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Mirrors > Home > MPE Home > Th. List > dral2 | Structured version Visualization version Unicode version |
Description: Formula-building lemma for use with the Distinctor Reduction Theorem. Part of Theorem 9.4 of [Megill] p. 448 (p. 16 of preprint). (Contributed by NM, 27-Feb-2005.) Allow a shortening of dral1 2325. (Revised by Wolf Lammen, 4-Mar-2018.) |
Ref | Expression |
---|---|
dral1.1 |
Ref | Expression |
---|---|
dral2 |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | nfae 2316 | . 2 | |
2 | dral1.1 | . 2 | |
3 | 1, 2 | albid 2090 | 1 |
Colors of variables: wff setvar class |
Syntax hints: wi 4 wb 196 wal 1481 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1722 ax-4 1737 ax-5 1839 ax-6 1888 ax-7 1935 ax-10 2019 ax-11 2034 ax-12 2047 ax-13 2246 |
This theorem depends on definitions: df-bi 197 df-or 385 df-an 386 df-tru 1486 df-ex 1705 df-nf 1710 |
This theorem is referenced by: dral1ALT 2326 sbal1 2460 sbal2 2461 drnfc1 2782 drnfc2 2783 axpownd 9423 wl-sbalnae 33345 |
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