| Mathbox for Thierry Arnoux |
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| Mirrors > Home > MPE Home > Th. List > Mathboxes > fzto1stinvn | Structured version Visualization version GIF version | ||
| Description: Value of the inverse of our permutation 𝑃 at 𝐼. (Contributed by Thierry Arnoux, 23-Aug-2020.) |
| Ref | Expression |
|---|---|
| psgnfzto1st.d | ⊢ 𝐷 = (1...𝑁) |
| psgnfzto1st.p | ⊢ 𝑃 = (𝑖 ∈ 𝐷 ↦ if(𝑖 = 1, 𝐼, if(𝑖 ≤ 𝐼, (𝑖 − 1), 𝑖))) |
| psgnfzto1st.g | ⊢ 𝐺 = (SymGrp‘𝐷) |
| psgnfzto1st.b | ⊢ 𝐵 = (Base‘𝐺) |
| Ref | Expression |
|---|---|
| fzto1stinvn | ⊢ (𝐼 ∈ 𝐷 → (◡𝑃‘𝐼) = 1) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | psgnfzto1st.d | . . . 4 ⊢ 𝐷 = (1...𝑁) | |
| 2 | psgnfzto1st.p | . . . 4 ⊢ 𝑃 = (𝑖 ∈ 𝐷 ↦ if(𝑖 = 1, 𝐼, if(𝑖 ≤ 𝐼, (𝑖 − 1), 𝑖))) | |
| 3 | 1, 2 | fzto1stfv1 33391 | . . 3 ⊢ (𝐼 ∈ 𝐷 → (𝑃‘1) = 𝐼) |
| 4 | 3 | fveq2d 6889 | . 2 ⊢ (𝐼 ∈ 𝐷 → (◡𝑃‘(𝑃‘1)) = (◡𝑃‘𝐼)) |
| 5 | psgnfzto1st.g | . . . . 5 ⊢ 𝐺 = (SymGrp‘𝐷) | |
| 6 | psgnfzto1st.b | . . . . 5 ⊢ 𝐵 = (Base‘𝐺) | |
| 7 | 1, 2, 5, 6 | fzto1st 33393 | . . . 4 ⊢ (𝐼 ∈ 𝐷 → 𝑃 ∈ 𝐵) |
| 8 | 5, 6 | symgbasf1o 19448 | . . . 4 ⊢ (𝑃 ∈ 𝐵 → 𝑃:𝐷–1-1-onto→𝐷) |
| 9 | 7, 8 | syl 18 | . . 3 ⊢ (𝐼 ∈ 𝐷 → 𝑃:𝐷–1-1-onto→𝐷) |
| 10 | elfzuz2 13560 | . . . . 5 ⊢ (𝐼 ∈ (1...𝑁) → 𝑁 ∈ (ℤ≥‘1)) | |
| 11 | 10, 1 | eleq2s 2888 | . . . 4 ⊢ (𝐼 ∈ 𝐷 → 𝑁 ∈ (ℤ≥‘1)) |
| 12 | eluzfz1 13562 | . . . . 5 ⊢ (𝑁 ∈ (ℤ≥‘1) → 1 ∈ (1...𝑁)) | |
| 13 | 12, 1 | eleqtrrdi 2881 | . . . 4 ⊢ (𝑁 ∈ (ℤ≥‘1) → 1 ∈ 𝐷) |
| 14 | 11, 13 | syl 18 | . . 3 ⊢ (𝐼 ∈ 𝐷 → 1 ∈ 𝐷) |
| 15 | f1ocnvfv1 7278 | . . 3 ⊢ ((𝑃:𝐷–1-1-onto→𝐷 ∧ 1 ∈ 𝐷) → (◡𝑃‘(𝑃‘1)) = 1) | |
| 16 | 9, 14, 15 | syl2anc 595 | . 2 ⊢ (𝐼 ∈ 𝐷 → (◡𝑃‘(𝑃‘1)) = 1) |
| 17 | 4, 16 | eqtr3d 2807 | 1 ⊢ (𝐼 ∈ 𝐷 → (◡𝑃‘𝐼) = 1) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 = wceq 1568 ∈ wcel 2150 ifcif 4492 class class class wbr 5114 ↦ cmpt 5197 ◡ccnv 5664 –1-1-onto→wf1o 6539 ‘cfv 6540 (class class class)co 7414 1c1 11104 ≤ cle 11247 − cmin 11444 ℤ≥cuz 12865 ...cfz 13538 Basecbs 17272 SymGrpcsymg 19442 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1823 ax-4 1837 ax-5 