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| Mirrors > Home > ILE Home > Th. List > 7t3e21 | Unicode version | ||
| Description: 7 times 3 equals 21. (Contributed by Mario Carneiro, 19-Apr-2015.) |
| Ref | Expression |
|---|---|
| 7t3e21 |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | 7nn0 9354 |
. 2
| |
| 2 | 2nn0 9349 |
. 2
| |
| 3 | df-3 9133 |
. 2
| |
| 4 | 7t2e14 9649 |
. 2
| |
| 5 | 1nn0 9348 |
. . 3
| |
| 6 | 4nn0 9351 |
. . 3
| |
| 7 | eqid 2207 |
. . 3
| |
| 8 | 1p1e2 9190 |
. . 3
| |
| 9 | 1 | nn0cni 9344 |
. . . 4
|
| 10 | 6 | nn0cni 9344 |
. . . 4
|
| 11 | 7p4e11 9616 |
. . . 4
| |
| 12 | 9, 10, 11 | addcomli 8254 |
. . 3
|
| 13 | 5, 6, 1, 7, 8, 5, 12 | decaddci 9601 |
. 2
|
| 14 | 1, 2, 3, 4, 13 | 4t3lem 9637 |
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-in1 615 ax-in2 616 ax-io 711 ax-5 1471 ax-7 1472 ax-gen 1473 ax-ie1 1517 ax-ie2 1518 ax-8 1528 ax-10 1529 ax-11 1530 ax-i12 1531 ax-bndl 1533 ax-4 1534 ax-17 1550 ax-i9 1554 ax-ial 1558 ax-i5r 1559 ax-14 2181 ax-ext 2189 ax-sep 4179 ax-pow 4235 ax-pr 4270 ax-setind 4604 ax-cnex 8053 ax-resscn 8054 ax-1cn 8055 ax-1re 8056 ax-icn 8057 ax-addcl 8058 ax-addrcl 8059 ax-mulcl 8060 ax-addcom 8062 ax-mulcom 8063 ax-addass 8064 ax-mulass 8065 ax-distr 8066 ax-i2m1 8067 ax-1rid 8069 ax-0id 8070 ax-rnegex 8071 ax-cnre 8073 |
| This theorem depends on definitions: df-bi 117 df-3an 983 df-tru 1376 df-fal 1379 df-nf 1485 df-sb 1787 df-eu 2058 df-mo 2059 df-clab 2194 df-cleq 2200 df-clel 2203 df-nfc 2339 df-ne 2379 df-ral 2491 df-rex 2492 df-reu 2493 df-rab 2495 df-v 2779 df-sbc 3007 df-dif 3177 df-un 3179 df-in 3181 df-ss 3188 df-pw 3629 df-sn 3650 df-pr 3651 df-op 3653 df-uni 3866 df-int 3901 df-br 4061 df-opab 4123 df-id 4359 df-xp 4700 df-rel 4701 df-cnv 4702 df-co 4703 df-dm 4704 df-iota 5252 df-fun 5293 df-fv 5299 df-riota 5924 df-ov 5972 df-oprab 5973 df-mpo 5974 df-sub 8282 df-inn 9074 df-2 9132 df-3 9133 df-4 9134 df-5 9135 df-6 9136 df-7 9137 df-8 9138 df-9 9139 df-n0 9333 df-dec 9542 |
| This theorem is referenced by: 7t4e28 9651 |
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