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| Mirrors > Home > ILE Home > Th. List > 2t2e4 | Unicode version | ||
| Description: 2 times 2 equals 4. (Contributed by NM, 1-Aug-1999.) |
| Ref | Expression |
|---|---|
| 2t2e4 |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | 2cn 9181 |
. . 3
| |
| 2 | 1 | 2timesi 9240 |
. 2
|
| 3 | 2p2e4 9237 |
. 2
| |
| 4 | 2, 3 | eqtri 2250 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| 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 714 ax-5 1493 ax-7 1494 ax-gen 1495 ax-ie1 1539 ax-ie2 1540 ax-8 1550 ax-10 1551 ax-11 1552 ax-i12 1553 ax-bndl 1555 ax-4 1556 ax-17 1572 ax-i9 1576 ax-ial 1580 ax-i5r 1581 ax-ext 2211 ax-resscn 8091 ax-1cn 8092 ax-1re 8093 ax-icn 8094 ax-addcl 8095 ax-addrcl 8096 ax-mulcl 8097 ax-mulcom 8100 ax-addass 8101 ax-mulass 8102 ax-distr 8103 ax-1rid 8106 ax-cnre 8110 |
| This theorem depends on definitions: df-bi 117 df-3an 1004 df-tru 1398 df-nf 1507 df-sb 1809 df-clab 2216 df-cleq 2222 df-clel 2225 df-nfc 2361 df-ral 2513 df-rex 2514 df-v 2801 df-un 3201 df-in 3203 df-ss 3210 df-sn 3672 df-pr 3673 df-op 3675 df-uni 3889 df-br 4084 df-iota 5278 df-fv 5326 df-ov 6004 df-2 9169 df-3 9170 df-4 9171 |
| This theorem is referenced by: 4d2e2 9271 halfpm6th 9331 div4p1lem1div2 9365 3halfnz 9544 decbin0 9717 fldiv4lem1div2uz2 10526 sq2 10857 sq4e2t8 10859 sqoddm1div8 10915 faclbnd2 10964 4bc2eq6 10996 amgm2 11629 sin4lt0 12278 z4even 12427 flodddiv4 12447 flodddiv4t2lthalf 12450 4nprm 12651 2exp4 12954 2exp16 12960 dveflem 15400 sin0pilem2 15456 sinhalfpilem 15465 sincosq1lem 15499 tangtx 15512 sincos4thpi 15514 gausslemma2dlem3 15742 m1lgs 15764 2lgslem1a2 15766 2lgslem3a 15772 2lgslem3b 15773 2lgslem3c 15774 2lgslem3d 15775 ex-fl 16089 |
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