Description: Equivalence of a double universal quantification restricted to the range and an "at most one" inside a universal quantification. (Contributed by Peter Mazsa, 4-Sep-2021)
Ref | Expression | ||
---|---|---|---|
Assertion | ineccnvmo2 |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | ineccnvmo | ||
2 | alrmomorn | ||
3 | 1 2 | bitri |