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Mirrors > Home > MPE Home > Th. List > df-2 | Structured version Visualization version Unicode version |
Description: Define the number 2. (Contributed by NM, 27-May-1999.) |
Ref | Expression |
---|---|
df-2 |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | c2 11070 |
. 2
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2 | c1 9937 |
. . 3
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3 | caddc 9939 |
. . 3
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4 | 2, 2, 3 | co 6650 |
. 2
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5 | 1, 4 | wceq 1483 |
1
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