| Intuitionistic Logic Explorer | 
      
      
      < Previous  
      Next >
      
       Nearby theorems  | 
  ||
| Mirrors > Home > ILE Home > Th. List > anbi2d | Unicode version | ||
| Description: Deduction adding a left conjunct to both sides of a logical equivalence. (Contributed by NM, 5-Aug-1993.) (Proof shortened by Wolf Lammen, 16-Nov-2013.) | 
| Ref | Expression | 
|---|---|
| anbid.1 | 
 | 
| Ref | Expression | 
|---|---|
| anbi2d | 
 | 
| Step | Hyp | Ref | Expression | 
|---|---|---|---|
| 1 | anbid.1 | 
. . 3
 | |
| 2 | 1 | a1d 22 | 
. 2
 | 
| 3 | 2 | pm5.32d 450 | 
1
 | 
| Copyright terms: Public domain | W3C validator |