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| Mirrors > Home > ILE Home > Th. List > 1t1e1 | GIF version | ||
| Description: 1 times 1 equals 1. (Contributed by David A. Wheeler, 7-Jul-2016.) |
| Ref | Expression |
|---|---|
| 1t1e1 | ⊢ (1 · 1) = 1 |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | ax-1cn 8272 | . 2 ⊢ 1 ∈ ℂ | |
| 2 | 1 | mulridi 8328 | 1 ⊢ (1 · 1) = 1 |
| Colors of variables: wff set class |
| This proof depends on syntax axioms: = wceq 1402 (class class class)co 6085 1c1 8180 · cmul 8184 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-io 721 ax-5 1500 ax-7 1501 ax-gen 1502 ax-ie1 1546 ax-ie2 1547 ax-8 1557 ax-10 1558 ax-11 1559 ax-i12 1560 ax-bndl 1562 ax-4 1563 ax-17 1579 ax-i9 1583 ax-ial 1587 ax-i5r 1588 ax-ext 2220 ax-resscn 8271 ax-1cn 8272 ax-icn 8274 ax-addcl 8275 ax-mulcl 8277 ax-mulcom 8280 ax-mulass 8282 ax-distr 8283 ax-1rid 8286 ax-cnre 8290 |
| This proof depends on definitions: df-bi 117 df-3an 1011 df-tru 1405 df-nf 1514 df-sb 1816 df-clab 2225 df-cleq 2231 df-clel 2234 df-nfc 2381 df-ral 2533 df-rex 2534 df-v 2823 df-un 3224 df-in 3226 df-ss 3233 df-sn 3715 df-pr 3716 df-op 3718 df-uni 3936 df-br 4131 df-iota 5337 df-fv 5385 df-ov 6088 |
| This theorem is used by: neg1mulneg1e1 9517 addltmul 9542 1exp 11005 expge1 11013 mulexp 11015 mulexpzap 11016 expaddzap 11020 m1expeven 11023 i4 11079 facp1 11168 hashf1 11287 binom 12251 prodf1 12309 prodfrecap 12313 fprodmul 12358 fprodrec 12396 fprodge1 12406 rpmul 12876 dvexp 15812 dvef 15828 lgslem3 16121 lgsval2lem 16129 lgsneg 16143 lgsdilem 16146 lgsdir 16154 lgsdi 16156 lgsquad2lem1 16200 lgsquad2lem2 16201 |
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