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Mirrors > Home > ILE Home > Th. List > sbc19.21g | Unicode version |
Description: Substitution for a variable not free in antecedent affects only the consequent. (Contributed by NM, 11-Oct-2004.) |
Ref | Expression |
---|---|
sbcgf.1 |
Ref | Expression |
---|---|
sbc19.21g |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | sbcimg 2996 | . 2 | |
2 | sbcgf.1 | . . . 4 | |
3 | 2 | sbcgf 3022 | . . 3 |
4 | 3 | imbi1d 230 | . 2 |
5 | 1, 4 | bitrd 187 | 1 |
Colors of variables: wff set class |
Syntax hints: wi 4 wb 104 wnf 1453 wcel 2141 wsbc 2955 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 ax-io 704 ax-5 1440 ax-7 1441 ax-gen 1442 ax-ie1 1486 ax-ie2 1487 ax-8 1497 ax-10 1498 ax-11 1499 ax-i12 1500 ax-bndl 1502 ax-4 1503 ax-17 1519 ax-i9 1523 ax-ial 1527 ax-i5r 1528 ax-ext 2152 |
This theorem depends on definitions: df-bi 116 df-tru 1351 df-nf 1454 df-sb 1756 df-clab 2157 df-cleq 2163 df-clel 2166 df-nfc 2301 df-v 2732 df-sbc 2956 |
This theorem is referenced by: (None) |
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