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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 8237 | . 2 ⊢ 1 ∈ ℂ | |
| 2 | 1 | mulridi 8293 | 1 ⊢ (1 · 1) = 1 |
| Colors of variables: wff set class |
| Syntax hints: = wceq 1398 (class class class)co 6059 1c1 8145 · cmul 8149 |
| 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 2216 ax-resscn 8236 ax-1cn 8237 ax-icn 8239 ax-addcl 8240 ax-mulcl 8242 ax-mulcom 8245 ax-mulass 8247 ax-distr 8248 ax-1rid 8251 ax-cnre 8255 |
| This theorem depends on definitions: df-bi 117 df-3an 1007 df-tru 1401 df-nf 1510 df-sb 1812 df-clab 2221 df-cleq 2227 df-clel 2230 df-nfc 2375 df-ral 2527 df-rex 2528 df-v 2817 df-un 3218 df-in 3220 df-ss 3227 df-sn 3701 df-pr 3702 df-op 3704 df-uni 3921 df-br 4116 df-iota 5318 df-fv 5366 df-ov 6062 |
| This theorem is referenced by: neg1mulneg1e1 9471 addltmul 9496 1exp 10958 expge1 10966 mulexp 10968 mulexpzap 10969 expaddzap 10973 m1expeven 10976 i4 11032 facp1 11121 binom 12200 prodf1 12258 prodfrecap 12262 fprodmul 12307 fprodrec 12345 fprodge1 12355 rpmul 12825 dvexp 15707 dvef 15723 lgslem3 16006 lgsval2lem 16014 lgsneg 16028 lgsdilem 16031 lgsdir 16039 lgsdi 16041 lgsquad2lem1 16085 lgsquad2lem2 16086 |
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