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Description: Value of the ring span function. (Contributed by Stefan O'Rear, 4-Apr-2015)
| Ref | Expression | ||
|---|---|---|---|
| Assertion | rspval |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | df-rsp | ||
| 2 | 1 | fveq1i | |
| 3 | 00lsp | ||
| 4 | rlmfn | ||
| 5 | fnfun | ||
| 6 | 4 5 | ax-mp | |
| 7 | 3 6 | fvco4i | |
| 8 | 2 7 | eqtri |