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| Mirrors > Home > MPE Home > Th. List > necon3bid | Structured version Visualization version Unicode version | ||
| Description: Deduction from equality to inequality. (Contributed by NM, 23-Feb-2005.) (Proof shortened by Andrew Salmon, 25-May-2011.) |
| Ref | Expression |
|---|---|
| necon3bid.1 |
|
| Ref | Expression |
|---|---|
| necon3bid |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | df-ne 2795 |
. 2
| |
| 2 | necon3bid.1 |
. . 3
| |
| 3 | 2 | necon3bbid 2831 |
. 2
|
| 4 | 1, 3 | syl5bb 272 |
1
|
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