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| Mirrors > Home > MPE Home > Th. List > Mathboxes > fvbigcup | Structured version Visualization version GIF version | ||
| Description: For sets, Bigcup yields union. (Contributed by Scott Fenton, 11-Apr-2012.) |
| Ref | Expression |
|---|---|
| fvbigcup.1 | ⊢ 𝐴 ∈ V |
| Ref | Expression |
|---|---|
| fvbigcup | ⊢ ( Bigcup ‘𝐴) = ∪ 𝐴 |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | eqid 2763 | . . 3 ⊢ ∪ 𝐴 = ∪ 𝐴 | |
| 2 | fvbigcup.1 | . . . . 5 ⊢ 𝐴 ∈ V | |
| 3 | 2 | uniex 7779 | . . . 4 ⊢ ∪ 𝐴 ∈ V |
| 4 | 3 | brbigcup 36837 | . . 3 ⊢ (𝐴 Bigcup ∪ 𝐴 ↔ ∪ 𝐴 = ∪ 𝐴) |
| 5 | 1, 4 | mpbir 234 | . 2 ⊢ 𝐴 Bigcup ∪ 𝐴 |
| 6 | fnbigcup 36840 | . . 3 ⊢ Bigcup Fn V | |
| 7 | fnbrfvb 6955 | . . 3 ⊢ (( Bigcup Fn V ∧ 𝐴 ∈ V) → (( Bigcup ‘𝐴) = ∪ 𝐴 ↔ 𝐴 Bigcup ∪ 𝐴)) | |
| 8 | 6, 2, 7 | mp2an 705 | . 2 ⊢ (( Bigcup ‘𝐴) = ∪ 𝐴 ↔ 𝐴 Bigcup ∪ 𝐴) |
| 9 | 5, 8 | mpbir 234 | 1 ⊢ ( Bigcup ‘𝐴) = ∪ 𝐴 |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ↔ wb 209 = wceq 1570 ∈ wcel 2147 Vcvv 3454 ∪ cuni 4870 class class class wbr 5106 Fn wfn 6550 ‘cfv 6555 Bigcup cbigcup 36773 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1945 ax-6 2002 ax-7 2043 ax-8 2149 ax-9 2157 ax-10 2180 ax-11 2197 ax-12 2216 ax-ext 2735 ax-sep 5252 ax-nul 5263 ax-pow 5331 ax-pr 5395 ax-un 7772 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2102 df-mo 2567 df-eu 2597 df-clab 2742 df-cleq 2755 df-clel 2839 df-nfc 2913 df-ne 2960 df-ral 3081 df-rex 3091 df-rab 3417 df-v 3456 df-ss 3901 df-dif 4050 df-in 4094 df-un 4154 df-symdif 4201 df-nul 4282 df-if 4486 df-pw 4562 df-sn 4589 df-pr 4591 df-op 4839 df-uni 4871 df-br 5107 df-opab 5171 df-mpt 5190 df-id 5550 df-eprel 5555 df-xp 5661 df-rel 5662 df-cnv 5663 df-co 5664 df-dm 5665 df-rn 5666 df-res 5667 df-iota 6509 df-fun 6557 df-fn 6558 df-f 6559 df-fo 6561 df-fv 6563 df-1st 8022 df-2nd 8023 df-txp 36793 df-bigcup 36797 |
| This theorem is used by: (None) |
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