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| Mirrors > Home > MPE Home > Th. List > Mathboxes > 2p3e5 | Structured version Visualization version GIF version | ||
| Description: 2 + 3 = 5. (Contributed by SN, 24-Aug-2026.) |
| Ref | Expression |
|---|---|
| 2p3e5 | ⊢ (2 + 3) = 5 |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | 2cn 12335 | . . 3 ⊢ 2 ∈ ℂ | |
| 2 | ax-1cn 11177 | . . 3 ⊢ 1 ∈ ℂ | |
| 3 | 1, 2, 1 | addassi 11238 | . 2 ⊢ ((2 + 1) + 2) = (2 + (1 + 2)) |
| 4 | 2p1e3 12401 | . . . 4 ⊢ (2 + 1) = 3 | |
| 5 | 4 | oveq1i 7429 | . . 3 ⊢ ((2 + 1) + 2) = (3 + 2) |
| 6 | 3p2e5 12410 | . . 3 ⊢ (3 + 2) = 5 | |
| 7 | 5, 6 | eqtri 2788 | . 2 ⊢ ((2 + 1) + 2) = 5 |
| 8 | 1p2e3 12402 | . . 3 ⊢ (1 + 2) = 3 | |
| 9 | 8 | oveq2i 7430 | . 2 ⊢ (2 + (1 + 2)) = (2 + 3) |
| 10 | 3, 7, 9 | 3eqtr3ri 2797 | 1 ⊢ (2 + 3) = 5 |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: = wceq 1570 (class class class)co 7419 1c1 11120 + caddc 11122 2c2 12314 3c3 12315 5c5 12317 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1943 ax-6 2000 ax-7 2041 ax-8 2148 ax-9 2156 ax-ext 2737 ax-1cn 11177 ax-addcl 11179 ax-addass 11184 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-sb 2100 df-clab 2744 df-cleq 2757 df-clel 2840 df-rab 3419 df-v 3459 df-dif 3909 df-un 3911 df-ss 3923 df-nul 4287 df-if 4490 df-sn 4592 df-pr 4594 df-op 4598 df-uni 4875 df-br 5112 df-iota 6496 df-fv 6548 df-ov 7422 df-2 12322 df-3 12323 df-4 12324 df-5 12325 |
| This theorem is used by: 2p5e7 43097 3p5e8 43101 |
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