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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 8220 | . 2 ⊢ 1 ∈ ℂ | |
| 2 | 1 | mulridi 8276 | 1 ⊢ (1 · 1) = 1 |
| Colors of variables: wff set class |
| Syntax hints: = wceq 1398 (class class class)co 6050 1c1 8128 · cmul 8132 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-io 717 ax-5 1496 ax-7 1497 ax-gen 1498 ax-ie1 1542 ax-ie2 1543 ax-8 1553 ax-10 1554 ax-11 1555 ax-i12 1556 ax-bndl 1558 ax-4 1559 ax-17 1575 ax-i9 1579 ax-ial 1583 ax-i5r 1584 ax-ext 2214 ax-resscn 8219 ax-1cn 8220 ax-icn 8222 ax-addcl 8223 ax-mulcl 8225 ax-mulcom 8228 ax-mulass 8230 ax-distr 8231 ax-1rid 8234 ax-cnre 8238 |
| This theorem depends on definitions: df-bi 117 df-3an 1007 df-tru 1401 df-nf 1510 df-sb 1812 df-clab 2219 df-cleq 2225 df-clel 2228 df-nfc 2373 df-ral 2525 df-rex 2526 df-v 2815 df-un 3215 df-in 3217 df-ss 3224 df-sn 3695 df-pr 3696 df-op 3698 df-uni 3915 df-br 4110 df-iota 5312 df-fv 5360 df-ov 6053 |
| This theorem is referenced by: neg1mulneg1e1 9450 addltmul 9475 1exp 10930 expge1 10938 mulexp 10940 mulexpzap 10941 expaddzap 10945 m1expeven 10948 i4 11004 facp1 11092 binom 12170 prodf1 12228 prodfrecap 12232 fprodmul 12277 fprodrec 12315 fprodge1 12325 rpmul 12795 dvexp 15576 dvef 15592 lgslem3 15875 lgsval2lem 15883 lgsneg 15897 lgsdilem 15900 lgsdir 15908 lgsdi 15910 lgsquad2lem1 15954 lgsquad2lem2 15955 |
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