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Mirrors > Home > MPE Home > Th. List > cbviunv | Structured version Visualization version GIF version |
Description: Rule used to change the bound variables in an indexed union, with the substitution specified implicitly by the hypothesis. (Contributed by NM, 15-Sep-2003.) Add disjoint variable condition to avoid ax-13 2386. See cbviunvg 4960 for a less restrictive version requiring more axioms. (Revised by Gino Giotto, 20-Jan-2024.) |
Ref | Expression |
---|---|
cbviunv.1 | ⊢ (𝑥 = 𝑦 → 𝐵 = 𝐶) |
Ref | Expression |
---|---|
cbviunv | ⊢ ∪ 𝑥 ∈ 𝐴 𝐵 = ∪ 𝑦 ∈ 𝐴 𝐶 |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | nfcv 2977 | . 2 ⊢ Ⅎ𝑦𝐵 | |
2 | nfcv 2977 | . 2 ⊢ Ⅎ𝑥𝐶 | |
3 | cbviunv.1 | . 2 ⊢ (𝑥 = 𝑦 → 𝐵 = 𝐶) | |
4 | 1, 2, 3 | cbviun 4954 | 1 ⊢ ∪ 𝑥 ∈ 𝐴 𝐵 = ∪ 𝑦 ∈ 𝐴 𝐶 |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 = wceq 1533 ∪ ciun 4912 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1792 ax-4 1806 ax-5 1907 ax-6 1966 ax-7 2011 ax-8 2112 ax-9 2120 ax-10 2141 ax-11 2156 ax-12 2172 ax-ext 2793 |
This theorem depends on definitions: df-bi 209 df-an 399 df-or 844 df-ex 1777 df-nf 1781 df-sb 2066 df-clab 2800 df-cleq 2814 df-clel 2893 df-nfc 2963 df-ral 3143 df-rex 3144 df-iun 4914 |
This theorem is referenced by: iunxdif2 4970 otiunsndisj 5403 onfununi 7972 oelim2 8215 marypha2lem2 8894 trcl 9164 r1om 9660 fictb 9661 cfsmolem 9686 cfsmo 9687 domtriomlem 9858 domtriom 9859 pwfseq 10080 wunex2 10154 wuncval2 10163 fsuppmapnn0fiubex 13354 s3iunsndisj 14322 ackbijnn 15177 smndex1basss 18064 smndex1mgm 18066 efgs1b 18856 ablfaclem3 19203 ptbasfi 22183 bcth3 23928 itg1climres 24309 suppovss 30420 hashunif 30522 bnj601 32187 cvmliftlem15 32540 trpredlem1 33061 trpredtr 33064 trpredmintr 33065 trpredrec 33072 neibastop2 33704 filnetlem4 33724 sstotbnd2 35046 heiborlem3 35085 heibor 35093 lcfr 38715 mapdrval 38777 corclrcl 40045 trclrelexplem 40049 dftrcl3 40058 cotrcltrcl 40063 dfrtrcl3 40071 corcltrcl 40077 cotrclrcl 40080 ssmapsn 41471 cnrefiisplem 42102 cnrefiisp 42103 meaiuninclem 42755 meaiuninc 42756 meaiininc 42762 carageniuncllem2 42797 caratheodorylem1 42801 caratheodorylem2 42802 caratheodory 42803 ovnsubadd 42847 hoidmv1le 42869 hoidmvle 42875 ovnhoilem2 42877 hspmbl 42904 ovnovollem3 42933 vonvolmbl 42936 smflimlem2 43041 smflimlem3 43042 smflimlem4 43043 smflim 43046 smflim2 43073 smflimsup 43095 otiunsndisjX 43471 |
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