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| 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 26241. (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 2769 | . . . . . . . 8 ⊢ (algSc‘𝑃) = (algSc‘𝑃) | |
| 8 | 4, 5, 6, 7 | deg1le0 26239 | . . . . . . 7 ⊢ ((𝑅 ∈ Ring ∧ 𝐹 ∈ 𝐵) → ((𝐷‘𝐹) ≤ 0 ↔ 𝐹 = ((algSc‘𝑃)‘((coe1‘𝐹)‘0)))) |
| 9 | 8 | biimpa 481 | . . . . . 6 ⊢ (((𝑅 ∈ Ring ∧ 𝐹 ∈ 𝐵) ∧ (𝐷‘𝐹) ≤ 0) → 𝐹 = ((algSc‘𝑃)‘((coe1‘𝐹)‘0))) |
| 10 | 1, 2, 3, 9 | syl21anc 850 | . . . . 5 ⊢ (𝜑 → 𝐹 = ((algSc‘𝑃)‘((coe1‘𝐹)‘0))) |
| 11 | 10 | adantr 485 | . . . 4 ⊢ ((𝜑 ∧ 𝐹 = 𝑂) → 𝐹 = ((algSc‘𝑃)‘((coe1‘𝐹)‘0))) |
| 12 | simpr 489 | . . . 4 ⊢ ((𝜑 ∧ 𝐹 = 𝑂) → 𝐹 = 𝑂) | |
| 13 | 11, 12 | eqtr3d 2806 | . . 3 ⊢ ((𝜑 ∧ 𝐹 = 𝑂) → ((algSc‘𝑃)‘((coe1‘𝐹)‘0)) = 𝑂) |
| 14 | 1 | adantr 485 | . . . . . . 7 ⊢ ((𝜑 ∧ ((coe1‘𝐹)‘0) ≠ 0 ) → 𝑅 ∈ Ring) |
| 15 | 0nn0 12521 | . . . . . . . . 9 ⊢ 0 ∈ ℕ0 | |
| 16 | eqid 2769 | . . . . . . . . . 10 ⊢ (coe1‘𝐹) = (coe1‘𝐹) | |
| 17 | eqid 2769 | . . . . . . . . . 10 ⊢ (Base‘𝑅) = (Base‘𝑅) | |
| 18 | 16, 6, 5, 17 | coe1fvalcl 22343 | . . . . . . . . 9 ⊢ ((𝐹 ∈ 𝐵 ∧ 0 ∈ ℕ0) → ((coe1‘𝐹)‘0) ∈ (Base‘𝑅)) |
| 19 | 2, 15, 18 | sylancl 597 | . . . . . . . 8 ⊢ (𝜑 → ((coe1‘𝐹)‘0) ∈ (Base‘𝑅)) |
| 20 | 19 | adantr 485 | . . . . . . 7 ⊢ ((𝜑 ∧ ((coe1‘𝐹)‘0) ≠ 0 ) → ((coe1‘𝐹)‘0) ∈ (Base‘𝑅)) |
| 21 | simpr 489 | . . . . . . 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 22423 | . . . . . . 7 ⊢ ((𝑅 ∈ Ring ∧ ((coe1‘𝐹)‘0) ∈ (Base‘𝑅) ∧ ((coe1‘𝐹)‘0) ≠ 0 ) → ((algSc‘𝑃)‘((coe1‘𝐹)‘0)) ≠ 𝑂) |
| 25 | 14, 20, 21, 24 | syl3anc 1396 | . . . . . 6 ⊢ ((𝜑 ∧ ((coe1‘𝐹)‘0) ≠ 0 ) → ((algSc‘𝑃)‘((coe1‘𝐹)‘0)) ≠ 𝑂) |
| 26 | 25 | ex 417 | . . . . 5 ⊢ (𝜑 → (((coe1‘𝐹)‘0) ≠ 0 → ((algSc‘𝑃)‘((coe1‘𝐹)‘0)) ≠ 𝑂)) |
| 27 | 26 | necon4d 2988 | . . . 4 ⊢ (𝜑 → (((algSc‘𝑃)‘((coe1‘𝐹)‘0)) = 𝑂 → ((coe1‘𝐹)‘0) = 0 )) |
| 28 | 27 | imp 411 | . . 3 ⊢ ((𝜑 ∧ ((algSc‘𝑃)‘((coe1‘𝐹)‘0)) = 𝑂) → ((coe1‘𝐹)‘0) = 0 ) |
| 29 | 13, 28 | syldan 602 | . 2 ⊢ ((𝜑 ∧ 𝐹 = 𝑂) → ((coe1‘𝐹)‘0) = 0 ) |
| 30 | 10 | adantr 485 | . . 3 ⊢ ((𝜑 ∧ ((coe1‘𝐹)‘0) = 0 ) → 𝐹 = ((algSc‘𝑃)‘((coe1‘𝐹)‘0))) |
| 31 | simpr 489 | . . . 4 ⊢ ((𝜑 ∧ ((coe1‘𝐹)‘0) = 0 ) → ((coe1‘𝐹)‘0) = 0 ) | |
| 32 | 31 | fveq2d 6888 | . . 3 ⊢ ((𝜑 ∧ ((coe1‘𝐹)‘0) = 0 ) → ((algSc‘𝑃)‘((coe1‘𝐹)‘0)) = ((algSc‘𝑃)‘ 0 )) |
| 33 | 5, 7, 22, 23, 1 | ply1ascl0 22385 | . . . 4 ⊢ (𝜑 → ((algSc‘𝑃)‘ 0 ) = 𝑂) |
| 34 | 33 | adantr 485 | . . 3 ⊢ ((𝜑 ∧ ((coe1‘𝐹)‘0) = 0 ) → ((algSc‘𝑃)‘ 0 ) = 𝑂) |
| 35 | 30, 32, 34 | 3eqtrd 2808 | . 2 ⊢ ((𝜑 ∧ ((coe1‘𝐹)‘0) = 0 ) → 𝐹 = 𝑂) |
