∧ ∪ 𝑥 ∈ 𝐵 𝐶 ⊆ ∪ 𝑥 ∈ 𝐴 𝐶)) |
4 | eqss 3583 | . 2 ⊢ (𝐴 = 𝐵 ↔ (𝐴 ⊆ 𝐵 ∧ 𝐵 ⊆ 𝐴)) | |
5 | eqss 3583 | . 2 ⊢ (∪ 𝑥 ∈ 𝐴 𝐶 = ∪ 𝑥 ∈ 𝐵 𝐶 ↔ (∪ 𝑥 ∈ 𝐴 𝐶 ⊆ ∪ 𝑥 ∈ 𝐵 𝐶 ∧ ∪ 𝑥 ∈ 𝐵 𝐶 ⊆ ∪ 𝑥 ∈ 𝐴 𝐶)) | |
6 | 3, 4, 5 | 3imtr4i 280 | 1 ⊢ (𝐴 = 𝐵 → ∪ 𝑥 ∈ 𝐴 𝐶 = ∪ 𝑥 ∈ 𝐵 𝐶) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 383 = wceq 1475 ⊆ wss 3540 ∪ ciun 4455 |
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-ral 2901 df-rex 2902 df-v 3175 df-in 3547 df-ss 3554 df-iun 4457 |
This theorem is referenced by: iuneq1d 4481 iinvdif 4528 iunxprg 4543 iununi 4546 iunsuc 5724 funopsn 6319 funiunfv 6410 onfununi 7325 iunfi 8137 rankuni2b 8599 pwsdompw 8909 ackbij1lem7 8931 r1om 8949 fictb 8950 cfsmolem 8975 ituniiun 9127 domtriomlem 9147 domtriom 9148 inar1 9476 fsum2d 14344 fsumiun 14394 ackbijnn 14399 fprod2d 14550 prmreclem5 15462 lpival 19066 fiuncmp 21017 ovolfiniun 23076 ovoliunnul 23082 finiunmbl 23119 volfiniun 23122 voliunlem1 23125 iuninc 28761 ofpreima2 28849 esum2dlem 29481 sigaclfu2 29511 sigapildsyslem 29551 fiunelros 29564 bnj548 30221 bnj554 30223 bnj594 30236 trpredlem1 30971 trpredtr 30974 trpredmintr 30975 trpredrec 30982 neibastop2lem 31525 istotbnd3 32740 0totbnd 32742 sstotbnd2 32743 sstotbnd 32744 sstotbnd3 32745 totbndbnd 32758 prdstotbnd 32763 cntotbnd 32765 heibor 32790 dfrcl4 36987 iunrelexp0 37013 comptiunov2i 37017 corclrcl 37018 cotrcltrcl 37036 trclfvdecomr 37039 dfrtrcl4 37049 corcltrcl 37050 cotrclrcl 37053 fiiuncl 38259 iuneq1i 38286 sge0iunmptlemfi 39306 caragenfiiuncl 39405 carageniuncllem1 39411 ovnsubadd2lem 39535 |
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