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| Mirrors > Home > MPE Home > Th. List > lswlgt0cl | Structured version Visualization version GIF version | ||
| Description: The last symbol of a nonempty word is element of the alphabet for the word. (Contributed by Alexander van der Vekens, 1-Oct-2018.) (Proof shortened by AV, 29-Apr-2020.) |
| Ref | Expression |
|---|---|
| lswlgt0cl | β’ ((π β β β§ (π β Word π β§ (β―βπ) = π)) β (lastSβπ) β π) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | simprl 768 | . 2 β’ ((π β β β§ (π β Word π β§ (β―βπ) = π)) β π β Word π) | |
| 2 | eleq1 2813 | . . . . . 6 β’ (π = (β―βπ) β (π β β β (β―βπ) β β)) | |
| 3 | 2 | eqcoms 2732 | . . . . 5 β’ ((β―βπ) = π β (π β β β (β―βπ) β β)) |
| 4 | 3 | adantl 481 | . . . 4 β’ ((π β Word π β§ (β―βπ) = π) β (π β β β (β―βπ) β β)) |
| 5 | wrdfin 14479 | . . . . . . 7 β’ (π β Word π β π β Fin) | |
| 6 | hashnncl 14323 | . . . . . . 7 β’ (π β Fin β ((β―βπ) β β β π β β )) | |
| 7 | 5, 6 | syl 17 | . . . . . 6 β’ (π β Word π β ((β―βπ) β β β π β β )) |
| 8 | 7 | biimpd 228 | . . . . 5 β’ (π β Word π β ((β―βπ) β β β π β β )) |
| 9 | 8 | adantr 480 | . . . 4 β’ ((π β Word π β§ (β―βπ) = π) β ((β―βπ) β β β π β β )) |
| 10 | 4, 9 | sylbid 239 | . . 3 β’ ((π β Word π β§ (β―βπ) = π) β (π β β β π β β )) |
| 11 | 10 | impcom 407 | . 2 β’ ((π β β β§ (π β Word π β§ (β―βπ) = π)) β π β β ) |
| 12 | lswcl 14515 | . 2 β’ ((π β Word π β§ π β β ) β (lastSβπ) β π) | |
| 13 | 1, 11, 12 | syl2anc 583 | 1 β’ ((π β β β§ (π β Word π β§ (β―βπ) = π)) β (lastSβπ) β π) |
| Colors of variables: wff setvar class |
| Syntax hints: β wi 4 β wb 205 β§ wa 395 = wceq 1533 β wcel 2098 β wne 2932 β c0 4314 βcfv 6533 Fincfn 8935 βcn 12209 β―chash 14287 Word cword 14461 lastSclsw 14509 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1789 ax-4 1803 ax-5 1905 ax-6 1963 ax-7 2003 ax-8 2100 ax-9 2108 ax-10 2129 ax-11 2146 ax-12 2163 ax-ext 2695 ax-rep 5275 ax-sep 5289 ax-nul 5296 ax-pow 5353 ax-pr 5417 ax-un 7718 ax-cnex 11162 ax-resscn 11163 ax-1cn 11164 ax-icn 11165 ax-addcl 11166 ax-addrcl 11167 ax-mulcl 11168 ax-mulrcl 11169 ax-mulcom 11170 ax-addass 11171 ax-mulass 11172 ax-distr 11173 ax-i2m1 11174 ax-1ne0 11175 ax-1rid 11176 ax-rnegex 11177 ax-rrecex 11178 ax-cnre 11179 ax-pre-lttri 11180 ax-pre-lttrn 11181 ax-pre-ltadd 11182 ax-pre-mulgt0 11183 |
| This theorem depends on definitions: df-bi 206 df-an 396 df-or 845 df-3or 1085 df-3an 1086 df-tru 1536 df-fal 1546 df-ex 1774 df-nf 1778 df-sb 2060 df-mo 2526 df-eu 2555 df-clab 2702 df-cleq 2716 df-clel 2802 df-nfc 2877 df-ne 2933 df-nel 3039 df-ral 3054 df-rex 3063 df-reu 3369 df-rab 3425 df-v 3468 df-sbc 3770 df-csb 3886 df-dif 3943 df-un 3945 df-in 3947 df-ss 3957 df-pss 3959 df-nul 4315 df-if 4521 df-pw 4596 df-sn 4621 df-pr 4623 df-op 4627 df-uni 4900 df-int 4941 df-iun 4989 df-br 5139 df-opab 5201 df-mpt 5222 df-tr 5256 df-id 5564 df-eprel 5570 df-po 5578 df-so 5579 df-fr 5621 df-we 5623 df-xp 5672 df-rel 5673 df-cnv 5674 df-co 5675 df-dm 5676 df-rn 5677 df-res 5678 df-ima 5679 df-pred 6290 df-ord 6357 df-on 6358 df-lim 6359 df-suc 6360 df-iota 6485 df-fun 6535 df-fn 6536 df-f 6537 df-f1 6538 df-fo 6539 df-f1o 6540 df-fv 6541 df-riota 7357 df-ov 7404 df-oprab 7405 df-mpo 7406 df-om 7849 df-1st 7968 df-2nd 7969 df-frecs 8261 df-wrecs 8292 df-recs 8366 df-rdg 8405 df-1o 8461 df-er 8699 df-en 8936 df-dom 8937 df-sdom 8938 df-fin 8939 df-card 9930 df-pnf 11247 df-mnf 11248 df-xr 11249 df-ltxr 11250 df-le 11251 df-sub 11443 df-neg 11444 df-nn 12210 df-n0 12470 df-z 12556 df-uz 12820 df-fz 13482 df-fzo 13625 df-hash 14288 df-word 14462 df-lsw 14510 |
| This theorem is referenced by: ccats1pfxeqbi 14689 wrdl2exs2 14894 wlkonwlk1l 29389 numclwwlk2lem1 30098 |
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