Intuitionistic Logic Explorer |
< Previous
Next >
Nearby theorems |
||
Mirrors > Home > ILE Home > Th. List > sbf2 | Unicode version |
Description: Substitution has no effect on a bound variable. (Contributed by NM, 1-Jul-2005.) |
Ref | Expression |
---|---|
sbf2 |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | nfa1 1474 | . 2 | |
2 | 1 | sbf 1700 | 1 |
Colors of variables: wff set class |
Syntax hints: wb 103 wal 1282 wsb 1685 |
This theorem was proved from axioms: ax-1 5 ax-2 6 ax-mp 7 ax-ia1 104 ax-ia2 105 ax-ia3 106 ax-5 1376 ax-gen 1378 ax-ie1 1422 ax-ie2 1423 ax-4 1440 ax-i9 1463 ax-ial 1467 |
This theorem depends on definitions: df-bi 115 df-nf 1390 df-sb 1686 |
This theorem is referenced by: (None) |
Copyright terms: Public domain | W3C validator |