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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 8125 | . 2 ⊢ 1 ∈ ℂ | |
| 2 | 1 | mulridi 8181 | 1 ⊢ (1 · 1) = 1 |
| Colors of variables: wff set class |
| Syntax hints: = wceq 1397 (class class class)co 6018 1c1 8033 · cmul 8037 |
| 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 716 ax-5 1495 ax-7 1496 ax-gen 1497 ax-ie1 1541 ax-ie2 1542 ax-8 1552 ax-10 1553 ax-11 1554 ax-i12 1555 ax-bndl 1557 ax-4 1558 ax-17 1574 ax-i9 1578 ax-ial 1582 ax-i5r 1583 ax-ext 2213 ax-resscn 8124 ax-1cn 8125 ax-icn 8127 ax-addcl 8128 ax-mulcl 8130 ax-mulcom 8133 ax-mulass 8135 ax-distr 8136 ax-1rid 8139 ax-cnre 8143 |
| This theorem depends on definitions: df-bi 117 df-3an 1006 df-tru 1400 df-nf 1509 df-sb 1811 df-clab 2218 df-cleq 2224 df-clel 2227 df-nfc 2363 df-ral 2515 df-rex 2516 df-v 2804 df-un 3204 df-in 3206 df-ss 3213 df-sn 3675 df-pr 3676 df-op 3678 df-uni 3894 df-br 4089 df-iota 5286 df-fv 5334 df-ov 6021 |
| This theorem is referenced by: neg1mulneg1e1 9356 addltmul 9381 1exp 10831 expge1 10839 mulexp 10841 mulexpzap 10842 expaddzap 10846 m1expeven 10849 i4 10905 facp1 10993 binom 12063 prodf1 12121 prodfrecap 12125 fprodmul 12170 fprodrec 12208 fprodge1 12218 rpmul 12688 dvexp 15454 dvef 15470 lgslem3 15750 lgsval2lem 15758 lgsneg 15772 lgsdilem 15775 lgsdir 15783 lgsdi 15785 lgsquad2lem1 15829 lgsquad2lem2 15830 |
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