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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 9377 |
. 2
| |
| 2 | ax-1cn 8272 |
. 2
| |
| 3 | 2p1e3 9440 |
. 2
| |
| 4 | 1, 2, 3 | addcomli 8472 |
1
|
| Colors of variables: wff set class |
| This proof depends on syntax axioms:
|
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-5 1500 ax-7 1501 ax-gen 1502 ax-ie1 1546 ax-ie2 1547 ax-8 1557 ax-11 1559 ax-4 1563 ax-17 1579 ax-i9 1583 ax-ial 1587 ax-i5r 1588 ax-ext 2220 ax-resscn 8271 ax-1cn 8272 ax-1re 8273 ax-addrcl 8276 ax-addcom 8279 |
| This proof depends on definitions: df-bi 117 df-nf 1514 df-sb 1816 df-clab 2225 df-cleq 2231 df-clel 2234 df-in 3226 df-ss 3233 df-2 9365 df-3 9366 |
| This theorem is used by: binom3 11107 3lcm2e6woprm 12880 2exp16 13237 prmlem1a 13241 23prm 13253 prmlem2 13254 83prm 13257 139prm 13258 163prm 13259 317prm 13260 631prm 13261 1259lem4 13265 1259prm 13267 log2ublem3 16142 log2ublog2 16143 1kp2ke3k 16836 |
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