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Mirrors > Home > MPE Home > Th. List > Mathboxes > lpadlem2 | Structured version Visualization version GIF version |
Description: Lemma for the leftpad theorems. (Contributed by Thierry Arnoux, 7-Aug-2023.) |
Ref | Expression |
---|---|
lpadlen.1 | ⊢ (𝜑 → 𝐿 ∈ ℕ0) |
lpadlen.2 | ⊢ (𝜑 → 𝑊 ∈ Word 𝑆) |
lpadlen.3 | ⊢ (𝜑 → 𝐶 ∈ 𝑆) |
lpadlen2.1 | ⊢ (𝜑 → (♯‘𝑊) ≤ 𝐿) |
Ref | Expression |
---|---|
lpadlem2 | ⊢ (𝜑 → (♯‘((0..^(𝐿 − (♯‘𝑊))) × {𝐶})) = (𝐿 − (♯‘𝑊))) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | fzofi 13547 | . . . 4 ⊢ (0..^(𝐿 − (♯‘𝑊))) ∈ Fin | |
2 | snfi 8721 | . . . 4 ⊢ {𝐶} ∈ Fin | |
3 | hashxp 14001 | . . . 4 ⊢ (((0..^(𝐿 − (♯‘𝑊))) ∈ Fin ∧ {𝐶} ∈ Fin) → (♯‘((0..^(𝐿 − (♯‘𝑊))) × {𝐶})) = ((♯‘(0..^(𝐿 − (♯‘𝑊)))) · (♯‘{𝐶}))) | |
4 | 1, 2, 3 | mp2an 692 | . . 3 ⊢ (♯‘((0..^(𝐿 − (♯‘𝑊))) × {𝐶})) = ((♯‘(0..^(𝐿 − (♯‘𝑊)))) · (♯‘{𝐶})) |
5 | 4 | a1i 11 | . 2 ⊢ (𝜑 → (♯‘((0..^(𝐿 − (♯‘𝑊))) × {𝐶})) = ((♯‘(0..^(𝐿 − (♯‘𝑊)))) · (♯‘{𝐶}))) |
6 | lpadlen.2 | . . . . . 6 ⊢ (𝜑 → 𝑊 ∈ Word 𝑆) | |
7 | lencl 14088 | . . . . . 6 ⊢ (𝑊 ∈ Word 𝑆 → (♯‘𝑊) ∈ ℕ0) | |
8 | 6, 7 | syl 17 | . . . . 5 ⊢ (𝜑 → (♯‘𝑊) ∈ ℕ0) |
9 | lpadlen.1 | . . . . 5 ⊢ (𝜑 → 𝐿 ∈ ℕ0) | |
10 | lpadlen2.1 | . . . . 5 ⊢ (𝜑 → (♯‘𝑊) ≤ 𝐿) | |
11 | nn0sub2 12238 | . . . . 5 ⊢ (((♯‘𝑊) ∈ ℕ0 ∧ 𝐿 ∈ ℕ0 ∧ (♯‘𝑊) ≤ 𝐿) → (𝐿 − (♯‘𝑊)) ∈ ℕ0) | |
12 | 8, 9, 10, 11 | syl3anc 1373 | . . . 4 ⊢ (𝜑 → (𝐿 − (♯‘𝑊)) ∈ ℕ0) |
13 | hashfzo0 13997 | . . . 4 ⊢ ((𝐿 − (♯‘𝑊)) ∈ ℕ0 → (♯‘(0..^(𝐿 − (♯‘𝑊)))) = (𝐿 − (♯‘𝑊))) | |
14 | 12, 13 | syl 17 | . . 3 ⊢ (𝜑 → (♯‘(0..^(𝐿 − (♯‘𝑊)))) = (𝐿 − (♯‘𝑊))) |
15 | lpadlen.3 | . . . 4 ⊢ (𝜑 → 𝐶 ∈ 𝑆) | |
16 | hashsng 13936 | . . . 4 ⊢ (𝐶 ∈ 𝑆 → (♯‘{𝐶}) = 1) | |
17 | 15, 16 | syl 17 | . . 3 ⊢ (𝜑 → (♯‘{𝐶}) = 1) |
18 | 14, 17 | oveq12d 7231 | . 2 ⊢ (𝜑 → ((♯‘(0..^(𝐿 − (♯‘𝑊)))) · (♯‘{𝐶})) = ((𝐿 − (♯‘𝑊)) · 1)) |
19 | 12 | nn0cnd 12152 | . . 3 ⊢ (𝜑 → (𝐿 − (♯‘𝑊)) ∈ ℂ) |
20 | 19 | mulid1d 10850 | . 2 ⊢ (𝜑 → ((𝐿 − (♯‘𝑊)) · 1) = (𝐿 − (♯‘𝑊))) |
