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| Mirrors > Home > ILE Home > Th. List > oveq12d | Unicode version | ||
| Description: Equality deduction for operation value. (Contributed by NM, 13-Mar-1995.) (Proof shortened by Andrew Salmon, 22-Oct-2011.) |
| Ref | Expression |
|---|---|
| oveq1d.1 |
|
| oveq12d.2 |
|
| Ref | Expression |
|---|---|
| oveq12d |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | oveq1d.1 |
. 2
| |
| 2 | oveq12d.2 |
. 2
| |
| 3 | oveq12 5931 |
. 2
| |
| 4 | 1, 2, 3 | syl2anc 411 |
1
|
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