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| Mirrors > Home > MPE Home > Th. List > 2t2e4 | Structured version Visualization version 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 12458 | . . 3 ⊢ 2 ∈ ℂ | |
| 2 | 1 | 2timesi 12520 | . 2 ⊢ (2 · 2) = (2 + 2) |
| 3 | 2p2e4 12517 | . 2 ⊢ (2 + 2) = 4 | |
| 4 | 2, 3 | eqtri 2786 | 1 ⊢ (2 · 2) = 4 |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: = wceq 1570 (class class class)co 7451 + caddc 11242 · cmul 11244 2c2 12437 4c4 12439 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1945 ax-6 2002 ax-7 2043 ax-8 2149 ax-9 2157 ax-ext 2735 ax-resscn 11296 ax-1cn 11297 ax-icn 11298 ax-addcl 11299 ax-mulcl 11301 ax-mulcom 11303 ax-addass 11304 ax-mulass 11305 ax-distr 11306 ax-1rid 11309 ax-cnre 11312 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-sb 2102 df-clab 2742 df-cleq 2755 df-clel 2839 df-rex 3091 df-rab 3417 df-v 3456 df-ss 3901 df-dif 4050 df-un 4154 df-nul 4282 df-if 4486 df-sn 4589 df-pr 4591 df-op 4841 df-uni 4873 df-br 5109 df-iota 6520 df-fv 6574 df-ov 7454 df-2 12445 df-3 12446 df-4 12447 |
| This theorem is used by: 4div2e2 12554 div4p1lem1div2 12641 3halfnz 12818 decbin0 13001 fldiv4lem1div2uz2 14016 sq2 14380 sq4e2t8 14382 exp4sqsq 14384 discr 14425 sqoddm1div8 14428 faclbnd2 14476 4bc2eq6 14514 amgm2 15581 bpoly3 16268 sin4lt0 16407 z4even 16586 flodddiv4 16629 flodddiv4t2lthalf 16632 4nprm 16914 2exp4 17306 2exp16 17312 5prm 17330 631prm 17349 1259lem1 17353 1259lem4 17356 2503lem1 17359 2503lem2 17360 2503lem3 17361 4001lem1 17363 4001lem2 17364 4001lem3 17365 4001prm 17367 pcoass 25400 minveclem2 25802 uniioombllem5 25963 uniioombl 25965 dveflem 26354 pilem2 26836 sinhalfpilem 26849 sincosq1lem 26883 tangtx 26891 sincos4thpi 26899 heron 27223 quad2 27224 dquartlem1 27236 dquart 27238 quart1 27241 atan1 27313 log2ublem3 27333 log2ub 27334 chtub 27596 bclbnd 27664 bpos1 27667 bposlem2 27669 bposlem6 27673 bposlem9 27676 gausslemma2dlem3 27752 m1lgs 27772 2lgslem1a2 27774 2lgslem3a 27780 2lgslem3b 27781 2lgslem3c 27782 2lgslem3d 27783 pntibndlem2 27975 pntlemg 27982 pntlemr 27986 ex-fl 31105 minvecolem2 31534 polid2i 31816 binom2subadd 33429 quad3d 33437 quad3 36643 420lcm8e840 43327 3exp7 43369 3lexlogpow5ineq1 43370 3lexlogpow2ineq2 43375 3lexlogpow5ineq5 43376 aks4d1p1p2 43386 aks4d1p1 43392 2ap1caineq 43461 25or6to4 43522 cxpi11d 43660 3cubeslem3l 43962 3cubeslem3r 43963 wallispi2lem1 47354 wallispi2lem2 47355 stirlinglem3 47359 stirlinglem10 47366 sin5tlem2 48193 cos5t 48198 goldpolyfactor 48200 2ltceilhalf 48675 ceil5half3 48689 modmkpkne 48710 fmtnorec4 48907 nprmdvdsfacm1lem4 48981 ppivalnn4 48985 2exp340mod341 49104 8exp8mod9 49107 bru4 49752 bru3val 49753 ackval2012 50134 |
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