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Mirrors > Home > MPE Home > Th. List > Mathboxes > dgraaf | Structured version Visualization version GIF version |
Description: Degree function on algebraic numbers is a function. (Contributed by Stefan O'Rear, 25-Nov-2014.) (Proof shortened by AV, 29-Sep-2020.) |
Ref | Expression |
---|---|
dgraaf | ⊢ degAA:𝔸⟶ℕ |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | ltso 11105 | . . . 4 ⊢ < Or ℝ | |
2 | 1 | infex 9300 | . . 3 ⊢ inf({𝑏 ∈ ℕ ∣ ∃𝑝 ∈ ((Poly‘ℚ) ∖ {0𝑝})((deg‘𝑝) = 𝑏 ∧ (𝑝‘𝑎) = 0)}, ℝ, < ) ∈ V |
3 | df-dgraa 41163 | . . 3 ⊢ degAA = (𝑎 ∈ 𝔸 ↦ inf({𝑏 ∈ ℕ ∣ ∃𝑝 ∈ ((Poly‘ℚ) ∖ {0𝑝})((deg‘𝑝) = 𝑏 ∧ (𝑝‘𝑎) = 0)}, ℝ, < )) | |
4 | 2, 3 | fnmpti 6606 | . 2 ⊢ degAA Fn 𝔸 |
5 | dgraacl 41167 | . . 3 ⊢ (𝑎 ∈ 𝔸 → (degAA‘𝑎) ∈ ℕ) | |
6 | 5 | rgen 3063 | . 2 ⊢ ∀𝑎 ∈ 𝔸 (degAA‘𝑎) ∈ ℕ |
7 | ffnfv 7024 | . 2 ⊢ (degAA:𝔸⟶ℕ ↔ (degAA Fn 𝔸 ∧ ∀𝑎 ∈ 𝔸 (degAA‘𝑎) ∈ ℕ)) | |
8 | 4, 6, 7 | mpbir2an 709 | 1 ⊢ degAA:𝔸⟶ℕ |
Colors of variables: wff setvar class |
Syntax hints: ∧ wa 397 = wceq 1539 ∈ wcel 2104 ∀wral 3061 ∃wrex 3070 {crab 3330 ∖ cdif 3889 {csn 4565 Fn wfn 6453 ⟶wf 6454 ‘cfv 6458 infcinf 9248 ℝcr 10920 0cc0 10921 < clt 11059 ℕcn 12023 ℚcq 12738 0𝑝c0p 24882 Polycply 25394 degcdgr 25397 𝔸caa 25523 degAAcdgraa 41161 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1795 ax-4 1809 ax-5 1911 ax-6 1969 ax-7 2009 ax-8 2106 ax-9 2114 ax-10 2135 ax-11 2152 ax-12 2169 ax-ext 2707 ax-rep 5218 ax-sep 5232 ax-nul 5239 ax-pow 5297 ax-pr 5361 ax-un 7620 ax-inf2 9447 ax-cnex 10977 ax-resscn 10978 ax-1cn 10979 ax-icn 10980 ax-addcl 10981 ax-addrcl 10982 ax-mulcl 10983 ax-mulrcl 10984 ax-mulcom 10985 ax-addass 10986 ax-mulass 10987 ax-distr 10988 ax-i2m1 10989 ax-1ne0 10990 ax-1rid 10991 ax-rnegex 10992 ax-rrecex 10993 ax-cnre 10994 ax-pre-lttri 10995 ax-pre-lttrn 10996 ax-pre-ltadd 10997 ax-pre-mulgt0 10998 ax-pre-sup 10999 |
This theorem depends on definitions: df-bi 206 df-an 398 df-or 846 df-3or 1088 df-3an 1089 df-tru 1542 df-fal 1552 df-ex 1780 df-nf 1784 df-sb 2066 df-mo 2538 df-eu 2567 df-clab 2714 df-cleq 2728 df-clel 2814 df-nfc 2886 df-ne 2941 df-nel 3047 df-ral 3062 df-rex 3071 df-rmo 3331 df-reu 3332 df-rab 3333 df-v 3439 df-sbc 3722 df-csb 3838 df-dif 3895 df-un 3897 df-in 3899 df-ss 3909 df-pss 3911 df-nul 4263 df-if 4466 df-pw 4541 df-sn 4566 df-pr 4568 df-op 4572 df-uni 4845 df-int 4887 df-iun 4933 df-br 5082 df-opab 5144 df-mpt 5165 df-tr 5199 df-id 5500 df-eprel 5506 df-po 5514 df-so 5515 df-fr 5555 df-se 5556 df-we 5557 df-xp 5606 df-rel 5607 df-cnv 5608 df-co 5609 df-dm 5610 df-rn 5611 df-res 5612 df-ima 5613 df-pred 6217 df-ord 6284 df-on 6285 df-lim 6286 df-suc 6287 df-iota 6410 df-fun 6460 df-fn 6461 df-f 6462 df-f1 6463 df-fo 6464 df-f1o 6465 df-fv 6466 df-isom 6467 df-riota 7264 df-ov 7310 df-oprab 7311 df-mpo 7312 df-of 7565 df-om 7745 df-1st 7863 df-2nd 7864 df-frecs 8128 df-wrecs 8159 df-recs 8233 df-rdg 8272 df-1o 8328 df-er 8529 df-map 8648 df-pm 8649 df-en 8765 df-dom 8766 df-sdom 8767 df-fin 8768 df-sup 9249 df-inf 9250 df-oi 9317 df-card 9745 df-pnf 11061 df-mnf 11062 df-xr 11063 df-ltxr 11064 df-le 11065 df-sub 11257 df-neg 11258 df-div 11683 df-nn 12024 df-2 12086 df-3 12087 df-n0 12284 df-z 12370 df-uz 12633 df-q 12739 df-rp 12781 df-fz 13290 df-fzo 13433 df-fl 13562 df-mod 13640 df-seq 13772 df-exp 13833 df-hash 14095 df-cj 14859 df-re 14860 df-im 14861 df-sqrt 14995 df-abs 14996 df-clim 15246 df-rlim 15247 df-sum 15447 df-0p 24883 df-ply 25398 df-coe 25400 df-dgr 25401 df-aa 25524 df-dgraa 41163 |
This theorem is referenced by: (None) |
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