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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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