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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 9193 |
. . 3
| |
| 2 | 1 | oveq2i 6024 |
. 2
|
| 3 | 3cn 9208 |
. . . . 5
| |
| 4 | 2cn 9204 |
. . . . 5
| |
| 5 | ax-1cn 8115 |
. . . . 5
| |
| 6 | 3, 4, 5 | adddii 8179 |
. . . 4
|
| 7 | 3t2e6 9290 |
. . . . 5
| |
| 8 | 3t1e3 9289 |
. . . . 5
| |
| 9 | 7, 8 | oveq12i 6025 |
. . . 4
|
| 10 | 6, 9 | eqtri 2250 |
. . 3
|
| 11 | 6p3e9 9284 |
. . 3
| |
| 12 | 10, 11 | eqtri 2250 |
. 2
|
| 13 | 2, 12 | 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 8114 ax-1cn 8115 ax-1re 8116 ax-icn 8117 ax-addcl 8118 ax-addrcl 8119 ax-mulcl 8120 ax-mulcom 8123 ax-addass 8124 ax-mulass 8125 ax-distr 8126 ax-1rid 8129 ax-cnre 8133 |
| 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 2802 df-un 3202 df-in 3204 df-ss 3211 df-sn 3673 df-pr 3674 df-op 3676 df-uni 3892 df-br 4087 df-iota 5284 df-fv 5332 df-ov 6016 df-2 9192 df-3 9193 df-4 9194 df-5 9195 df-6 9196 df-7 9197 df-8 9198 df-9 9199 |
| This theorem is referenced by: sq3 10888 3dvds 12415 3dvdsdec 12416 3dvds2dec 12417 lgsdir2lem5 15751 |
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