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Mirrors > Home > ILE Home > Th. List > r19.21bi | Unicode version |
Description: Inference from Theorem 19.21 of [Margaris] p. 90. (Restricted quantifier version.) (Contributed by NM, 20-Nov-1994.) |
Ref | Expression |
---|---|
r19.21bi.1 |
Ref | Expression |
---|---|
r19.21bi |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | r19.21bi.1 | . . . 4 | |
2 | df-ral 2447 | . . . 4 | |
3 | 1, 2 | sylib 121 | . . 3 |
4 | 3 | 19.21bi 1545 | . 2 |
5 | 4 | imp 123 | 1 |
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