| Mathbox for Thierry Arnoux |
< Previous
Next >
Nearby theorems |
||
| Mirrors > Home > MPE Home > Th. List > Mathboxes > deg1le0eq0 | Structured version Visualization version GIF version | ||
| Description: A polynomial with nonpositive degree is the zero polynomial iff its constant term is zero. Biconditional version of deg1scl 26100. (Contributed by Thierry Arnoux, 22-Mar-2025.) |
| Ref | Expression |
|---|---|
| deg1sclb.d | ⊢ 𝐷 = (deg1‘𝑅) |
| deg1sclb.p | ⊢ 𝑃 = (Poly1‘𝑅) |
| deg1sclb.z | ⊢ 0 = (0g‘𝑅) |
| deg1sclb.1 | ⊢ 𝐵 = (Base‘𝑃) |
| deg1sclb.2 | ⊢ 𝑂 = (0g‘𝑃) |
| deg1sclb.3 | ⊢ (𝜑 → 𝑅 ∈ Ring) |
| deg1sclb.4 | ⊢ (𝜑 → 𝐹 ∈ 𝐵) |
| deg1sclb.5 | ⊢ (𝜑 → (𝐷‘𝐹) ≤ 0) |
| Ref | Expression |
|---|---|
| deg1le0eq0 | ⊢ (𝜑 → (𝐹 = 𝑂 ↔ ((coe1‘𝐹)‘0) = 0 )) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | deg1sclb.3 | . . . . . 6 ⊢ (𝜑 → 𝑅 ∈ Ring) | |
| 2 | deg1sclb.4 | . . . . . 6 ⊢ (𝜑 → 𝐹 ∈ 𝐵) | |
| 3 | deg1sclb.5 | . . . . . 6 ⊢ (𝜑 → (𝐷‘𝐹) ≤ 0) | |
| 4 | deg1sclb.d | . . . . . . . 8 ⊢ 𝐷 = (deg1‘𝑅) | |
| 5 | deg1sclb.p | . . . . . . . 8 ⊢ 𝑃 = (Poly1‘𝑅) | |
| 6 | deg1sclb.1 | . . . . . . . 8 ⊢ 𝐵 = (Base‘𝑃) | |
| 7 | eqid 2741 | . . . . . . . 8 ⊢ (algSc‘𝑃) = (algSc‘𝑃) | |
| 8 | 4, 5, 6, 7 | deg1le0 26098 | . . . . . . 7 ⊢ ((𝑅 ∈ Ring ∧ 𝐹 ∈ 𝐵) → ((𝐷‘𝐹) ≤ 0 ↔ 𝐹 = ((algSc‘𝑃)‘((coe1‘𝐹)‘0)))) |
| 9 | 8 | biimpa 478 | . . . . . 6 ⊢ (((𝑅 ∈ Ring ∧ 𝐹 ∈ 𝐵) ∧ (𝐷‘𝐹) ≤ 0) → 𝐹 = ((algSc‘𝑃)‘((coe1‘𝐹)‘0))) |
| 10 | 1, 2, 3, 9 | syl21anc 844 | . . . . 5 ⊢ (𝜑 → 𝐹 = ((algSc‘𝑃)‘((coe1‘𝐹)‘0))) |
| 11 | 10 | adantr 482 | . . . 4 ⊢ ((𝜑 ∧ 𝐹 = 𝑂) → 𝐹 = ((algSc‘𝑃)‘((coe1‘𝐹)‘0))) |
| 12 | simpr 486 | . . . 4 ⊢ ((𝜑 ∧ 𝐹 = 𝑂) → 𝐹 = 𝑂) | |
| 13 | 11, 12 | eqtr3d 2778 | . . 3 ⊢ ((𝜑 ∧ 𝐹 = 𝑂) → ((algSc‘𝑃)‘((coe1‘𝐹)‘0)) = 𝑂) |
| 14 | 1 | adantr 482 | . . . . . . 7 ⊢ ((𝜑 ∧ ((coe1‘𝐹)‘0) ≠ 0 ) → 𝑅 ∈ Ring) |
| 15 | 0nn0 12447 | . . . . . . . . 9 ⊢ 0 ∈ ℕ0 | |
| 16 | eqid 2741 | . . . . . . . . . 10 ⊢ (coe1‘𝐹) = (coe1‘𝐹) | |
| 17 | eqid 2741 | . . . . . . . . . 10 ⊢ (Base‘𝑅) = (Base‘𝑅) | |
| 18 | 16, 6, 5, 17 | coe1fvalcl 22201 | . . . . . . . . 9 ⊢ ((𝐹 ∈ 𝐵 ∧ 0 ∈ ℕ0) → ((coe1‘𝐹)‘0) ∈ (Base‘𝑅)) |
| 19 | 2, 15, 18 | sylancl 593 | . . . . . . . 8 ⊢ (𝜑 → ((coe1‘𝐹)‘0) ∈ (Base‘𝑅)) |
| 20 | 19 | adantr 482 | . . . . . . 7 ⊢ ((𝜑 ∧ ((coe1‘𝐹)‘0) ≠ 0 ) → ((coe1‘𝐹)‘0) ∈ (Base‘𝑅)) |
| 21 | simpr 486 | . . . . . . 7 ⊢ ((𝜑 ∧ ((coe1‘𝐹)‘0) ≠ 0 ) → ((coe1‘𝐹)‘0) ≠ 0 ) | |
