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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 12341 | . . 3 ⊢ 2 ∈ ℂ | |
| 2 | 1 | 2timesi 12403 | . 2 ⊢ (2 · 2) = (2 + 2) |
| 3 | 2p2e4 12400 | . 2 ⊢ (2 + 2) = 4 | |
| 4 | 2, 3 | eqtri 2783 | 1 ⊢ (2 · 2) = 4 |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: = wceq 1570 (class class class)co 7414 + caddc 11128 · cmul 11130 2c2 12320 4c4 12322 |
| 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 2732 ax-resscn 11182 ax-1cn 11183 ax-icn 11184 ax-addcl 11185 ax-mulcl 11187 ax-mulcom 11189 ax-addass 11190 ax-mulass 11191 ax-distr 11192 ax-1rid 11195 ax-cnre 11198 |
| 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 2739 df-cleq 2752 df-clel 2835 df-rex 3087 df-rab 3413 df-v 3452 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 6489 df-fv 6541 df-ov 7417 df-2 12328 df-3 12329 df-4 12330 |
| This theorem is used by: 4div2e2 12437 div4p1lem1div2 12524 3halfnz 12701 decbin0 12884 fldiv4lem1div2uz2 13898 sq2 14262 sq4e2t8 14264 discr 14305 sqoddm1div8 14308 faclbnd2 14356 4bc2eq6 14394 amgm2 15458 bpoly3 16145 sin4lt0 16284 z4even 16463 flodddiv4 16506 flodddiv4t2lthalf 16509 4nprm 16786 2exp4 17177 2exp16 17183 5prm 17201 631prm 17220 1259lem1 17224 1259lem4 17227 2503lem1 17230 2503lem2 17231 2503lem3 17232 4001lem1 17234 4001lem2 17235 4001lem3 17236 4001prm 17238 pcoass 25253 minveclem2 25655 uniioombllem5 25816 uniioombl 25818 dveflem 26207 pilem2 26689 sinhalfpilem 26702 sincosq1lem 26736 tangtx 26744 sincos4thpi 26752 heron 27076 quad2 27077 dquartlem1 27089 dquart 27091 quart1 27094 atan1 27166 log2ublem3 27186 log2ub 27187 chtub 27449 bclbnd 27517 bpos1 27520 bposlem2 27522 bposlem6 27526 bposlem9 27529 gausslemma2dlem3 27605 m1lgs 27625 2lgslem1a2 27627 2lgslem3a 27633 2lgslem3b 27634 2lgslem3c 27635 2lgslem3d 27636 pntibndlem2 27828 pntlemg 27835 pntlemr 27839 ex-fl 30928 minvecolem2 31357 polid2i 31639 binom2subadd 33213 quad3d 33221 quad3 36250 420lcm8e840 42878 3exp7 42920 3lexlogpow5ineq1 42921 3lexlogpow2ineq2 42926 3lexlogpow5ineq5 42927 aks4d1p1p2 42937 aks4d1p1 42943 2ap1caineq 43012 25or6to4 43073 cxpi11d 43219 flt4lem 43492 3cubeslem3l 43532 3cubeslem3r 43533 wallispi2lem1 46900 wallispi2lem2 46901 stirlinglem3 46905 stirlinglem10 46912 sin5tlem2 47739 cos5t 47744 goldpolyfactor 47746 2ltceilhalf 48221 ceil5half3 48235 modmkpkne 48256 fmtnorec4 48453 nprmdvdsfacm1lem4 48527 ppivalnn4 48531 2exp340mod341 48650 8exp8mod9 48653 ackval2012 49622 |
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