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| Mirrors > Home > ILE Home > Th. List > 3t3e9 | Unicode version | ||
| Description: 3 times 3 equals 9. (Contributed by NM, 11-May-2004.) |
| Ref | Expression |
|---|---|
| 3t3e9 |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | df-3 9299 |
. . 3
| |
| 2 | 1 | oveq2i 6063 |
. 2
|
| 3 | 3cn 9314 |
. . . . 5
| |
| 4 | 2cn 9310 |
. . . . 5
| |
| 5 | ax-1cn 8222 |
. . . . 5
| |
| 6 | 3, 4, 5 | adddii 8286 |
. . . 4
|
| 7 | 3t2e6 9396 |
. . . . 5
| |
| 8 | 3t1e3 9395 |
. . . . 5
| |
| 9 | 7, 8 | oveq12i 6064 |
. . . 4
|
| 10 | 6, 9 | eqtri 2255 |
. . 3
|
| 11 | 6p3e9 9390 |
. . 3
| |
| 12 | 10, 11 | eqtri 2255 |
. 2
|
| 13 | 2, 12 | eqtri 2255 |
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 717 ax-5 1496 ax-7 1497 ax-gen 1498 ax-ie1 1542 ax-ie2 1543 ax-8 1553 ax-10 1554 ax-11 1555 ax-i12 1556 ax-bndl 1558 ax-4 1559 ax-17 1575 ax-i9 1579 ax-ial 1583 ax-i5r 1584 ax-ext 2216 ax-resscn 8221 ax-1cn 8222 ax-1re 8223 ax-icn 8224 ax-addcl 8225 ax-addrcl 8226 ax-mulcl 8227 ax-mulcom 8230 ax-addass 8231 ax-mulass 8232 ax-distr 8233 ax-1rid 8236 ax-cnre 8240 |
| This theorem depends on definitions: df-bi 117 df-3an 1007 df-tru 1401 df-nf 1510 df-sb 1812 df-clab 2221 df-cleq 2227 df-clel 2230 df-nfc 2375 df-ral 2527 df-rex 2528 df-v 2817 df-un 3217 df-in 3219 df-ss 3226 df-sn 3697 df-pr 3698 df-op 3700 df-uni 3917 df-br 4112 df-iota 5314 df-fv 5362 df-ov 6055 df-2 9298 df-3 9299 df-4 9300 df-5 9301 df-6 9302 df-7 9303 df-8 9304 df-9 9305 |
| This theorem is referenced by: sq3 11002 3dvds 12554 3dvdsdec 12555 3dvds2dec 12556 lgsdir2lem5 15922 |
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