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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 8124 | . 2 ⊢ 1 ∈ ℂ | |
| 2 | 1 | mulridi 8180 | 1 ⊢ (1 · 1) = 1 |
| Colors of variables: wff set class |
| Syntax hints: = wceq 1397 (class class class)co 6017 1c1 8032 · cmul 8036 |
| 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 8123 ax-1cn 8124 ax-icn 8126 ax-addcl 8127 ax-mulcl 8129 ax-mulcom 8132 ax-mulass 8134 ax-distr 8135 ax-1rid 8138 ax-cnre 8142 |
| 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 6020 |
| This theorem is referenced by: neg1mulneg1e1 9355 addltmul 9380 1exp 10829 expge1 10837 mulexp 10839 mulexpzap 10840 expaddzap 10844 m1expeven 10847 i4 10903 facp1 10991 binom 12044 prodf1 12102 prodfrecap 12106 fprodmul 12151 fprodrec 12189 fprodge1 12199 rpmul 12669 dvexp 15434 dvef 15450 lgslem3 15730 lgsval2lem 15738 lgsneg 15752 lgsdilem 15755 lgsdir 15763 lgsdi 15765 lgsquad2lem1 15809 lgsquad2lem2 15810 |
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