![]() |
Intuitionistic Logic Explorer |
< Previous
Next >
Nearby theorems |
|
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 8177 |
. . 3
![]() ![]() ![]() ![]() | |
2 | 1 | 2timesi 8229 |
. 2
![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() |
3 | 2p2e4 8226 |
. 2
![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() | |
4 | 2, 3 | eqtri 2102 |
1
![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() |
Colors of variables: wff set class |
Syntax hints: ![]() ![]() ![]() ![]() ![]() |
This theorem was proved from axioms: ax-1 5 ax-2 6 ax-mp 7 ax-ia1 104 ax-ia2 105 ax-ia3 106 ax-io 663 ax-5 1377 ax-7 1378 ax-gen 1379 ax-ie1 1423 ax-ie2 1424 ax-8 1436 ax-10 1437 ax-11 1438 ax-i12 1439 ax-bndl 1440 ax-4 1441 ax-17 1460 ax-i9 1464 ax-ial 1468 ax-i5r 1469 ax-ext 2064 ax-resscn 7130 ax-1cn 7131 ax-1re 7132 ax-icn 7133 ax-addcl 7134 ax-addrcl 7135 ax-mulcl 7136 ax-mulcom 7139 ax-addass 7140 ax-mulass 7141 ax-distr 7142 ax-1rid 7145 ax-cnre 7149 |
This theorem depends on definitions: df-bi 115 df-3an 922 df-tru 1288 df-nf 1391 df-sb 1687 df-clab 2069 df-cleq 2075 df-clel 2078 df-nfc 2209 df-ral 2354 df-rex 2355 df-v 2604 df-un 2978 df-in 2980 df-ss 2987 df-sn 3412 df-pr 3413 df-op 3415 df-uni 3610 df-br 3794 df-iota 4897 df-fv 4940 df-ov 5546 df-2 8165 df-3 8166 df-4 8167 |
This theorem is referenced by: 4d2e2 8259 halfpm6th 8318 div4p1lem1div2 8351 3halfnz 8525 decbin0 8697 sq2 9668 sqoddm1div8 9722 faclbnd2 9766 4bc2eq6 9798 amgm2 10142 z4even 10460 flodddiv4 10478 flodddiv4t2lthalf 10481 4nprm 10655 ex-fl 10714 |
Copyright terms: Public domain | W3C validator |