| 22 | deg1sclb.z | . . . . . . . 8 ⊢ 0 = (0g‘𝑅) | |
| 23 | deg1sclb.2 | . . . . . . . 8 ⊢ 𝑂 = (0g‘𝑃) | |
| 24 | 5, 7, 22, 23, 17 | ply1scln0 22281 | . . . . . . 7 ⊢ ((𝑅 ∈ Ring ∧ ((coe1‘𝐹)‘0) ∈ (Base‘𝑅) ∧ ((coe1‘𝐹)‘0) ≠ 0 ) → ((algSc‘𝑃)‘((coe1‘𝐹)‘0)) ≠ 𝑂) |
| 25 | 14, 20, 21, 24 | syl3anc 1380 | . . . . . 6 ⊢ ((𝜑 ∧ ((coe1‘𝐹)‘0) ≠ 0 ) → ((algSc‘𝑃)‘((coe1‘𝐹)‘0)) ≠ 𝑂) |
| 26 | 25 | ex 414 | . . . . 5 ⊢ (𝜑 → (((coe1‘𝐹)‘0) ≠ 0 → ((algSc‘𝑃)‘((coe1‘𝐹)‘0)) ≠ 𝑂)) |
| 27 | 26 | necon4d 2960 | . . . 4 ⊢ (𝜑 → (((algSc‘𝑃)‘((coe1‘𝐹)‘0)) = 𝑂 → ((coe1‘𝐹)‘0) = 0 )) |
| 28 | 27 | imp 408 | . . 3 ⊢ ((𝜑 ∧ ((algSc‘𝑃)‘((coe1‘𝐹)‘0)) = 𝑂) → ((coe1‘𝐹)‘0) = 0 ) |
| 29 | 13, 28 | syldan 598 | . 2 ⊢ ((𝜑 ∧ 𝐹 = 𝑂) → ((coe1‘𝐹)‘0) = 0 ) |
| 30 | 10 | adantr 482 | . . 3 ⊢ ((𝜑 ∧ ((coe1‘𝐹)‘0) = 0 ) → 𝐹 = ((algSc‘𝑃)‘((coe1‘𝐹)‘0))) |
| 31 | simpr 486 | . . . 4 ⊢ ((𝜑 ∧ ((coe1‘𝐹)‘0) = 0 ) → ((coe1‘𝐹)‘0) = 0 ) | |
| 32 | 31 | fveq2d 6835 | . . 3 ⊢ ((𝜑 ∧ ((coe1‘𝐹)‘0) = 0 ) → ((algSc‘𝑃)‘((coe1‘𝐹)‘0)) = ((algSc‘𝑃)‘ 0 )) |
| 33 | 5, 7, 22, 23, 1 | ply1ascl0 22243 | . . . 4 ⊢ (𝜑 → ((algSc‘𝑃)‘ 0 ) = 𝑂) |
| 34 | 33 | adantr 482 | . . 3 ⊢ ((𝜑 ∧ ((coe1‘𝐹)‘0) = 0 ) → ((algSc‘𝑃)‘ 0 ) = 𝑂) |
| 35 | 30, 32, 34 | 3eqtrd 2780 | . 2 ⊢ ((𝜑 ∧ ((coe1‘𝐹)‘0) = 0 ) → 𝐹 = 𝑂) |
| 36 | 29, 35 | impbida 807 | 1 ⊢ (𝜑 → (𝐹 = 𝑂 ↔ ((coe1‘𝐹)‘0) = 0 )) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ↔ wb 208 ∧ wa 397 = wceq 1548 ∈ wcel 2121 ≠ wne 2936 class class class wbr 5075 ‘cfv 6489 0cc0 11033 ≤ cle 11175 ℕ0cn0 12432 Basecbs 17174 0gc0g 17397 Ringcrg 20209 algSccascl 21831 Poly1cpl1 22166 coe1cco1 22167 deg1cdg1 26041 |
| 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 1975 ax-7 2016 ax-8 2123 ax-9 2131 ax-10 2154 ax-11 2170 ax-12 2191 ax-ext 2713 ax-rep 5202 ax-sep 5221 ax-nul 5231 ax-pow 5297 ax-pr 5365 ax-un 7682 ax-cnex 11089 ax-resscn 11090 ax-1cn 11091 ax-icn 11092 ax-addcl 11093 ax-addrcl 11094 ax-mulcl 11095 ax-mulrcl 11096 ax-mulcom 11097 ax-addass 11098 ax-mulass 11099 ax-distr 11100 ax-i2m1 11101 ax-1ne0 11102 ax-1rid 11103 ax-rnegex 11104 ax-rrecex 11105 ax-cnre 11106 ax-pre-lttri 11107 ax-pre-lttrn 11108 ax-pre-ltadd 11109 ax-pre-mulgt0 11110 ax-pre-sup 11111 ax-addf 11112 |
