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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 12320 | . . 3 ⊢ 2 ∈ ℂ | |
| 2 | 1 | 2timesi 12382 | . 2 ⊢ (2 · 2) = (2 + 2) |
| 3 | 2p2e4 12379 | . 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 7410 + caddc 11107 · cmul 11109 2c2 12299 4c4 12301 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1825 ax-4 1839 ax-5 1940 ax-6 1997 ax-7 2038 ax-8 2145 ax-9 2153 ax-ext 2735 ax-resscn 11161 ax-1cn 11162 ax-icn 11163 ax-addcl 11164 ax-mulcl 11166 ax-mulcom 11168 ax-addass 11169 ax-mulass 11170 ax-distr 11171 ax-1rid 11174 ax-cnre 11177 |
| This proof depends on definitions: df-bi 210 df-an 401 df-or 861 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1810 df-sb 2097 df-clab 2742 df-cleq 2755 df-clel 2838 df-rex 3090 df-rab 3417 df-v 3457 df-dif 3908 df-un 3910 df-ss 3922 df-nul 4287 df-if 4488 df-sn 4590 df-pr 4592 df-op 4596 df-uni 4873 df-br 5110 df-iota 6492 df-fv 6544 df-ov 7413 df-2 12307 df-3 12308 df-4 12309 |
| This theorem is used by: 4div2e2 12416 div4p1lem1div2 12503 3halfnz 12679 decbin0 12862 fldiv4lem1div2uz2 13874 sq2 14238 sq4e2t8 14240 discr 14281 sqoddm1div8 14284 faclbnd2 14332 4bc2eq6 14370 amgm2 15426 bpoly3 16116 sin4lt0 16255 z4even 16434 flodddiv4 16477 flodddiv4t2lthalf 16480 4nprm 16757 2exp4 17148 2exp16 17154 5prm 17172 631prm 17191 1259lem1 17195 1259lem4 17198 2503lem1 17201 2503lem2 17202 2503lem3 17203 4001lem1 17205 4001lem2 17206 4001lem3 17207 4001prm 17209 pcoass 25192 minveclem2 25594 uniioombllem5 25755 uniioombl 25757 dveflem 26147 pilem2 26624 sinhalfpilem 26637 sincosq1lem 26671 tangtx 26679 sincos4thpi 26687 heron 27012 quad2 27013 dquartlem1 27025 dquart 27027 quart1 27030 atan1 27102 log2ublem3 27122 log2ub 27123 chtub 27385 bclbnd 27453 bpos1 27456 bposlem2 27458 bposlem6 27462 bposlem9 27465 gausslemma2dlem3 27541 m1lgs 27561 2lgslem1a2 27563 2lgslem3a 27569 2lgslem3b 27570 2lgslem3c 27571 2lgslem3d 27572 pntibndlem2 27764 pntlemg 27771 pntlemr 27775 ex-fl 30807 minvecolem2 31236 polid2i 31518 binom2subadd 33095 quad3d 33103 quad3 36170 420lcm8e840 42806 3exp7 42848 3lexlogpow5ineq1 42849 3lexlogpow2ineq2 42854 3lexlogpow5ineq5 42855 aks4d1p1p2 42865 aks4d1p1 42871 2ap1caineq 42940 25or6to4 43001 cxpi11d 43132 flt4lem 43405 3cubeslem3l 43445 3cubeslem3r 43446 wallispi2lem1 46813 wallispi2lem2 46814 stirlinglem3 46818 stirlinglem10 46825 sin5tlem2 47639 cos5t 47644 2ltceilhalf 48097 ceil5half3 48111 modmkpkne 48132 fmtnorec4 48329 nprmdvdsfacm1lem4 48403 ppivalnn4 48407 2exp340mod341 48526 8exp8mod9 48529 ackval2012 49499 |
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