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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 9373 |
. . 3
| |
| 2 | 1 | oveq2i 6099 |
. 2
|
| 3 | 3cn 9388 |
. . . . 5
| |
| 4 | 2cn 9384 |
. . . . 5
| |
| 5 | ax-1cn 8278 |
. . . . 5
| |
| 6 | 3, 4, 5 | adddii 8342 |
. . . 4
|
| 7 | 3t2e6 9470 |
. . . . 5
| |
| 8 | 3t1e3 9469 |
. . . . 5
| |
| 9 | 7, 8 | oveq12i 6100 |
. . . 4
|
| 10 | 6, 9 | eqtri 2259 |
. . 3
|
| 11 | 6p3e9 9464 |
. . 3
| |
| 12 | 10, 11 | eqtri 2259 |
. 2
|
| 13 | 2, 12 | eqtri 2259 |
1
|
| Colors of variables: wff set class |
| This proof depends on syntax axioms:
|
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-io 721 ax-5 1500 ax-7 1501 ax-gen 1502 ax-ie1 1546 ax-ie2 1547 ax-8 1557 ax-10 1558 ax-11 1559 ax-i12 1560 ax-bndl 1562 ax-4 1563 ax-17 1579 ax-i9 1583 ax-ial 1587 ax-i5r 1588 ax-ext 2220 ax-resscn 8277 ax-1cn 8278 ax-1re 8279 ax-icn 8280 ax-addcl 8281 ax-addrcl 8282 ax-mulcl 8283 ax-mulcom 8286 ax-addass 8287 ax-mulass 8288 ax-distr 8289 ax-1rid 8292 ax-cnre 8296 |
| This proof depends on definitions: df-bi 117 df-3an 1011 df-tru 1405 df-nf 1514 df-sb 1816 df-clab 2225 df-cleq 2231 df-clel 2234 df-nfc 2381 df-ral 2533 df-rex 2534 df-v 2823 df-un 3224 df-in 3226 df-ss 3233 df-sn 3715 df-pr 3716 df-op 3718 df-uni 3936 df-br 4132 df-iota 5340 df-fv 5388 df-ov 6091 df-2 9372 df-3 9373 df-4 9374 df-5 9375 df-6 9376 df-7 9377 df-8 9378 df-9 9379 |
| This theorem is used by: sq3 11093 3dvds 12655 3dvdsdec 12656 3dvds2dec 12657 9nprm 13255 11prm 13257 43prm 13264 83prm 13265 317prm 13268 1259lem2 13271 1259lem4 13273 1259prm 13275 log2tlbndlog2 16237 log2ublem3 16240 log2ublog2 16241 bposlem9 16336 lgsdir2lem5 16373 |
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