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Mirrors > Home > MPE Home > Th. List > 2m1e1 | Structured version Visualization version Unicode version |
Description: 2 - 1 = 1. The result is on the right-hand-side to be consistent with similar proofs like 4p4e8 10775. (Contributed by David A. Wheeler, 4-Jan-2017.) |
Ref | Expression |
---|---|
2m1e1 |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | 2cn 10708 |
. 2
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2 | ax-1cn 9623 |
. 2
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3 | 1p1e2 10751 |
. 2
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4 | 1, 2, 2, 3 | subaddrii 9990 |
1
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