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Mirrors > Home > MPE Home > Th. List > 1p1e2apr1 | Structured version Visualization version Unicode version |
Description: One plus one equals two. Using proof-shortening techniques pioneered by Mr. Mel L. O'Cat, along with the latest supercomputer technology, Prof. Loof Lirpa and colleagues were able to shorten Whitehead and Russell's 360-page proof that 1+1=2 in Principia Mathematica to this remarkable proof only two steps long, thus establishing a new world's record for this famous theorem. (Contributed by Prof. Loof Lirpa, 1-Apr-2008.) (Proof modification is discouraged.) (New usage is discouraged.) |
Ref | Expression |
---|---|
1p1e2apr1 |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | df-2 11079 | . 2 | |
2 | 1 | eqcomi 2631 | 1 |
Colors of variables: wff setvar class |
Syntax hints: wceq 1483 (class class class)co 6650 c1 9937 caddc 9939 c2 11070 |
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-9 1999 ax-ext 2602 |
This theorem depends on definitions: df-bi 197 df-an 386 df-ex 1705 df-cleq 2615 df-2 11079 |
This theorem is referenced by: (None) |
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