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Mirrors > Home > MPE Home > Th. List > csbco3g | Structured version Visualization version Unicode version |
Description: Composition of two class substitutions. (Contributed by NM, 27-Nov-2005.) (Revised by Mario Carneiro, 11-Nov-2016.) |
Ref | Expression |
---|---|
sbcco3g.1 |
Ref | Expression |
---|---|
csbco3g |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | csbnestg 3998 | . 2 | |
2 | elex 3212 | . . . 4 | |
3 | nfcvd 2765 | . . . . 5 | |
4 | sbcco3g.1 | . . . . 5 | |
5 | 3, 4 | csbiegf 3557 | . . . 4 |
6 | 2, 5 | syl 17 | . . 3 |
7 | 6 | csbeq1d 3540 | . 2 |
8 | 1, 7 | eqtrd 2656 | 1 |
Colors of variables: wff setvar class |
Syntax hints: wi 4 wceq 1483 wcel 1990 cvv 3200 csb 3533 |
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-9 1999 ax-10 2019 ax-11 2034 ax-12 2047 ax-13 2246 ax-ext 2602 |
This theorem depends on definitions: df-bi 197 df-or 385 df-an 386 df-3an 1039 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-v 3202 df-sbc 3436 df-csb 3534 |
This theorem is referenced by: (None) |
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