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Mirrors > Home > MPE Home > Th. List > Mathboxes > setrec1lem2 | Structured version Visualization version Unicode version |
Description: Lemma for setrec1 42438. If a family of sets are all recursively generated by , so is their union. In this theorem, is a family of sets which are all elements of , and is any class. Use dfss3 3592, equivalence and equality theorems, and unissb at the end. Sandwich with applications of setrec1lem1. (Contributed by Emmett Weisz, 24-Jan-2021.) (New usage is discouraged.) |
Ref | Expression |
---|---|
setrec1lem2.1 | |
setrec1lem2.2 | |
setrec1lem2.3 |
Ref | Expression |
---|---|
setrec1lem2 |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | setrec1lem2.3 | . . . . . . 7 | |
2 | dfss3 3592 | . . . . . . 7 | |
3 | 1, 2 | sylib 208 | . . . . . 6 |
4 | setrec1lem2.1 | . . . . . . . 8 | |
5 | vex 3203 | . . . . . . . . 9 | |
6 | 5 | a1i 11 | . . . . . . . 8 |
7 | 4, 6 | setrec1lem1 42434 | . . . . . . 7 |
8 | 7 | ralbidv 2986 | . . . . . 6 |
9 | 3, 8 | mpbid 222 | . . . . 5 |
10 | ralcom4 3224 | . . . . 5 | |
11 | 9, 10 | sylib 208 | . . . 4 |
12 | nfra1 2941 | . . . . . 6 | |
13 | nfv 1843 | . . . . . 6 | |
14 | rsp 2929 | . . . . . . . 8 | |
15 | elssuni 4467 | . . . . . . . . . . . 12 | |
16 | sstr2 3610 | . . . . . . . . . . . 12 | |
17 | 15, 16 | syl5com 31 | . . . . . . . . . . 11 |
18 | 17 | imim1d 82 | . . . . . . . . . 10 |
19 | 18 | alimdv 1845 | . . . . . . . . 9 |
20 | 19 | imim1d 82 | . . . . . . . 8 |
21 | 14, 20 | sylcom 30 | . . . . . . 7 |
22 | 21 | com23 86 | . . . . . 6 |
23 | 12, 13, 22 | ralrimd 2959 | . . . . 5 |
24 | 23 | alimi 1739 | . . . 4 |
25 | 11, 24 | syl 17 | . . 3 |
26 | unissb 4469 | . . . . 5 | |
27 | 26 | imbi2i 326 | . . . 4 |
28 | 27 | albii 1747 | . . 3 |
29 | 25, 28 | sylibr 224 | . 2 |
30 | setrec1lem2.2 | . . . 4 | |
31 | uniexg 6955 | . . . 4 | |
32 | 30, 31 | syl 17 | . . 3 |
33 | 4, 32 | setrec1lem1 42434 | . 2 |
34 | 29, 33 | mpbird 247 | 1 |
Colors of variables: wff setvar class |
Syntax hints: wi 4 wal 1481 wceq 1483 wcel 1990 cab 2608 wral 2912 cvv 3200 wss 3574 cuni 4436 cfv 5888 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1722 ax-4 1737 ax-5 1839 ax-6 1888 ax-7 1935 ax-8 1992 ax-9 1999 ax-10 2019 ax-11 2034 ax-12 2047 ax-13 2246 ax-ext 2602 ax-sep 4781 ax-un 6949 |
This theorem depends on definitions: df-bi 197 df-or 385 df-an 386 df-tru 1486 df-ex 1705 df-nf 1710 df-sb 1881 df-clab 2609 df-cleq 2615 df-clel 2618 df-nfc 2753 df-ral 2917 df-rex 2918 df-v 3202 df-in 3581 df-ss 3588 df-uni 4437 |
This theorem is referenced by: setrec1lem3 42436 |
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