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| Mirrors > Home > MPE Home > Th. List > 7t3e21 | Structured version Visualization version GIF version | ||
| Description: 7 times 3 equals 21. (Contributed by Mario Carneiro, 19-Apr-2015.) |
| Ref | Expression |
|---|---|
| 7t3e21 | ⊢ (7 · 3) = ;21 |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | 7nn0 12437 | . 2 ⊢ 7 ∈ ℕ0 | |
| 2 | 2nn0 12432 | . 2 ⊢ 2 ∈ ℕ0 | |
| 3 | df-3 12223 | . 2 ⊢ 3 = (2 + 1) | |
| 4 | 7t2e14 12730 | . 2 ⊢ (7 · 2) = ;14 | |
| 5 | 1nn0 12431 | . . 3 ⊢ 1 ∈ ℕ0 | |
| 6 | 4nn0 12434 | . . 3 ⊢ 4 ∈ ℕ0 | |
| 7 | eqid 2737 | . . 3 ⊢ ;14 = ;14 | |
| 8 | 1p1e2 12279 | . . 3 ⊢ (1 + 1) = 2 | |
| 9 | 1 | nn0cni 12427 | . . . 4 ⊢ 7 ∈ ℂ |
| 10 | 6 | nn0cni 12427 | . . . 4 ⊢ 4 ∈ ℂ |
| 11 | 7p4e11 12697 | . . . 4 ⊢ (7 + 4) = ;11 | |
| 12 | 9, 10, 11 | addcomli 11339 | . . 3 ⊢ (4 + 7) = ;11 |
| 13 | 5, 6, 1, 7, 8, 5, 12 | decaddci 12682 | . 2 ⊢ (;14 + 7) = ;21 |
| 14 | 1, 2, 3, 4, 13 | 4t3lem 12718 | 1 ⊢ (7 · 3) = ;21 |
| Colors of variables: wff setvar class |
| Syntax hints: = wceq 1542 (class class class)co 7370 1c1 11041 · cmul 11045 2c2 12214 3c3 12215 4c4 12216 7c7 12219 ;cdc 12621 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-10 2147 ax-11 2163 ax-12 2185 ax-ext 2709 ax-sep 5245 ax-nul 5255 ax-pow 5314 ax-pr 5381 ax-un 7692 ax-resscn 11097 ax-1cn 11098 ax-icn 11099 ax-addcl 11100 ax-addrcl 11101 ax-mulcl 11102 ax-mulrcl 11103 ax-mulcom 11104 ax-addass 11105 ax-mulass 11106 ax-distr 11107 ax-i2m1 11108 ax-1ne0 11109 ax-1rid 11110 ax-rnegex 11111 ax-rrecex 11112 ax-cnre 11113 ax-pre-lttri 11114 ax-pre-lttrn 11115 ax-pre-ltadd 11116 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3or 1088 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-nf 1786 df-sb 2069 df-mo 2540 df-eu 2570 df-clab 2716 df-cleq 2729 df-clel 2812 df-nfc 2886 df-ne 2934 df-nel 3038 df-ral 3053 df-rex 3063 df-reu 3353 df-rab 3402 df-v 3444 df-sbc 3743 df-csb 3852 df-dif 3906 df-un 3908 df-in 3910 df-ss 3920 df-pss 3923 df-nul 4288 df-if 4482 df-pw 4558 df-sn 4583 df-pr 4585 df-op 4589 df-uni 4866 df-iun 4950 df-br 5101 df-opab 5163 df-mpt 5182 df-tr 5208 df-id 5529 df-eprel 5534 df-po 5542 df-so 5543 df-fr 5587 df-we 5589 df-xp 5640 df-rel 5641 df-cnv 5642 df-co 5643 df-dm 5644 df-rn 5645 df-res 5646 df-ima 5647 df-pred 6269 df-ord 6330 df-on 6331 df-lim 6332 df-suc 6333 df-iota 6458 df-fun 6504 df-fn 6505 df-f 6506 df-f1 6507 df-fo 6508 df-f1o 6509 df-fv 6510 df-riota 7327 df-ov 7373 df-oprab 7374 df-mpo 7375 df-om 7821 df-2nd 7946 df-frecs 8235 df-wrecs 8266 df-recs 8315 df-rdg 8353 df-er 8647 df-en 8898 df-dom 8899 df-sdom 8900 df-pnf 11182 df-mnf 11183 df-ltxr 11185 df-sub 11380 df-nn 12160 df-2 12222 df-3 12223 df-4 12224 df-5 12225 df-6 12226 df-7 12227 df-8 12228 df-9 12229 df-n0 12416 df-dec 12622 |
| This theorem is referenced by: 7t4e28 12732 23prm 17060 prmlem2 17061 83prm 17064 163prm 17066 631prm 17068 1259prm 17077 log2ublem3 26931 log2ub 26932 ex-prmo 30552 hgt750lem2 34836 3exp7 42452 235t711 42704 ex-decpmul 42705 257prm 47950 |
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