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| Mirrors > Home > ILE Home > Th. List > 1p2e3 | GIF version | ||
| Description: 1 + 2 = 3 (common case). (Contributed by David A. Wheeler, 8-Dec-2018.) |
| Ref | Expression |
|---|---|
| 1p2e3 | ⊢ (1 + 2) = 3 |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | 2cn 9354 | . 2 ⊢ 2 ∈ ℂ | |
| 2 | ax-1cn 8262 | . 2 ⊢ 1 ∈ ℂ | |
| 3 | 2p1e3 9417 | . 2 ⊢ (2 + 1) = 3 | |
| 4 | 1, 2, 3 | addcomli 8461 | 1 ⊢ (1 + 2) = 3 |
| Colors of variables: wff set class |
| Syntax hints: = wceq 1402 (class class class)co 6075 1c1 8170 + caddc 8172 2c2 9334 3c3 9335 |
| 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 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 8261 ax-1cn 8262 ax-1re 8263 ax-addrcl 8266 ax-addcom 8269 |
| This theorem 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 9342 df-3 9343 |
| This theorem is referenced by: binom3 11072 3lcm2e6woprm 12842 2exp16 13194 1kp2ke3k 16652 |
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