| Intuitionistic Logic Explorer |
< Previous
Next >
Nearby theorems |
||
| Mirrors > Home > ILE Home > Th. List > 2t2e4 | GIF version | ||
| Description: 2 times 2 equals 4. (Contributed by NM, 1-Aug-1999.) |
| Ref | Expression |
|---|---|
| 2t2e4 | ⊢ (2 · 2) = 4 |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | 2cn 9256 | . . 3 ⊢ 2 ∈ ℂ | |
| 2 | 1 | 2timesi 9315 | . 2 ⊢ (2 · 2) = (2 + 2) |
| 3 | 2p2e4 9312 | . 2 ⊢ (2 + 2) = 4 | |
| 4 | 2, 3 | eqtri 2252 | 1 ⊢ (2 · 2) = 4 |
| Colors of variables: wff set class |
| Syntax hints: = wceq 1398 (class class class)co 6028 + caddc 8078 · cmul 8080 2c2 9236 4c4 9238 |
| 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 2213 ax-resscn 8167 ax-1cn 8168 ax-1re 8169 ax-icn 8170 ax-addcl 8171 ax-addrcl 8172 ax-mulcl 8173 ax-mulcom 8176 ax-addass 8177 ax-mulass 8178 ax-distr 8179 ax-1rid 8182 ax-cnre 8186 |
| This theorem depends on definitions: df-bi 117 df-3an 1007 df-tru 1401 df-nf 1510 df-sb 1811 df-clab 2218 df-cleq 2224 df-clel 2227 df-nfc 2364 df-ral 2516 df-rex 2517 df-v 2805 df-un 3205 df-in 3207 df-ss 3214 df-sn 3679 df-pr 3680 df-op 3682 df-uni 3899 df-br 4094 df-iota 5293 df-fv 5341 df-ov 6031 df-2 9244 df-3 9245 df-4 9246 |
| This theorem is referenced by: 4d2e2 9346 halfpm6th 9406 div4p1lem1div2 9440 3halfnz 9621 decbin0 9794 fldiv4lem1div2uz2 10612 sq2 10943 sq4e2t8 10945 sqoddm1div8 11001 faclbnd2 11050 4bc2eq6 11082 amgm2 11741 sin4lt0 12391 z4even 12540 flodddiv4 12560 flodddiv4t2lthalf 12563 4nprm 12764 2exp4 13067 2exp16 13073 dveflem 15520 sin0pilem2 15576 sinhalfpilem 15585 sincosq1lem 15619 tangtx 15632 sincos4thpi 15634 gausslemma2dlem3 15865 m1lgs 15887 2lgslem1a2 15889 2lgslem3a 15895 2lgslem3b 15896 2lgslem3c 15897 2lgslem3d 15898 ex-fl 16422 |
| Copyright terms: Public domain | W3C validator |