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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 9203 |
. . 3
| |
| 2 | 1 | oveq2i 6029 |
. 2
|
| 3 | 3cn 9218 |
. . . . 5
| |
| 4 | 2cn 9214 |
. . . . 5
| |
| 5 | ax-1cn 8125 |
. . . . 5
| |
| 6 | 3, 4, 5 | adddii 8189 |
. . . 4
|
| 7 | 3t2e6 9300 |
. . . . 5
| |
| 8 | 3t1e3 9299 |
. . . . 5
| |
| 9 | 7, 8 | oveq12i 6030 |
. . . 4
|
| 10 | 6, 9 | eqtri 2252 |
. . 3
|
| 11 | 6p3e9 9294 |
. . 3
| |
| 12 | 10, 11 | eqtri 2252 |
. 2
|
| 13 | 2, 12 | eqtri 2252 |
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 716 ax-5 1495 ax-7 1496 ax-gen 1497 ax-ie1 1541 ax-ie2 1542 ax-8 1552 ax-10 1553 ax-11 1554 ax-i12 1555 ax-bndl 1557 ax-4 1558 ax-17 1574 ax-i9 1578 ax-ial 1582 ax-i5r 1583 ax-ext 2213 ax-resscn 8124 ax-1cn 8125 ax-1re 8126 ax-icn 8127 ax-addcl 8128 ax-addrcl 8129 ax-mulcl 8130 ax-mulcom 8133 ax-addass 8134 ax-mulass 8135 ax-distr 8136 ax-1rid 8139 ax-cnre 8143 |
| This theorem depends on definitions: df-bi 117 df-3an 1006 df-tru 1400 df-nf 1509 df-sb 1811 df-clab 2218 df-cleq 2224 df-clel 2227 df-nfc 2363 df-ral 2515 df-rex 2516 df-v 2804 df-un 3204 df-in 3206 df-ss 3213 df-sn 3675 df-pr 3676 df-op 3678 df-uni 3894 df-br 4089 df-iota 5286 df-fv 5334 df-ov 6021 df-2 9202 df-3 9203 df-4 9204 df-5 9205 df-6 9206 df-7 9207 df-8 9208 df-9 9209 |
| This theorem is referenced by: sq3 10898 3dvds 12426 3dvdsdec 12427 3dvds2dec 12428 lgsdir2lem5 15763 |
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