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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 8278 | . 2 ⊢ 1 ∈ ℂ | |
| 2 | 1 | mulridi 8334 | 1 ⊢ (1 · 1) = 1 |
| Colors of variables: wff set class |
| This proof depends on syntax axioms: = wceq 1402 (class class class)co 6088 1c1 8186 · cmul 8190 |
| 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 8277 ax-1cn 8278 ax-icn 8280 ax-addcl 8281 ax-mulcl 8283 ax-mulcom 8286 ax-mulass 8288 ax-distr 8289 ax-1rid 8292 ax-cnre 8296 |
| 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 4132 df-iota 5340 df-fv 5388 df-ov 6091 |
| This theorem is used by: neg1mulneg1e1 9528 addltmul 9553 1exp 11026 expge1 11034 mulexp 11036 mulexpzap 11037 expaddzap 11041 m1expeven 11044 i4 11100 facp1 11190 hashf1 11309 binom 12276 prodf1 12334 prodfrecap 12338 fprodmul 12383 fprodrec 12421 fprodge1 12431 rpmul 12901 dvexp 15937 dvef 15953 lgslem3 16326 lgsval2lem 16334 lgsneg 16348 lgsdilem 16351 lgsdir 16359 lgsdi 16361 lgsquad2lem1 16405 lgsquad2lem2 16406 |
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