![]() |
Intuitionistic Logic Explorer |
< Previous
Next >
Nearby theorems |
|
Mirrors > Home > ILE Home > Th. List > niabn | Unicode version |
Description: Miscellaneous inference relating falsehoods. (Contributed by NM, 31-Mar-1994.) |
Ref | Expression |
---|---|
niabn.1 |
![]() ![]() |
Ref | Expression |
---|---|
niabn |
![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | simpr 108 |
. 2
![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() | |
2 | niabn.1 |
. . 3
![]() ![]() | |
3 | 2 | pm2.24i 588 |
. 2
![]() ![]() ![]() ![]() ![]() ![]() ![]() |
4 | 1, 3 | pm5.21ni 654 |
1
![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() |
Colors of variables: wff set class |
Syntax hints: ![]() ![]() ![]() ![]() |
This theorem was proved from axioms: ax-1 5 ax-2 6 ax-mp 7 ax-ia2 105 ax-ia3 106 ax-in1 579 ax-in2 580 |
This theorem depends on definitions: df-bi 115 |
This theorem is referenced by: ninba 918 |
Copyright terms: Public domain | W3C validator |