| Intuitionistic Logic Explorer |
< Previous
Next >
Nearby theorems |
||
| Mirrors > Home > ILE Home > Th. List > 3eqtr3d | Unicode version | ||
| Description: A deduction from three chained equalities. (Contributed by NM, 4-Aug-1995.) (Proof shortened by Andrew Salmon, 25-May-2011.) |
| Ref | Expression |
|---|---|
| 3eqtr3d.1 |
|
| 3eqtr3d.2 |
|
| 3eqtr3d.3 |
|
| Ref | Expression |
|---|---|
| 3eqtr3d |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | 3eqtr3d.1 |
. . 3
| |
| 2 | 3eqtr3d.2 |
. . 3
| |
| 3 | 1, 2 | eqtr3d 2231 |
. 2
|
| 4 | 3eqtr3d.3 |
. 2
| |
| 5 | 3, 4 | eqtr3d 2231 |
1
|
| Copyright terms: Public domain | W3C validator |