21 | 5, 18, 20 | 3eqtrd 2781 | 1 ⊢ (𝜑 → (♯‘((0..^(𝐿 − (♯‘𝑊))) × {𝐶})) = (𝐿 − (♯‘𝑊))) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 = wceq 1543 ∈ wcel 2110 {csn 4541 class class class wbr 5053 × cxp 5549 ‘cfv 6380 (class class class)co 7213 Fincfn 8626 0cc0 10729 1c1 10730 · cmul 10734 ≤ cle 10868 − cmin 11062 ℕ0cn0 12090 ..^cfzo 13238 ♯chash 13896 Word cword 14069 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1803 ax-4 1817 ax-5 1918 ax-6 1976 ax-7 2016 ax-8 2112 ax-9 2120 ax-10 2141 ax-11 2158 ax-12 2175 ax-ext 2708 ax-rep 5179 ax-sep 5192 ax-nul 5199 ax-pow 5258 ax-pr 5322 ax-un 7523 ax-cnex 10785 ax-resscn 10786 ax-1cn 10787 ax-icn 10788 ax-addcl 10789 ax-addrcl 10790 ax-mulcl 10791 ax-mulrcl 10792 ax-mulcom 10793 ax-addass 10794 ax-mulass 10795 ax-distr 10796 ax-i2m1 10797 ax-1ne0 10798 ax-1rid 10799 ax-rnegex 10800 ax-rrecex 10801 ax-cnre 10802 ax-pre-lttri 10803 ax-pre-lttrn 10804 ax-pre-ltadd 10805 ax-pre-mulgt0 10806 |
This theorem depends on definitions: df-bi 210 df-an 400 df-or 848 df-3or 1090 df-3an 1091 df-tru 1546 df-fal 1556 df-ex 1788 df-nf 1792 df-sb 2071 df-mo 2539 df-eu 2568 df-clab 2715 df-cleq 2729 df-clel 2816 df-nfc 2886 df-ne 2941 df-nel 3047 df-ral 3066 df-rex 3067 df-reu 3068 df-rab 3070 df-v 3410 df-sbc 3695 df-csb 3812 df-dif 3869 df-un 3871 df-in 3873 df-ss 3883 df-pss 3885 df-nul 4238 df-if 4440 df-pw 4515 df-sn 4542 df-pr 4544 df-tp 4546 df-op 4548 df-uni 4820 df-int 4860 df-iun 4906 df-br 5054 df-opab 5116 df-mpt 5136 df-tr 5162 df-id 5455 df-eprel 5460 df-po 5468 df-so 5469 df-fr 5509 df-we 5511 df-xp 5557 df-rel 5558 df-cnv 5559 df-co 5560 df-dm 5561 df-rn 5562 df-res 5563 df-ima 5564 df-pred 6160 df-ord 6216 df-on 6217 df-lim 6218 df-suc 6219 df-iota 6338 df-fun 6382 df-fn 6383 df-f 6384 df-f1 6385 df-fo 6386 df-f1o 6387 df-fv 6388 df-riota 7170 df-ov 7216 df-oprab 7217 df-mpo 7218 df-om 7645 df-1st 7761 df-2nd 7762 df-wrecs 8047 df-recs 8108 df-rdg 8146 df-1o 8202 df-oadd 8206 df-er 8391 df-en 8627 df-dom 8628 df-sdom 8629 df-fin 8630 df-dju 9517 df-card 9555 df-pnf 10869 df-mnf 10870 df-xr 10871 df-ltxr 10872 df-le 10873 df-sub 11064 df-neg 11065 df-nn 11831 df-n0 12091 df-z 12177 df-uz 12439 df-fz 13096 df-fzo 13239 df-hash 13897 df-word 14070 |
This theorem is referenced by: lpadlen2 32373 lpadleft 32375 lpadright 32376 |
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