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Mirrors > Home > MPE Home > Th. List > r19.21bi | Structured version Visualization version Unicode version |
Description: Inference from Theorem 19.21 of [Margaris] p. 90. (Restricted quantifier version.) (Contributed by NM, 20-Nov-1994.) (Proof shortened by Wolf Lammen, 1-Jan-2020.) |
Ref | Expression |
---|---|
r19.21bi.1 |
Ref | Expression |
---|---|
r19.21bi |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | r19.21bi.1 | . . 3 | |
2 | rsp 2929 | . . 3 | |
3 | 1, 2 | syl 17 | . 2 |
4 | 3 | imp 445 | 1 |
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