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Mirrors > Home > NFE Home > Th. List > csbeq2i | Unicode version |
Description: Formula-building inference rule for class substitution. (Contributed by NM, 10-Nov-2005.) (Revised by Mario Carneiro, 1-Sep-2015.) |
Ref | Expression |
---|---|
csbeq2i.1 |
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Ref | Expression |
---|---|
csbeq2i |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | csbeq2i.1 |
. . . 4
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2 | 1 | a1i 10 |
. . 3
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3 | 2 | csbeq2dv 3162 |
. 2
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4 | 3 | trud 1323 |
1
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Colors of variables: wff setvar class |
Syntax hints: ![]() ![]() ![]() |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1546 ax-5 1557 ax-17 1616 ax-9 1654 ax-8 1675 ax-6 1729 ax-7 1734 ax-11 1746 ax-12 1925 ax-ext 2334 |
This theorem depends on definitions: df-bi 177 df-an 360 df-tru 1319 df-ex 1542 df-nf 1545 df-sb 1649 df-clab 2340 df-cleq 2346 df-clel 2349 df-sbc 3048 df-csb 3138 |
This theorem is referenced by: csbvarg 3164 csbnest1g 3189 csbsng 3786 csbunig 3900 csbxpg 4814 csbrng 4967 csbresg 4977 csbfv12g 5337 |
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