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| Mirrors > Home > MPE Home > Th. List > Mathboxes > it1ei | Structured version Visualization version GIF version | ||
| Description: i times 1 equals i. (Contributed by SN, 25-Apr-2025.) |
| Ref | Expression |
|---|---|
| it1ei | ⊢ (i · 1) = i |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | ax-icn 11298 | . 2 ⊢ i ∈ ℂ | |
| 2 | 1 | mulridi 11352 | 1 ⊢ (i · 1) = i |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: = wceq 1570 (class class class)co 7451 1c1 11240 ici 11241 · cmul 11244 |
| 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 1945 ax-6 2002 ax-7 2043 ax-8 2149 ax-9 2157 ax-ext 2735 ax-resscn 11296 ax-1cn 11297 ax-icn 11298 ax-addcl 11299 ax-mulcl 11301 ax-mulcom 11303 ax-mulass 11305 ax-distr 11306 ax-1rid 11309 ax-cnre 11312 |
| 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 2102 df-clab 2742 df-cleq 2755 df-clel 2839 df-rex 3091 df-rab 3417 df-v 3456 df-ss 3901 df-dif 4050 df-un 4154 df-nul 4282 df-if 4486 df-sn 4589 df-pr 4591 df-op 4841 df-uni 4873 df-br 5109 df-iota 6520 df-fv 6574 df-ov 7454 |
| This theorem is used by: (None) |
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