![]() |
New Foundations Explorer |
< Previous
Next >
Nearby theorems |
|
Mirrors > Home > NFE Home > Th. List > olcd | Unicode version |
Description: Deduction introducing a
disjunct. A translation of natural deduction
rule ![]() ![]() |
Ref | Expression |
---|---|
orcd.1 |
![]() ![]() ![]() ![]() ![]() ![]() |
Ref | Expression |
---|---|
olcd |
![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | orcd.1 |
. . 3
![]() ![]() ![]() ![]() ![]() ![]() | |
2 | 1 | orcd 381 |
. 2
![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() |
3 | 2 | orcomd 377 |
1
![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() |
Colors of variables: wff setvar class |
Syntax hints: ![]() ![]() |
This theorem was proved from axioms: ax-1 5 ax-2 6 ax-3 7 ax-mp 8 |
This theorem depends on definitions: df-bi 177 df-or 359 |
This theorem is referenced by: pm2.48 389 pm2.49 390 orim12i 502 pm1.5 508 nnc0suc 4412 clos1basesuc 5882 nc0le1 6216 frecsuc 6322 |
Copyright terms: Public domain | W3C validator |