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| Mirrors > Home > ILE Home > Th. List > 1p2e3 | Unicode version | ||
| Description: 1 + 2 = 3 (common case). (Contributed by David A. Wheeler, 8-Dec-2018.) |
| Ref | Expression |
|---|---|
| 1p2e3 |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | 2cn 9142 |
. 2
| |
| 2 | ax-1cn 8053 |
. 2
| |
| 3 | 2p1e3 9205 |
. 2
| |
| 4 | 1, 2, 3 | addcomli 8252 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-5 1471 ax-7 1472 ax-gen 1473 ax-ie1 1517 ax-ie2 1518 ax-8 1528 ax-11 1530 ax-4 1534 ax-17 1550 ax-i9 1554 ax-ial 1558 ax-i5r 1559 ax-ext 2189 ax-resscn 8052 ax-1cn 8053 ax-1re 8054 ax-addrcl 8057 ax-addcom 8060 |
| This theorem depends on definitions: df-bi 117 df-nf 1485 df-sb 1787 df-clab 2194 df-cleq 2200 df-clel 2203 df-in 3180 df-ss 3187 df-2 9130 df-3 9131 |
| This theorem is referenced by: binom3 10839 3lcm2e6woprm 12523 2exp16 12875 1kp2ke3k 15860 |
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