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Mirrors > Home > ILE Home > Th. List > 19.21-2 | Unicode version |
Description: Theorem 19.21 of [Margaris] p. 90 but with 2 quantifiers. (Contributed by NM, 4-Feb-2005.) |
Ref | Expression |
---|---|
19.21-2.1 | |
19.21-2.2 |
Ref | Expression |
---|---|
19.21-2 |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | 19.21-2.2 | . . . 4 | |
2 | 1 | 19.21 1563 | . . 3 |
3 | 2 | albii 1450 | . 2 |
4 | 19.21-2.1 | . . 3 | |
5 | 4 | 19.21 1563 | . 2 |
6 | 3, 5 | bitri 183 | 1 |
Colors of variables: wff set class |
Syntax hints: wi 4 wb 104 wal 1333 wnf 1440 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 ax-5 1427 ax-gen 1429 ax-4 1490 ax-ial 1514 ax-i5r 1515 |
This theorem depends on definitions: df-bi 116 df-nf 1441 |
This theorem is referenced by: (None) |
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