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Mirrors > Home > ILE Home > Th. List > csbco | Unicode version |
Description: Composition law for
chained substitutions into a class.
Use the weaker csbcow 3083 when possible. (Contributed by NM, 10-Nov-2005.) (New usage is discouraged.) |
Ref | Expression |
---|---|
csbco |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | df-csb 3073 |
. . . . . 6
![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() | |
2 | 1 | abeq2i 2300 |
. . . . 5
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3 | 2 | sbcbii 3037 |
. . . 4
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4 | sbcco 2999 |
. . . 4
![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() | |
5 | 3, 4 | bitri 184 |
. . 3
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6 | 5 | abbii 2305 |
. 2
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7 | df-csb 3073 |
. 2
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8 | df-csb 3073 |
. 2
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9 | 6, 7, 8 | 3eqtr4i 2220 |
1
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Colors of variables: wff set class |
Syntax hints: ![]() ![]() ![]() ![]() ![]() |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-io 710 ax-5 1458 ax-7 1459 ax-gen 1460 ax-ie1 1504 ax-ie2 1505 ax-8 1515 ax-10 1516 ax-11 1517 ax-i12 1518 ax-bndl 1520 ax-4 1521 ax-17 1537 ax-i9 1541 ax-ial 1545 ax-i5r 1546 ax-ext 2171 |
This theorem depends on definitions: df-bi 117 df-tru 1367 df-nf 1472 df-sb 1774 df-clab 2176 df-cleq 2182 df-clel 2185 df-nfc 2321 df-v 2754 df-sbc 2978 df-csb 3073 |
This theorem is referenced by: csbvarg 3100 csbnest1g 3127 zsumdc 11433 fsum3 11436 fsumsplitf 11457 |
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