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Description: Equality theorem for the range Cartesian product, deduction form. (Contributed by Peter Mazsa, 7-Sep-2021)
| Ref | Expression | ||
|---|---|---|---|
| Hypothesis | xrneq1d.1 | ||
| Assertion | xrneq1d |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | xrneq1d.1 | ||
| 2 | xrneq1 | ||
| 3 | 1 2 | syl |