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| Mirrors > Home > MPE Home > Th. List > s3fv2 | Structured version Visualization version GIF version | ||
| Description: Extract the third symbol from a length 3 string. (Contributed by Mario Carneiro, 13-Jan-2017.) |
| Ref | Expression |
|---|---|
| s3fv2 | ⊢ (𝐶 ∈ 𝑉 → (〈“𝐴𝐵𝐶”〉‘2) = 𝐶) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | df-s3 14758 | . 2 ⊢ 〈“𝐴𝐵𝐶”〉 = (〈“𝐴𝐵”〉 ++ 〈“𝐶”〉) | |
| 2 | s2cli 14789 | . 2 ⊢ 〈“𝐴𝐵”〉 ∈ Word V | |
| 3 | s2len 14798 | . 2 ⊢ (♯‘〈“𝐴𝐵”〉) = 2 | |
| 4 | 1, 2, 3 | cats1fvn 14767 | 1 ⊢ (𝐶 ∈ 𝑉 → (〈“𝐴𝐵𝐶”〉‘2) = 𝐶) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 = wceq 1541 ∈ wcel 2113 ‘cfv 6486 2c2 12187 〈“cs2 14750 〈“cs3 14751 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1968 ax-7 2009 ax-8 2115 ax-9 2123 ax-10 2146 ax-11 2162 ax-12 2182 ax-ext 2705 ax-rep 5219 ax-sep 5236 ax-nul 5246 ax-pow 5305 ax-pr 5372 ax-un 7674 ax-cnex 11069 ax-resscn 11070 ax-1cn 11071 ax-icn 11072 ax-addcl 11073 ax-addrcl 11074 ax-mulcl 11075 ax-mulrcl 11076 ax-mulcom 11077 ax-addass 11078 ax-mulass 11079 ax-distr 11080 ax-i2m1 11081 ax-1ne0 11082 ax-1rid 11083 ax-rnegex 11084 ax-rrecex 11085 ax-cnre 11086 ax-pre-lttri 11087 ax-pre-lttrn 11088 ax-pre-ltadd 11089 ax-pre-mulgt0 11090 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3or 1087 df-3an 1088 df-tru 1544 df-fal 1554 df-ex 1781 df-nf 1785 df-sb 2068 df-mo 2537 df-eu 2566 df-clab 2712 df-cleq 2725 df-clel 2808 df-nfc 2882 df-ne 2930 df-nel 3034 df-ral 3049 df-rex 3058 df-reu 3348 df-rab 3397 df-v 3439 df-sbc 3738 df-csb 3847 df-dif 3901 df-un 3903 df-in 3905 df-ss 3915 df-pss 3918 df-nul 4283 df-if 4475 df-pw 4551 df-sn 4576 df-pr 4578 df-op 4582 df-uni 4859 df-int 4898 df-iun 4943 df-br 5094 df-opab 5156 df-mpt 5175 df-tr 5201 df-id 5514 df-eprel 5519 df-po 5527 df-so 5528 df-fr 5572 df-we 5574 df-xp 5625 df-rel 5626 df-cnv 5627 df-co 5628 df-dm 5629 df-rn 5630 df-res 5631 df-ima 5632 df-pred 6253 df-ord 6314 df-on 6315 df-lim 6316 df-suc 6317 df-iota 6442 df-fun 6488 df-fn 6489 df-f 6490 df-f1 6491 df-fo 6492 df-f1o 6493 df-fv 6494 df-riota 7309 df-ov 7355 df-oprab 7356 df-mpo 7357 df-om 7803 df-1st 7927 df-2nd 7928 df-frecs 8217 df-wrecs 8248 df-recs 8297 df-rdg 8335 df-1o 8391 df-er 8628 df-en 8876 df-dom 8877 df-sdom 8878 df-fin 8879 df-card 9839 df-pnf 11155 df-mnf 11156 df-xr 11157 df-ltxr 11158 df-le 11159 df-sub 11353 df-neg 11354 df-nn 12133 df-2 12195 df-n0 12389 df-z 12476 df-uz 12739 df-fz 13410 df-fzo 13557 df-hash 14240 df-word 14423 df-concat 14480 df-s1 14506 df-s2 14757 df-s3 14758 |
| This theorem is referenced by: s4fv2 14806 lsws3 14814 eqwrds3 14870 s3sndisj 14876 uncfval 18142 ex-chn2 18546 trgcgrg 28494 israg 28676 iscgra 28788 isinag 28817 isleag 28826 iseqlg 28846 2wlkdlem3 29907 2wlkond 29917 umgr2adedgwlk 29925 s3wwlks2on 29936 sps3wwlks2on 29937 usgrwwlks2on 29938 umgrwwlks2on 29939 elwwlks2 29949 elwspths2spth 29950 wlk2v2elem2 30138 3wlkdlem8 30149 s3rnOLD 32934 s3f1 32935 cyc3fv2 33114 cyc3fv3 33115 circlemethhgt 34677 2cycld 35203 |
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