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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 8115 | . 2 ⊢ 1 ∈ ℂ | |
| 2 | 1 | mulridi 8171 | 1 ⊢ (1 · 1) = 1 |
| Colors of variables: wff set class |
| Syntax hints: = wceq 1395 (class class class)co 6013 1c1 8023 · cmul 8027 |
| 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 714 ax-5 1493 ax-7 1494 ax-gen 1495 ax-ie1 1539 ax-ie2 1540 ax-8 1550 ax-10 1551 ax-11 1552 ax-i12 1553 ax-bndl 1555 ax-4 1556 ax-17 1572 ax-i9 1576 ax-ial 1580 ax-i5r 1581 ax-ext 2211 ax-resscn 8114 ax-1cn 8115 ax-icn 8117 ax-addcl 8118 ax-mulcl 8120 ax-mulcom 8123 ax-mulass 8125 ax-distr 8126 ax-1rid 8129 ax-cnre 8133 |
| This theorem depends on definitions: df-bi 117 df-3an 1004 df-tru 1398 df-nf 1507 df-sb 1809 df-clab 2216 df-cleq 2222 df-clel 2225 df-nfc 2361 df-ral 2513 df-rex 2514 df-v 2802 df-un 3202 df-in 3204 df-ss 3211 df-sn 3673 df-pr 3674 df-op 3676 df-uni 3892 df-br 4087 df-iota 5284 df-fv 5332 df-ov 6016 |
| This theorem is referenced by: neg1mulneg1e1 9346 addltmul 9371 1exp 10820 expge1 10828 mulexp 10830 mulexpzap 10831 expaddzap 10835 m1expeven 10838 i4 10894 facp1 10982 binom 12035 prodf1 12093 prodfrecap 12097 fprodmul 12142 fprodrec 12180 fprodge1 12190 rpmul 12660 dvexp 15425 dvef 15441 lgslem3 15721 lgsval2lem 15729 lgsneg 15743 lgsdilem 15746 lgsdir 15754 lgsdi 15756 lgsquad2lem1 15800 lgsquad2lem2 15801 |
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