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Mirrors > Home > NFE Home > Th. List > mo3 | Unicode version |
Description: Alternate definition of "at most one." Definition of [BellMachover] p. 460, except that definition has the side condition that not occur in in place of our hypothesis. (Contributed by NM, 8-Mar-1995.) |
Ref | Expression |
---|---|
mo3.1 |
Ref | Expression |
---|---|
mo3 |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | mo3.1 | . . 3 | |
2 | 1 | mo2 2233 | . 2 |
3 | 1 | mo 2226 | . 2 |
4 | 2, 3 | bitri 240 | 1 |
Colors of variables: wff setvar class |
Syntax hints: wi 4 wb 176 wa 358 wal 1540 wex 1541 wnf 1544 wsb 1648 wmo 2205 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1546 ax-5 1557 ax-17 1616 ax-9 1654 ax-8 1675 ax-6 1729 ax-7 1734 ax-11 1746 ax-12 1925 |
This theorem depends on definitions: df-bi 177 df-or 359 df-an 360 df-tru 1319 df-ex 1542 df-nf 1545 df-sb 1649 df-eu 2208 df-mo 2209 |
This theorem is referenced by: mo4f 2236 mopick 2266 rmo3 3133 |
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