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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 8103 | . 2 ⊢ 1 ∈ ℂ | |
| 2 | 1 | mulridi 8159 | 1 ⊢ (1 · 1) = 1 |
| Colors of variables: wff set class |
| Syntax hints: = wceq 1395 (class class class)co 6007 1c1 8011 · cmul 8015 |
| 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 8102 ax-1cn 8103 ax-icn 8105 ax-addcl 8106 ax-mulcl 8108 ax-mulcom 8111 ax-mulass 8113 ax-distr 8114 ax-1rid 8117 ax-cnre 8121 |
| 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 2801 df-un 3201 df-in 3203 df-ss 3210 df-sn 3672 df-pr 3673 df-op 3675 df-uni 3889 df-br 4084 df-iota 5278 df-fv 5326 df-ov 6010 |
| This theorem is referenced by: neg1mulneg1e1 9334 addltmul 9359 1exp 10802 expge1 10810 mulexp 10812 mulexpzap 10813 expaddzap 10817 m1expeven 10820 i4 10876 facp1 10964 binom 12010 prodf1 12068 prodfrecap 12072 fprodmul 12117 fprodrec 12155 fprodge1 12165 rpmul 12635 dvexp 15400 dvef 15416 lgslem3 15696 lgsval2lem 15704 lgsneg 15718 lgsdilem 15721 lgsdir 15729 lgsdi 15731 lgsquad2lem1 15775 lgsquad2lem2 15776 |
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