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Mirrors > Home > MPE Home > Th. List > deg1ge | Structured version Visualization version GIF version |
Description: Conversely, a nonzero coefficient sets a lower bound on the degree. (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 |
---|---|
deg1ge | ⊢ ((𝐹 ∈ 𝐵 ∧ 𝐺 ∈ ℕ0 ∧ (𝐴‘𝐺) ≠ 0 ) → 𝐺 ≤ (𝐷‘𝐹)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | deg1leb.d | . . . . . 6 ⊢ 𝐷 = ( deg1 ‘𝑅) | |
2 | deg1leb.p | . . . . . 6 ⊢ 𝑃 = (Poly1‘𝑅) | |
3 | deg1leb.b | . . . . . 6 ⊢ 𝐵 = (Base‘𝑃) | |
4 | 1, 2, 3 | deg1xrcl 24827 | . . . . 5 ⊢ (𝐹 ∈ 𝐵 → (𝐷‘𝐹) ∈ ℝ*) |
5 | nn0re 11978 | . . . . . 6 ⊢ (𝐺 ∈ ℕ0 → 𝐺 ∈ ℝ) | |
6 | 5 | rexrd 10762 | . . . . 5 ⊢ (𝐺 ∈ ℕ0 → 𝐺 ∈ ℝ*) |
7 | xrltnle 10779 | . . . . 5 ⊢ (((𝐷‘𝐹) ∈ ℝ* ∧ 𝐺 ∈ ℝ*) → ((𝐷‘𝐹) < 𝐺 ↔ ¬ 𝐺 ≤ (𝐷‘𝐹))) | |
8 | 4, 6, 7 | syl2an 599 | . . . 4 ⊢ ((𝐹 ∈ 𝐵 ∧ 𝐺 ∈ ℕ0) → ((𝐷‘𝐹) < 𝐺 ↔ ¬ 𝐺 ≤ (𝐷‘𝐹))) |
9 | deg1leb.y | . . . . . 6 ⊢ 0 = (0g‘𝑅) | |
10 | deg1leb.a | . . . . . 6 ⊢ 𝐴 = (coe1‘𝐹) | |
11 | 1, 2, 3, 9, 10 | deg1lt 24842 | . . . . 5 ⊢ ((𝐹 ∈ 𝐵 ∧ 𝐺 ∈ ℕ0 ∧ (𝐷‘𝐹) < 𝐺) → (𝐴‘𝐺) = 0 ) |
12 | 11 | 3expia 1122 | . . . 4 ⊢ ((𝐹 ∈ 𝐵 ∧ 𝐺 ∈ ℕ0) → ((𝐷‘𝐹) < 𝐺 → (𝐴‘𝐺) = 0 )) |
13 | 8, 12 | sylbird 263 | . . 3 ⊢ ((𝐹 ∈ 𝐵 ∧ 𝐺 ∈ ℕ0) → (¬ 𝐺 ≤ (𝐷‘𝐹) → (𝐴‘𝐺) = 0 )) |
14 | 13 | necon1ad 2951 | . 2 ⊢ ((𝐹 ∈ 𝐵 ∧ 𝐺 ∈ ℕ0) → ((𝐴‘𝐺) ≠ 0 → 𝐺 ≤ (𝐷‘𝐹))) |
15 | 14 | 3impia 1118 | 1 ⊢ ((𝐹 ∈ 𝐵 ∧ 𝐺 ∈ ℕ0 ∧ (𝐴‘𝐺) ≠ 0 ) → 𝐺 ≤ (𝐷‘𝐹)) |
Colors of variables: wff setvar class |
Syntax hints: ¬ wn 3 → wi 4 ↔ wb 209 ∧ wa 399 ∧ w3a 1088 = wceq 1542 ∈ wcel 2113 ≠ wne 2934 class class class wbr 5027 ‘cfv 6333 ℝ*cxr 10745 < clt 10746 ≤ cle 10747 ℕ0cn0 11969 Basecbs 16579 0gc0g 16809 Poly1cpl1 20945 coe1cco1 20946 deg1 cdg1 24796 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1802 ax-4 1816 ax-5 1916 ax-6 1974 ax-7 2019 ax-8 2115 ax-9 2123 ax-10 2144 ax-11 2161 ax-12 2178 ax-ext 2710 ax-rep 5151 ax-sep 5164 ax-nul 5171 ax-pow 5229 ax-pr 5293 ax-un 7473 ax-cnex 10664 ax-resscn 10665 ax-1cn 10666 ax-icn 10667 ax-addcl 10668 ax-addrcl 10669 ax-mulcl 10670 ax-mulrcl 10671 ax-mulcom 10672 ax-addass 10673 ax-mulass 10674 ax-distr 10675 ax-i2m1 10676 ax-1ne0 10677 ax-1rid 10678 ax-rnegex 10679 ax-rrecex 10680 ax-cnre 10681 ax-pre-lttri 10682 ax-pre-lttrn 10683 ax-pre-ltadd 10684 ax-pre-mulgt0 10685 ax-pre-sup 10686 ax-addf 10687 ax-mulf 10688 |