1938 ax-6 1995 ax-7 2036 ax-8 2152 ax-9 2160 ax-10 2183 ax-11 2199 ax-12 2220 ax-ext 2742 ax-rep 5243 ax-sep 5262 ax-nul 5274 ax-pow 5340 ax-pr 5408 ax-un 7736 ax-cnex 11159 ax-resscn 11160 ax-1cn 11161 ax-icn 11162 ax-addcl 11163 ax-addrcl 11164 ax-mulcl 11165 ax-mulrcl 11166 ax-mulcom 11167 ax-addass 11168 ax-mulass 11169 ax-distr 11170 ax-i2m1 11171 ax-1ne0 11172 ax-1rid 11173 ax-rnegex 11174 ax-rrecex 11175 ax-cnre 11176 ax-pre-lttri 11177 ax-pre-lttrn 11178 ax-pre-ltadd 11179 ax-pre-mulgt0 11180 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3or 1102 df-3an 1103 df-tru 1571 df-fal 1581 df-ex 1808 df-nf 1812 df-sb 2099 df-mo 2574 df-eu 2604 df-clab 2749 df-cleq 2762 df-clel 2845 df-nfc 2919 df-ne 2966 df-nel 3072 df-ral 3087 df-rex 3097 df-reu 3377 df-rab 3424 df-v 3464 df-sbc 3753 df-csb 3862 df-dif 3916 df-un 3918 df-in 3920 df-ss 3930 df-pss 3933 df-nul 4295 df-if 4493 df-pw 4569 df-sn 4595 df-pr 4597 df-tp 4599 df-op 4601 df-uni 4878 df-iun 4963 df-br 5115 df-opab 5179 df-mpt 5198 df-tr 5224 df-id 5560 df-eprel 5565 df-po 5573 df-so 5574 df-fr 5618 df-we 5620 df-xp 5671 df-rel 5672 df-cnv 5673 df-co 5674 df-dm 5675 df-rn 5676 df-res 5677 df-ima 5678 df-pred 6306 df-ord 6367 df-on 6368 df-lim 6369 df-suc 6370 df-iota 6496 df-fun 6542 df-fn 6543 df-f 6544 df-f1 6545 df-fo 6546 df-f1o 6547 df-fv 6548 df-riota 7371 df-ov 7417 df-oprab 7418 df-mpo 7419 df-om 7866 df-1st 7989 df-2nd 7990 df-frecs 8281 df-wrecs 8312 df-recs 8361 df-rdg 8400 df-1o 8456 df-2o 8457 df-er 8697 df-map 8829 df-en 8947 df-dom 8948 df-sdom 8949 df-fin 8950 df-pnf 11248 df-mnf 11249 df-xr 11250 df-ltxr 11251 df-le 11252 df-sub 11446 df-neg 11447 df-nn 12237 df-2 12306 df-3 12307 df-4 12308 df-5 12309 df-6 12310 df-7 12311 df-8 12312 df-9 12313 df-n0 12508 df-z 12595 df-uz 12866 df-fz 13539 df-struct 17210 df-sets 17227 df-slot 17245 df-ndx 17257 df-base 17273 df-ress 17294 df-plusg 17326 df-tset 17332 df-efmnd 18931 df-symg 19443 df-pmtr 19515 |
| This theorem is referenced by: madjusmdetlem4 34190 |
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