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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 8236 | . 2 ⊢ 1 ∈ ℂ | |
| 2 | 1 | mulridi 8292 | 1 ⊢ (1 · 1) = 1 |
| Colors of variables: wff set class |
| Syntax hints: = wceq 1398 (class class class)co 6058 1c1 8144 · cmul 8148 |
| 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 8235 ax-1cn 8236 ax-icn 8238 ax-addcl 8239 ax-mulcl 8241 ax-mulcom 8244 ax-mulass 8246 ax-distr 8247 ax-1rid 8250 ax-cnre 8254 |
| 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 3700 df-pr 3701 df-op 3703 df-uni 3920 df-br 4115 df-iota 5317 df-fv 5365 df-ov 6061 |
| This theorem is referenced by: neg1mulneg1e1 9467 addltmul 9492 1exp 10954 expge1 10962 mulexp 10964 mulexpzap 10965 expaddzap 10969 m1expeven 10972 i4 11028 facp1 11117 binom 12195 prodf1 12253 prodfrecap 12257 fprodmul 12302 fprodrec 12340 fprodge1 12350 rpmul 12820 dvexp 15702 dvef 15718 lgslem3 16001 lgsval2lem 16009 lgsneg 16023 lgsdilem 16026 lgsdir 16034 lgsdi 16036 lgsquad2lem1 16080 lgsquad2lem2 16081 |
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