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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 8110 |
. 2
| |
| 2 | ax-1cn 7069 |
. 2
| |
| 3 | 2p1e3 8165 |
. 2
| |
| 4 | 1, 2, 3 | addcomli 7253 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem was proved from axioms: ax-1 5 ax-2 6 ax-mp 7 ax-ia1 104 ax-ia2 105 ax-ia3 106 ax-5 1376 ax-7 1377 ax-gen 1378 ax-ie1 1422 ax-ie2 1423 ax-8 1435 ax-11 1437 ax-4 1440 ax-17 1459 ax-i9 1463 ax-ial 1467 ax-i5r 1468 ax-ext 2063 ax-resscn 7068 ax-1cn 7069 ax-1re 7070 ax-addrcl 7073 ax-addcom 7076 |
| This theorem depends on definitions: df-bi 115 df-nf 1390 df-sb 1686 df-clab 2068 df-cleq 2074 df-clel 2077 df-in 2979 df-ss 2986 df-2 8098 df-3 8099 |
| This theorem is referenced by: binom3 9590 3lcm2e6woprm 10468 1kp2ke3k 10562 |
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