| 36 | 29, 35 | impbida 812 | 1 ⊢ (𝜑 → (𝐹 = 𝑂 ↔ ((coe1‘𝐹)‘0) = 0 )) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ↔ wb 209 ∧ wa 400 = wceq 1567 ∈ wcel 2149 ≠ wne 2964 class class class wbr 5113 ‘cfv 6539 0cc0 11102 ≤ cle 11246 ℕ0cn0 12506 Basecbs 17271 0gc0g 17494 Ringcrg 20317 algSccascl 21973 Poly1cpl1 22308 coe1cco1 22309 deg1cdg1 26182 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1822 ax-4 1836 ax-5 1937 ax-6 1994 ax-7 2035 ax-8 2151 ax-9 2159 ax-10 2182 ax-11 2198 ax-12 2219 ax-ext 2741 ax-rep 5242 ax-sep 5261 ax-nul 5273 ax-pow 5339 ax-pr 5407 ax-un 7735 ax-cnex 11158 ax-resscn 11159 ax-1cn 11160 ax-icn 11161 ax-addcl 11162 ax-addrcl 11163 ax-mulcl 11164 ax-mulrcl 11165 ax-mulcom 11166 ax-addass 11167 ax-mulass 11168 ax-distr 11169 ax-i2m1 11170 ax-1ne0 11171 ax-1rid 11172 ax-rnegex 11173 ax-rrecex 11174 ax-cnre 11175 ax-pre-lttri 11176 ax-pre-lttrn 11177 ax-pre-ltadd 11178 ax-pre-mulgt0 11179 ax-pre-sup 11180 ax-addf 11181 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3or 1102 df-3an 1103 df-tru 1570 df-fal 1580 df-ex 1807 df-nf 1811 df-sb 2098 df-mo 2573 df-eu 2603 df-clab 2748 df-cleq 2761 df-clel 2844 df-nfc 2918 df-ne 2965 df-nel 3071 df-ral 3086 df-rex 3096 df-rmo 3376 df-reu 3377 df-rab 3424 df-v 3465 df-sbc 3754 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 4877 df-int 4917 df-iun 4962 df-iin 4963 df-br 5114 df-opab 5178 df-mpt 5197 df-tr 5223 df-id 5559 df-eprel 5564 df-po 5572 df-so 5573 df-fr 5617 df-se 5618 df-we 5619 df-xp 5670 df-rel 5671 df-cnv 5672 df-co 5673 df-dm 5674 df-rn 5675 df-res 5676 df-ima 5677 df-pred 6305 df-ord 6366 df-on 6367 df-lim 6368 df-suc 6369 df-iota 6495 df-fun 6541 df-fn 6542 df-f 6543 df-f1 6544 df-fo 6545 df-f1o 6546 df-fv 6547 df-isom 6548 df-riota 7370 df-ov 7416 df-oprab 7417 df-mpo 7418 df-of 7677 df-ofr 7678 df-om 7865 df-1st 7988 df-2nd 7989 df-supp 8159 df-frecs 8280 df-wrecs 8311 df-recs 8360 df-rdg 8399 df-1o 8455 df-2o 8456 df-er 8696 df-map 8828 df-pm 8829 df-ixp 8898 df-en 8946 df-dom 8947 df-sdom 8948 df-fin 8949 df-fsupp 9324 df-sup 9404 df-oi 9474 df-card 9927 df-pnf 11247 df-mnf 11248 df-xr 11249 df-ltxr 11250 df-le 11251 df-sub 11445 df-neg 11446 df-nn 12236 df-2 12305 df-3 12306 df-4 12307 df-5 12308 df-6 12309 df-7 12310 df-8 12311 df-9 12312 df-n0 12507 df-z 12594 df-dec 12714 df-uz 12865 df-fz 13538 df-fzo 13685 df-seq 14040 df-hash 14369 df-struct 17209 df-sets 17226 df-slot 17244 df-ndx 17256 df-base 17272 df-ress 17293 df-plusg 17325 df-mulr 17326 df-starv 17327 df-sca 17328 df-vsca 17329 df-ip 17330 df-tset 17331 df-ple 17332 df-ds 17334 df-unif 17335 df-hom 17336 df-cco 17337 df-0g 17496 df-gsum 17497 df-prds 17502 df-pws 17504 df-mre 17640 df-mrc 17641 df-acs 17643 df-mgm 18700 df-sgrp 18779 df-mnd 18795 df-mhm 18843 df-submnd 18844 df-grp 19005 df-minusg 19006 df-sbg 19007 df-mulg 19136 df-subg 19191 df-ghm 19286 df-cntz 19389 df-cmn 19854 df-abl 19855 df-mgp 20219 df-rng 20233 df-ur 20266 df-ring 20319 df-cring 20320 df-subrng 20633 df-subrg 20657 df-lmod 20963 df-lss 21033 df-cnfld 21494 df-ascl 21976 df-psr 22030 df-mvr 22031 df-mpl 22032 df-opsr 22034 df-psr1 22311 df-vr1 22312 df-ply1 22313 df-coe1 22314 df-mdeg 26183 df-deg1 26184 |
| This theorem is referenced by: ply1unit 33812 m1pmeq 33822 minplyirredlem 34047 |
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