| This theorem depends on definitions: df-bi 209 df-an 398 df-or 855 df-3or 1094 df-3an 1095 df-tru 1551 df-fal 1561 df-ex 1788 df-nf 1792 df-sb 2075 df-mo 2545 df-eu 2575 df-clab 2720 df-cleq 2733 df-clel 2816 df-nfc 2890 df-ne 2937 df-nel 3041 df-ral 3056 df-rex 3066 df-rmo 3346 df-reu 3347 df-rab 3394 df-v 3435 df-sbc 3726 df-csb 3834 df-dif 3888 df-un 3890 df-in 3892 df-ss 3902 df-pss 3905 df-nul 4265 df-if 4458 df-pw 4534 df-sn 4559 df-pr 4561 df-tp 4563 df-op 4565 df-uni 4842 df-int 4881 df-iun 4926 df-iin 4927 df-br 5076 df-opab 5138 df-mpt 5157 df-tr 5183 df-id 5516 df-eprel 5521 df-po 5529 df-so 5530 df-fr 5574 df-se 5575 df-we 5576 df-xp 5627 df-rel 5628 df-cnv 5629 df-co 5630 df-dm 5631 df-rn 5632 df-res 5633 df-ima 5634 df-pred 6256 df-ord 6317 df-on 6318 df-lim 6319 df-suc 6320 df-iota 6445 df-fun 6491 df-fn 6492 df-f 6493 df-f1 6494 df-fo 6495 df-f1o 6496 df-fv 6497 df-isom 6498 df-riota 7317 df-ov 7363 df-oprab 7364 df-mpo 7365 df-of 7624 df-ofr 7625 df-om 7811 df-1st 7935 df-2nd 7936 df-supp 8105 df-frecs 8225 df-wrecs 8256 df-recs 8305 df-rdg 8343 df-1o 8399 df-2o 8400 df-er 8637 df-map 8769 df-pm 8770 df-ixp 8840 df-en 8888 df-dom 8889 df-sdom 8890 df-fin 8891 df-fsupp 9269 df-sup 9349 df-oi 9419 df-card 9858 df-pnf 11176 df-mnf 11177 df-xr 11178 df-ltxr 11179 df-le 11180 df-sub 11374 df-neg 11375 df-nn 12170 df-2 12239 df-3 12240 df-4 12241 df-5 12242 df-6 12243 df-7 12244 df-8 12245 df-9 12246 df-n0 12433 df-z 12520 df-dec 12640 df-uz 12784 df-fz 13457 df-fzo 13604 df-seq 13959 df-hash 14288 df-struct 17112 df-sets 17129 df-slot 17147 df-ndx 17159 df-base 17175 df-ress 17196 df-plusg 17228 df-mulr 17229 df-starv 17230 df-sca 17231 df-vsca 17232 df-ip 17233 df-tset 17234 df-ple 17235 df-ds 17237 df-unif 17238 df-hom 17239 df-cco 17240 df-0g 17399 df-gsum 17400 df-prds 17405 df-pws 17407 df-mre 17543 df-mrc 17544 df-acs 17546 df-mgm 18603 df-sgrp 18682 df-mnd 18698 df-mhm 18746 df-submnd 18747 df-grp 18907 df-minusg 18908 df-sbg 18909 df-mulg 19039 df-subg 19094 df-ghm 19183 df-cntz 19287 df-cmn 19752 df-abl 19753 df-mgp 20117 df-rng 20129 df-ur 20158 df-ring 20211 df-cring 20212 df-subrng 20522 df-subrg 20546 df-lmod 20856 df-lss 20926 df-cnfld 21352 df-ascl 21834 df-psr 21888 df-mvr 21889 df-mpl 21890 df-opsr 21892 df-psr1 22169 df-vr1 22170 df-ply1 22171 df-coe1 22172 df-mdeg 26042 df-deg1 26043 |
| This theorem is referenced by: ply1unit 33670 m1pmeq 33680 minplyirredlem 33906 |
| Copyright terms: Public domain | W3C validator |