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Mirrors > Home > MPE Home > Th. List > deg1nn0clb | Structured version Visualization version GIF version |
Description: A polynomial is nonzero iff it has definite degree. (Contributed by Stefan O'Rear, 23-Mar-2015.) |
Ref | Expression |
---|---|
deg1z.d | ⊢ 𝐷 = ( deg1 ‘𝑅) |
deg1z.p | ⊢ 𝑃 = (Poly1‘𝑅) |
deg1z.z | ⊢ 0 = (0g‘𝑃) |
deg1nn0cl.b | ⊢ 𝐵 = (Base‘𝑃) |
Ref | Expression |
---|---|
deg1nn0clb | ⊢ ((𝑅 ∈ Ring ∧ 𝐹 ∈ 𝐵) → (𝐹 ≠ 0 ↔ (𝐷‘𝐹) ∈ ℕ0)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | deg1z.d | . . . 4 ⊢ 𝐷 = ( deg1 ‘𝑅) | |
2 | deg1z.p | . . . 4 ⊢ 𝑃 = (Poly1‘𝑅) | |
3 | deg1z.z | . . . 4 ⊢ 0 = (0g‘𝑃) | |
4 | deg1nn0cl.b | . . . 4 ⊢ 𝐵 = (Base‘𝑃) | |
5 | 1, 2, 3, 4 | deg1nn0cl 25158 | . . 3 ⊢ ((𝑅 ∈ Ring ∧ 𝐹 ∈ 𝐵 ∧ 𝐹 ≠ 0 ) → (𝐷‘𝐹) ∈ ℕ0) |
6 | 5 | 3expia 1119 | . 2 ⊢ ((𝑅 ∈ Ring ∧ 𝐹 ∈ 𝐵) → (𝐹 ≠ 0 → (𝐷‘𝐹) ∈ ℕ0)) |
7 | mnfnre 10949 | . . . . . . 7 ⊢ -∞ ∉ ℝ | |
8 | 7 | neli 3050 | . . . . . 6 ⊢ ¬ -∞ ∈ ℝ |
9 | nn0re 12172 | . . . . . 6 ⊢ (-∞ ∈ ℕ0 → -∞ ∈ ℝ) | |
10 | 8, 9 | mto 196 | . . . . 5 ⊢ ¬ -∞ ∈ ℕ0 |
11 | 1, 2, 3 | deg1z 25157 | . . . . . . 7 ⊢ (𝑅 ∈ Ring → (𝐷‘ 0 ) = -∞) |
12 | 11 | adantr 480 | . . . . . 6 ⊢ ((𝑅 ∈ Ring ∧ 𝐹 ∈ 𝐵) → (𝐷‘ 0 ) = -∞) |
13 | 12 | eleq1d 2823 | . . . . 5 ⊢ ((𝑅 ∈ Ring ∧ 𝐹 ∈ 𝐵) → ((𝐷‘ 0 ) ∈ ℕ0 ↔ -∞ ∈ ℕ0)) |
14 | 10, 13 | mtbiri 326 | . . . 4 ⊢ ((𝑅 ∈ Ring ∧ 𝐹 ∈ 𝐵) → ¬ (𝐷‘ 0 ) ∈ ℕ0) |
15 | fveq2 6756 | . . . . . 6 ⊢ (𝐹 = 0 → (𝐷‘𝐹) = (𝐷‘ 0 )) | |
16 | 15 | eleq1d 2823 | . . . . 5 ⊢ (𝐹 = 0 → ((𝐷‘𝐹) ∈ ℕ0 ↔ (𝐷‘ 0 ) ∈ ℕ0)) |
17 | 16 | notbid 317 | . . . 4 ⊢ (𝐹 = 0 → (¬ (𝐷‘𝐹) ∈ ℕ0 ↔ ¬ (𝐷‘ 0 ) ∈ ℕ0)) |
18 | 14, 17 | syl5ibrcom 246 | . . 3 ⊢ ((𝑅 ∈ Ring ∧ 𝐹 ∈ 𝐵) → (𝐹 = 0 → ¬ (𝐷‘𝐹) ∈ ℕ0)) |
19 | 18 | necon2ad 2957 | . 2 ⊢ ((𝑅 ∈ Ring ∧ 𝐹 ∈ 𝐵) → ((𝐷‘𝐹) ∈ ℕ0 → 𝐹 ≠ 0 )) |
20 | 6, 19 | impbid 211 | 1 ⊢ ((𝑅 ∈ Ring ∧ 𝐹 ∈ 𝐵) → (𝐹 ≠ 0 ↔ (𝐷‘𝐹) ∈ ℕ0)) |
Colors of variables: wff setvar class |
Syntax hints: ¬ wn 3 → wi 4 ↔ wb 205 ∧ wa 395 = wceq 1539 ∈ wcel 2108 ≠ wne 2942 ‘cfv 6418 ℝcr 10801 -∞cmnf 10938 ℕ0cn0 12163 Basecbs 16840 0gc0g 17067 Ringcrg 19698 Poly1cpl1 21258 deg1 cdg1 25121 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1799 ax-4 1813 ax-5 1914 ax-6 1972 ax-7 2012 ax-8 2110 ax-9 2118 ax-10 2139 ax-11 2156 ax-12 2173 ax-ext 2709 ax-rep 5205 ax-sep 5218 ax-nul 5225 ax-pow 5283 ax-pr 5347 ax-un 7566 ax-cnex 10858 ax-resscn 10859 ax-1cn 10860 ax-icn 10861 ax-addcl 10862 ax-addrcl 10863 ax-mulcl 10864 ax-mulrcl 10865 ax-mulcom 10866 ax-addass 10867 ax-mulass 10868 ax-distr 10869 ax-i2m1 10870 ax-1ne0 10871 ax-1rid 10872 ax-rnegex 10873 ax-rrecex 10874 ax-cnre 10875 ax-pre-lttri 10876 ax-pre-lttrn 10877 ax-pre-ltadd 10878 ax-pre-mulgt0 10879 ax-addf 10881 ax-mulf 10882 |
