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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 4935 | . . 3 ⊢ (𝐴 ⊆ 𝐵 → ∪ 𝑥 ∈ 𝐴 𝐶 ⊆ ∪ 𝑥 ∈ 𝐵 𝐶) | |
2 | iunss1 4935 | . . 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 3984 | . 2 ⊢ (𝐴 = 𝐵 ↔ (𝐴 ⊆ 𝐵 ∧ 𝐵 ⊆ 𝐴)) | |
5 | eqss 3984 | . 2 ⊢ (∪ 𝑥 ∈ 𝐴 𝐶 = ∪ 𝑥 ∈ 𝐵 𝐶 ↔ (∪ 𝑥 ∈ 𝐴 𝐶 ⊆ ∪ 𝑥 ∈ 𝐵 𝐶 ∧ ∪ 𝑥 ∈ 𝐵 𝐶 ⊆ ∪ 𝑥 ∈ 𝐴 𝐶)) | |
6 | 3, 4, 5 | 3imtr4i 294 | 1 ⊢ (𝐴 = 𝐵 → ∪ 𝑥 ∈ 𝐴 𝐶 = ∪ 𝑥 ∈ 𝐵 𝐶) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 398 = wceq 1537 ⊆ wss 3938 ∪ ciun 4921 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1970 ax-7 2015 ax-8 2116 ax-9 2124 ax-10 2145 ax-11 2161 ax-12 2177 ax-ext 2795 |
This theorem depends on definitions: df-bi 209 df-an 399 df-or 844 df-tru 1540 df-ex 1781 df-nf 1785 df-sb 2070 df-clab 2802 df-cleq 2816 df-clel 2895 df-nfc 2965 df-ral 3145 df-rex 3146 df-v 3498 df-in 3945 df-ss 3954 df-iun 4923 |
This theorem is referenced by: iuneq1d 4948 iinvdif 5004 iunxprg 5020 iununi 5023 iunsuc 6275 funopsn 6912 funiunfv 7009 onfununi 7980 iunfi 8814 rankuni2b 9284 pwsdompw 9628 ackbij1lem7 9650 r1om 9668 fictb 9669 cfsmolem 9694 ituniiun 9846 domtriomlem 9866 domtriom 9867 inar1 10199 fsum2d 15128 fsumiun 15178 ackbijnn 15185 fprod2d 15337 prmreclem5 16258 lpival 20020 fiuncmp 22014 ovolfiniun 24104 ovoliunnul 24110 finiunmbl 24147 volfiniun 24150 voliunlem1 24153 iuninc 30314 ofpreima2 30413 esum2dlem 31353 sigaclfu2 31382 sigapildsyslem 31422 fiunelros 31435 bnj548 32171 bnj554 32173 bnj594 32186 trpredlem1 33068 trpredtr 33071 trpredmintr 33072 trpredrec 33079 neibastop2lem 33710 istotbnd3 35051 0totbnd 35053 sstotbnd2 35054 sstotbnd 35055 sstotbnd3 35056 totbndbnd 35069 prdstotbnd 35074 cntotbnd 35076 heibor 35101 dfrcl4 40028 iunrelexp0 40054 comptiunov2i 40058 corclrcl 40059 cotrcltrcl 40077 trclfvdecomr 40080 dfrtrcl4 40090 corcltrcl 40091 cotrclrcl 40094 fiiuncl 41334 iuneq1i 41357 sge0iunmptlemfi 42702 caragenfiiuncl 42804 carageniuncllem1 42810 ovnsubadd2lem 42934 |
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