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Mirrors > Home > MPE Home > Th. List > deg1lt | Structured version Visualization version GIF version |
Description: If the degree of a univariate polynomial is less than some index, then that coefficient must be zero. (Contributed by Stefan O'Rear, 23-Mar-2015.) |
Ref | Expression |
---|---|
deg1leb.d | ⊢ 𝐷 = ( deg1 ‘𝑅) |
deg1leb.p | ⊢ 𝑃 = (Poly1‘𝑅) |
deg1leb.b | ⊢ 𝐵 = (Base‘𝑃) |
deg1leb.y | ⊢ 0 = (0g‘𝑅) |
deg1leb.a | ⊢ 𝐴 = (coe1‘𝐹) |
Ref | Expression |
---|---|
deg1lt | ⊢ ((𝐹 ∈ 𝐵 ∧ 𝐺 ∈ ℕ0 ∧ (𝐷‘𝐹) < 𝐺) → (𝐴‘𝐺) = 0 ) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | simp3 1137 | . 2 ⊢ ((𝐹 ∈ 𝐵 ∧ 𝐺 ∈ ℕ0 ∧ (𝐷‘𝐹) < 𝐺) → (𝐷‘𝐹) < 𝐺) | |
2 | breq2 5077 | . . . 4 ⊢ (𝑥 = 𝐺 → ((𝐷‘𝐹) < 𝑥 ↔ (𝐷‘𝐹) < 𝐺)) | |
3 | fveqeq2 6775 | . . . 4 ⊢ (𝑥 = 𝐺 → ((𝐴‘𝑥) = 0 ↔ (𝐴‘𝐺) = 0 )) | |
4 | 2, 3 | imbi12d 345 | . . 3 ⊢ (𝑥 = 𝐺 → (((𝐷‘𝐹) < 𝑥 → (𝐴‘𝑥) = 0 ) ↔ ((𝐷‘𝐹) < 𝐺 → (𝐴‘𝐺) = 0 ))) |
5 | deg1leb.d | . . . . . . 7 ⊢ 𝐷 = ( deg1 ‘𝑅) | |
6 | deg1leb.p | . . . . . . 7 ⊢ 𝑃 = (Poly1‘𝑅) | |
7 | deg1leb.b | . . . . . . 7 ⊢ 𝐵 = (Base‘𝑃) | |
8 | 5, 6, 7 | deg1xrcl 25257 | . . . . . 6 ⊢ (𝐹 ∈ 𝐵 → (𝐷‘𝐹) ∈ ℝ*) |
9 | 8 | 3ad2ant1 1132 | . . . . 5 ⊢ ((𝐹 ∈ 𝐵 ∧ 𝐺 ∈ ℕ0 ∧ (𝐷‘𝐹) < 𝐺) → (𝐷‘𝐹) ∈ ℝ*) |
10 | 9 | xrleidd 12896 | . . . 4 ⊢ ((𝐹 ∈ 𝐵 ∧ 𝐺 ∈ ℕ0 ∧ (𝐷‘𝐹) < 𝐺) → (𝐷‘𝐹) ≤ (𝐷‘𝐹)) |
11 | simp1 1135 | . . . . 5 ⊢ ((𝐹 ∈ 𝐵 ∧ 𝐺 ∈ ℕ0 ∧ (𝐷‘𝐹) < 𝐺) → 𝐹 ∈ 𝐵) | |
12 | deg1leb.y | . . . . . 6 ⊢ 0 = (0g‘𝑅) | |
13 | deg1leb.a | . . . . . 6 ⊢ 𝐴 = (coe1‘𝐹) | |
14 | 5, 6, 7, 12, 13 | deg1leb 25270 | . . . . 5 ⊢ ((𝐹 ∈ 𝐵 ∧ (𝐷‘𝐹) ∈ ℝ*) → ((𝐷‘𝐹) ≤ (𝐷‘𝐹) ↔ ∀𝑥 ∈ ℕ0 ((𝐷‘𝐹) < 𝑥 → (𝐴‘𝑥) = 0 ))) |
15 | 11, 8, 14 | syl2anc2 585 | . . . 4 ⊢ ((𝐹 ∈ 𝐵 ∧ 𝐺 ∈ ℕ0 ∧ (𝐷‘𝐹) < 𝐺) → ((𝐷‘𝐹) ≤ (𝐷‘𝐹) ↔ ∀𝑥 ∈ ℕ0 ((𝐷‘𝐹) < 𝑥 → (𝐴‘𝑥) = 0 ))) |
16 | 10, 15 | mpbid 231 | . . 3 ⊢ ((𝐹 ∈ 𝐵 ∧ 𝐺 ∈ ℕ0 ∧ (𝐷‘𝐹) < 𝐺) → ∀𝑥 ∈ ℕ0 ((𝐷‘𝐹) < 𝑥 → (𝐴‘𝑥) = 0 )) |
17 | simp2 1136 | . . 3 ⊢ ((𝐹 ∈ 𝐵 ∧ 𝐺 ∈ ℕ0 ∧ (𝐷‘𝐹) < 𝐺) → 𝐺 ∈ ℕ0) | |
18 | 4, 16, 17 | rspcdva 3561 | . 2 ⊢ ((𝐹 ∈ 𝐵 ∧ 𝐺 ∈ ℕ0 ∧ (𝐷‘𝐹) < 𝐺) → ((𝐷‘𝐹) < 𝐺 → (𝐴‘𝐺) = 0 )) |
19 | 1, 18 | mpd 15 | 1 ⊢ ((𝐹 ∈ 𝐵 ∧ 𝐺 ∈ ℕ0 ∧ (𝐷‘𝐹) < 𝐺) → (𝐴‘𝐺) = 0 ) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ↔ wb 205 ∧ w3a 1086 = wceq 1539 ∈ wcel 2106 ∀wral 3064 class class class wbr 5073 ‘cfv 6426 ℝ*cxr 11018 < clt 11019 ≤ cle 11020 ℕ0cn0 12243 Basecbs 16922 0gc0g 17160 Poly1cpl1 21358 coe1cco1 21359 deg1 cdg1 25226 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1798 ax-4 1812 ax-5 1913 ax-6 1971 ax-7 2011 ax-8 2108 ax-9 2116 ax-10 2137 ax-11 2154 ax-12 2171 ax-ext 2709 ax-rep 5208 ax-sep 5221 ax-nul 5228 ax-pow 5286 ax-pr 5350 