This theorem depends on definitions: df-bi 206 df-an 396 df-or 844 df-3or 1086 df-3an 1087 df-tru 1542 df-fal 1552 df-ex 1784 df-nf 1788 df-sb 2069 df-mo 2540 df-eu 2569 df-clab 2716 df-cleq 2730 df-clel 2817 df-nfc 2888 df-ne 2943 df-nel 3049 df-ral 3068 df-rex 3069 df-reu 3070 df-rmo 3071 df-rab 3072 df-v 3424 df-sbc 3712 df-csb 3829 df-dif 3886 df-un 3888 df-in 3890 df-ss 3900 df-pss 3902 df-nul 4254 df-if 4457 df-pw 4532 df-sn 4559 df-pr 4561 df-tp 4563 df-op 4565 df-uni 4837 df-int 4877 df-iun 4923 df-br 5071 df-opab 5133 df-mpt 5154 df-tr 5188 df-id 5480 df-eprel 5486 df-po 5494 df-so 5495 df-fr 5535 df-se 5536 df-we 5537 df-xp 5586 df-rel 5587 df-cnv 5588 df-co 5589 df-dm 5590 df-rn 5591 df-res 5592 df-ima 5593 df-pred 6191 df-ord 6254 df-on 6255 df-lim 6256 df-suc 6257 df-iota 6376 df-fun 6420 df-fn 6421 df-f 6422 df-f1 6423 df-fo 6424 df-f1o 6425 df-fv 6426 df-isom 6427 df-riota 7212 df-ov 7258 df-oprab 7259 df-mpo 7260 df-of 7511 df-om 7688 df-1st 7804 df-2nd 7805 df-supp 7949 df-frecs 8068 df-wrecs 8099 df-recs 8173 df-rdg 8212 df-1o 8267 df-er 8456 df-map 8575 df-en 8692 df-dom 8693 df-sdom 8694 df-fin 8695 df-fsupp 9059 df-sup 9131 df-oi 9199 df-card 9628 df-pnf 10942 df-mnf 10943 df-xr 10944 df-ltxr 10945 df-le 10946 df-sub 11137 df-neg 11138 df-nn 11904 df-2 11966 df-3 11967 df-4 11968 df-5 11969 df-6 11970 df-7 11971 df-8 11972 df-9 11973 df-n0 12164 df-z 12250 df-dec 12367 df-uz 12512 df-fz 13169 df-fzo 13312 df-seq 13650 df-hash 13973 df-struct 16776 df-sets 16793 df-slot 16811 df-ndx 16823 df-base 16841 df-ress 16868 df-plusg 16901 df-mulr 16902 df-starv 16903 df-sca 16904 df-vsca 16905 df-tset 16907 df-ple 16908 df-ds 16910 df-unif 16911 df-0g 17069 df-gsum 17070 df-mgm 18241 df-sgrp 18290 df-mnd 18301 df-submnd 18346 df-grp 18495 df-minusg 18496 df-subg 18667 df-cntz 18838 df-cmn 19303 df-abl 19304 df-mgp 19636 df-ur 19653 df-ring 19700 df-cring 19701 df-cnfld 20511 df-psr 21022 df-mpl 21024 df-opsr 21026 df-psr1 21261 df-ply1 21263 df-mdeg 25122 df-deg1 25123 |
This theorem is referenced by: deg1ldgn 25163 ply1domn 25193 uc1pmon1p 25221 ply1remlem 25232 fta1glem1 25235 fta1g 25237 lgsqrlem4 26402 idomrootle 40936 mon1psubm 40947 |
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