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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 12418 | . . 3 ⊢ 2 ∈ ℂ | |
| 2 | 1 | 2timesi 12480 | . 2 ⊢ (2 · 2) = (2 + 2) |
| 3 | 2p2e4 12477 | . 2 ⊢ (2 + 2) = 4 | |
| 4 | 2, 3 | eqtri 2784 | 1 ⊢ (2 · 2) = 4 |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: = wceq 1570 (class class class)co 7420 + caddc 11203 · cmul 11205 2c2 12397 4c4 12399 |
| 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 1943 ax-6 2000 ax-7 2041 ax-8 2147 ax-9 2155 ax-ext 2733 ax-resscn 11257 ax-1cn 11258 ax-icn 11259 ax-addcl 11260 ax-mulcl 11262 ax-mulcom 11264 ax-addass 11265 ax-mulass 11266 ax-distr 11267 ax-1rid 11270 ax-cnre 11273 |
| 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 2100 df-clab 2740 df-cleq 2753 df-clel 2836 df-rex 3088 df-rab 3414 df-v 3453 df-dif 3902 df-un 3904 df-ss 3916 df-nul 4280 df-if 4483 df-sn 4585 df-pr 4587 df-op 4591 df-uni 4868 df-br 5104 df-iota 6494 df-fv 6546 df-ov 7423 df-2 12405 df-3 12406 df-4 12407 |
| This theorem is used by: 4div2e2 12514 div4p1lem1div2 12601 3halfnz 12778 decbin0 12961 fldiv4lem1div2uz2 13976 sq2 14340 sq4e2t8 14342 exp4sqsq 14344 discr 14384 sqoddm1div8 14387 faclbnd2 14435 4bc2eq6 14473 amgm2 15537 bpoly3 16224 sin4lt0 16363 z4even 16542 flodddiv4 16585 flodddiv4t2lthalf 16588 4nprm 16870 2exp4 17262 2exp16 17268 5prm 17286 631prm 17305 1259lem1 17309 1259lem4 17312 2503lem1 17315 2503lem2 17316 2503lem3 17317 4001lem1 17319 4001lem2 17320 4001lem3 17321 4001prm 17323 pcoass 25345 minveclem2 25747 uniioombllem5 25908 uniioombl 25910 dveflem 26299 pilem2 26779 sinhalfpilem 26792 sincosq1lem 26826 tangtx 26834 sincos4thpi 26842 heron 27166 quad2 27167 dquartlem1 27179 dquart 27181 quart1 27184 atan1 27256 log2ublem3 27276 log2ub 27277 chtub 27539 bclbnd 27607 bpos1 27610 bposlem2 27612 bposlem6 27616 bposlem9 27619 gausslemma2dlem3 27695 m1lgs 27715 2lgslem1a2 27717 2lgslem3a 27723 2lgslem3b 27724 2lgslem3c 27725 2lgslem3d 27726 pntibndlem2 27918 pntlemg 27925 pntlemr 27929 ex-fl 31048 minvecolem2 31477 polid2i 31759 binom2subadd 33333 quad3d 33341 quad3 36435 420lcm8e840 43061 3exp7 43103 3lexlogpow5ineq1 43104 3lexlogpow2ineq2 43109 3lexlogpow5ineq5 43110 aks4d1p1p2 43120 aks4d1p1 43126 2ap1caineq 43195 25or6to4 43256 cxpi11d 43394 3cubeslem3l 43696 3cubeslem3r 43697 wallispi2lem1 47080 wallispi2lem2 47081 stirlinglem3 47085 stirlinglem10 47092 sin5tlem2 47919 cos5t 47924 goldpolyfactor 47926 2ltceilhalf 48401 ceil5half3 48415 modmkpkne 48436 fmtnorec4 48633 nprmdvdsfacm1lem4 48707 ppivalnn4 48711 2exp340mod341 48830 8exp8mod9 48833 ackval2012 49802 |
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