This theorem depends on definitions: df-bi 210 df-an 400 df-or 847 df-3or 1089 df-3an 1090 df-tru 1545 df-fal 1555 df-ex 1787 df-nf 1791 df-sb 2074 df-mo 2540 df-eu 2570 df-clab 2717 df-cleq 2730 df-clel 2811 df-nfc 2881 df-ne 2935 df-nel 3039 df-ral 3058 df-rex 3059 df-reu 3060 df-rmo 3061 df-rab 3062 df-v 3399 df-sbc 3680 df-csb 3789 df-dif 3844 df-un 3846 df-in 3848 df-ss 3858 df-pss 3860 df-nul 4210 df-if 4412 df-pw 4487 df-sn 4514 df-pr 4516 df-tp 4518 df-op 4520 df-uni 4794 df-int 4834 df-iun 4880 df-br 5028 df-opab 5090 df-mpt 5108 df-tr 5134 df-id 5425 df-eprel 5430 df-po 5438 df-so 5439 df-fr 5478 df-se 5479 df-we 5480 df-xp 5525 df-rel 5526 df-cnv 5527 df-co 5528 df-dm 5529 df-rn 5530 df-res 5531 df-ima 5532 df-pred 6123 df-ord 6169 df-on 6170 df-lim 6171 df-suc 6172 df-iota 6291 df-fun 6335 df-fn 6336 df-f 6337 df-f1 6338 df-fo 6339 df-f1o 6340 df-fv 6341 df-isom 6342 df-riota 7121 df-ov 7167 df-oprab 7168 df-mpo 7169 df-of 7419 df-om 7594 df-1st 7707 df-2nd 7708 df-supp 7850 df-wrecs 7969 df-recs 8030 df-rdg 8068 df-1o 8124 df-er 8313 df-map 8432 df-en 8549 df-dom 8550 df-sdom 8551 df-fin 8552 df-fsupp 8900 df-sup 8972 df-oi 9040 df-card 9434 df-pnf 10748 df-mnf 10749 df-xr 10750 df-ltxr 10751 df-le 10752 df-sub 10943 df-neg 10944 df-nn 11710 df-2 11772 df-3 11773 df-4 11774 df-5 11775 df-6 11776 df-7 11777 df-8 11778 df-9 11779 df-n0 11970 df-z 12056 df-dec 12173 df-uz 12318 df-fz 12975 df-fzo 13118 df-seq 13454 df-hash 13776 df-struct 16581 df-ndx 16582 df-slot 16583 df-base 16585 df-sets 16586 df-ress 16587 df-plusg 16674 df-mulr 16675 df-starv 16676 df-sca 16677 df-vsca 16678 df-tset 16680 df-ple 16681 df-ds 16683 df-unif 16684 df-0g 16811 df-gsum 16812 df-mgm 17961 df-sgrp 18010 df-mnd 18021 df-submnd 18066 df-grp 18215 df-minusg 18216 df-mulg 18336 df-cntz 18558 df-cmn 19019 df-abl 19020 df-mgp 19352 df-ur 19364 df-ring 19411 df-cring 19412 df-cnfld 20211 df-psr 20715 df-mpl 20717 df-opsr 20719 df-psr1 20948 df-ply1 20950 df-coe1 20951 df-mdeg 24797 df-deg1 24798 |
This theorem is referenced by: deg1add 24848 deg1mul2 24859 deg1tm 24863 plypf1 24953 |
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