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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 4949 | . . 3 ⊢ (𝐴 ⊆ 𝐵 → ∪ 𝑥 ∈ 𝐴 𝐶 ⊆ ∪ 𝑥 ∈ 𝐵 𝐶) | |
| 2 | iunss1 4949 | . . 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 3938 | . 2 ⊢ (𝐴 = 𝐵 ↔ (𝐴 ⊆ 𝐵 ∧ 𝐵 ⊆ 𝐴)) | |
| 5 | eqss 3938 | . 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 3890 ∪ ciun 4934 |
| 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 3432 df-ss 3907 df-iun 4936 |
| This theorem is referenced by: iuneq1d 4962 iinvdif 5023 iunxprg 5039 iununi 5042 iunsuc 6405 funopsn 7096 funiunfv 7197 onfununi 8275 iunfi 9247 ttrclselem1 9640 ttrclselem2 9641 rankuni2b 9771 pwsdompw 10119 ackbij1lem7 10141 r1om 10159 fictb 10160 cfsmolem 10186 ituniiun 10338 domtriomlem 10358 domtriom 10359 inar1 10692 fsum2d 15727 fsumiun 15778 ackbijnn 15787 fprod2d 15940 prmreclem5 16885 lpival 21317 fiuncmp 23382 ovolfiniun 25481 ovoliunnul 25487 finiunmbl 25524 volfiniun 25527 voliunlem1 25530 iuninc 32648 ofpreima2 32757 gsumpart 33142 esum2dlem 34255 sigaclfu2 34284 sigapildsyslem 34324 fiunelros 34337 bnj548 35058 bnj554 35060 bnj594 35073 neibastop2lem 36561 ttceq 36689 istotbnd3 38109 0totbnd 38111 sstotbnd2 38112 sstotbnd 38113 sstotbnd3 38114 totbndbnd 38127 prdstotbnd 38132 cntotbnd 38134 heibor 38159 dfrcl4 44124 iunrelexp0 44150 comptiunov2i 44154 corclrcl 44155 cotrcltrcl 44173 trclfvdecomr 44176 dfrtrcl4 44186 corcltrcl 44187 cotrclrcl 44190 fiiuncl 45517 sge0iunmptlemfi 46862 caragenfiiuncl 46964 carageniuncllem1 46970 ovnsubadd2lem 47094 |
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