ax-un 7578 ax-cnex 10937 ax-resscn 10938 ax-1cn 10939 ax-icn 10940 ax-addcl 10941 ax-addrcl 10942 ax-mulcl 10943 ax-mulrcl 10944 ax-mulcom 10945 ax-addass 10946 ax-mulass 10947 ax-distr 10948 ax-i2m1 10949 ax-1ne0 10950 ax-1rid 10951 ax-rnegex 10952 ax-rrecex 10953 ax-cnre 10954 ax-pre-lttri 10955 ax-pre-lttrn 10956 ax-pre-ltadd 10957 ax-pre-mulgt0 10958 ax-pre-sup 10959 ax-addf 10960 ax-mulf 10961 |
This theorem depends on definitions: df-bi 206 df-an 397 df-or 845 df-3or 1087 df-3an 1088 df-tru 1542 df-fal 1552 df-ex 1783 df-nf 1787 df-sb 2068 df-mo 2540 df-eu 2569 df-clab 2716 df-cleq 2730 df-clel 2816 df-nfc 2889 df-ne 2944 df-nel 3050 df-ral 3069 df-rex 3070 df-reu 3071 df-rmo 3072 df-rab 3073 df-v 3431 df-sbc 3716 df-csb 3832 df-dif 3889 df-un 3891 df-in 3893 df-ss 3903 df-pss 3905 df-nul 4257 df-if 4460 df-pw 4535 df-sn 4562 df-pr 4564 df-tp 4566 df-op 4568 df-uni 4840 df-int 4880 df-iun 4926 df-br 5074 df-opab 5136 df-mpt 5157 df-tr 5191 df-id 5484 df-eprel 5490 df-po 5498 df-so 5499 df-fr 5539 df-se 5540 df-we 5541 df-xp 5590 df-rel 5591 df-cnv 5592 df-co 5593 df-dm 5594 df-rn 5595 df-res 5596 df-ima 5597 df-pred 6195 df-ord 6262 df-on 6263 df-lim 6264 df-suc 6265 df-iota 6384 df-fun 6428 df-fn 6429 df-f 6430 df-f1 6431 df-fo 6432 df-f1o 6433 df-fv 6434 df-isom 6435 df-riota 7224 df-ov 7270 df-oprab 7271 df-mpo 7272 df-of 7523 df-om 7703 df-1st 7820 df-2nd 7821 df-supp 7965 df-frecs 8084 df-wrecs 8115 df-recs 8189 df-rdg 8228 df-1o 8284 df-er 8485 df-map 8604 df-en 8721 df-dom 8722 df-sdom 8723 df-fin 8724 df-fsupp 9116 df-sup 9188 df-oi 9256 df-card 9707 df-pnf 11021 df-mnf 11022 df-xr 11023 df-ltxr 11024 df-le 11025 df-sub 11217 df-neg 11218 df-nn 11984 df-2 12046 df-3 12047 df-4 12048 df-5 12049 df-6 12050 df-7 12051 df-8 12052 df-9 12053 df-n0 12244 df-z 12330 df-dec 12448 df-uz 12593 df-fz 13250 df-fzo 13393 df-seq 13732 df-hash 14055 df-struct 16858 df-sets 16875 df-slot 16893 df-ndx 16905 df-base 16923 df-ress 16952 df-plusg 16985 df-mulr 16986 df-starv 16987 df-sca 16988 df-vsca 16989 df-tset 16991 df-ple 16992 df-ds 16994 df-unif 16995 df-0g 17162 df-gsum 17163 df-mgm 18336 df-sgrp 18385 df-mnd 18396 df-submnd 18441 df-grp 18590 df-minusg 18591 df-mulg 18711 df-cntz 18933 df-cmn 19398 df-abl 19399 df-mgp 19731 df-ur 19748 df-ring 19795 df-cring 19796 df-cnfld 20608 df-psr 21122 df-mpl 21124 df-opsr 21126 df-psr1 21361 df-ply1 21363 df-coe1 21364 df-mdeg 25227 df-deg1 25228 |
This theorem is referenced by: deg1ge 25273 coe1mul3 25274 deg1add 25278 |
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