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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 8168 | . 2 ⊢ 1 ∈ ℂ | |
| 2 | 1 | mulridi 8224 | 1 ⊢ (1 · 1) = 1 |
| Colors of variables: wff set class |
| Syntax hints: = wceq 1398 (class class class)co 6028 1c1 8076 · cmul 8080 |
| 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 2213 ax-resscn 8167 ax-1cn 8168 ax-icn 8170 ax-addcl 8171 ax-mulcl 8173 ax-mulcom 8176 ax-mulass 8178 ax-distr 8179 ax-1rid 8182 ax-cnre 8186 |
| This theorem depends on definitions: df-bi 117 df-3an 1007 df-tru 1401 df-nf 1510 df-sb 1811 df-clab 2218 df-cleq 2224 df-clel 2227 df-nfc 2364 df-ral 2516 df-rex 2517 df-v 2805 df-un 3205 df-in 3207 df-ss 3214 df-sn 3679 df-pr 3680 df-op 3682 df-uni 3899 df-br 4094 df-iota 5293 df-fv 5341 df-ov 6031 |
| This theorem is referenced by: neg1mulneg1e1 9398 addltmul 9423 1exp 10876 expge1 10884 mulexp 10886 mulexpzap 10887 expaddzap 10891 m1expeven 10894 i4 10950 facp1 11038 binom 12108 prodf1 12166 prodfrecap 12170 fprodmul 12215 fprodrec 12253 fprodge1 12263 rpmul 12733 dvexp 15505 dvef 15521 lgslem3 15804 lgsval2lem 15812 lgsneg 15826 lgsdilem 15829 lgsdir 15837 lgsdi 15839 lgsquad2lem1 15883 lgsquad2lem2 15884 |
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