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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 11177 | . 2 ⊢ i ∈ ℂ | |
| 2 | 1 | mulridi 11231 | 1 ⊢ (i · 1) = i |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: = wceq 1570 (class class class)co 7423 1c1 11119 ici 11120 · cmul 11123 |
| 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 2738 ax-resscn 11175 ax-1cn 11176 ax-icn 11177 ax-addcl 11178 ax-mulcl 11180 ax-mulcom 11182 ax-mulass 11184 ax-distr 11185 ax-1rid 11188 ax-cnre 11191 |
| 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 2745 df-cleq 2758 df-clel 2841 df-rex 3093 df-rab 3420 df-v 3460 df-dif 3911 df-un 3913 df-ss 3925 df-nul 4290 df-if 4493 df-sn 4595 df-pr 4597 df-op 4601 df-uni 4878 df-br 5115 df-iota 6499 df-fv 6551 df-ov 7426 |
| This theorem is used by: (None) |
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