Theorem coesub 24058

Description: The coefficient function of a sum is the sum of coefficients. (Contributed by Mario Carneiro, 24-Jul-2014.)

Hypotheses

Ref	Expression
coesub.1	⊢ 𝐴 = (coeff‘𝐹)
coesub.2	⊢ 𝐵 = (coeff‘𝐺)

Assertion

Ref	Expression
coesub	⊢ ((𝐹 ∈ (Poly‘𝑆) ∧ 𝐺 ∈ (Poly‘𝑆)) → (coeff‘(𝐹 ∘𝑓 − 𝐺)) = (𝐴 ∘𝑓 − 𝐵))

Proof of Theorem coesub

Step	Hyp	Ref	Expression
1		plyssc 24001	. . . . 5 ⊢ (Poly‘𝑆) ⊆ (Poly‘ℂ)
2		simpl 472	. . . . 5 ⊢ ((𝐹 ∈ (Poly‘𝑆) ∧ 𝐺 ∈ (Poly‘𝑆)) → 𝐹 ∈ (Poly‘𝑆))
3	1, 2	sseldi 3634	. . . 4 ⊢ ((𝐹 ∈ (Poly‘𝑆) ∧ 𝐺 ∈ (Poly‘𝑆)) → 𝐹 ∈ (Poly‘ℂ))
4		ssid 3657	. . . . . 6 ⊢ ℂ ⊆ ℂ
5		neg1cn 11162	. . . . . 6 ⊢ -1 ∈ ℂ
6		plyconst 24007	. . . . . 6 ⊢ ((ℂ ⊆ ℂ ∧ -1 ∈ ℂ) → (ℂ × {-1}) ∈ (Poly‘ℂ))
7	4, 5, 6	mp2an 708	. . . . 5 ⊢ (ℂ × {-1}) ∈ (Poly‘ℂ)
8		simpr 476	. . . . . 6 ⊢ ((𝐹 ∈ (Poly‘𝑆) ∧ 𝐺 ∈ (Poly‘𝑆)) → 𝐺 ∈ (Poly‘𝑆))
9	1, 8	sseldi 3634	. . . . 5 ⊢ ((𝐹 ∈ (Poly‘𝑆) ∧ 𝐺 ∈ (Poly‘𝑆)) → 𝐺 ∈ (Poly‘ℂ))
10		plymulcl 24022	. . . . 5 ⊢ (((ℂ × {-1}) ∈ (Poly‘ℂ) ∧ 𝐺 ∈ (Poly‘ℂ)) → ((ℂ × {-1}) ∘𝑓 · 𝐺) ∈ (Poly‘ℂ))
11	7, 9, 10	sylancr 696	. . . 4 ⊢ ((𝐹 ∈ (Poly‘𝑆) ∧ 𝐺 ∈ (Poly‘𝑆)) → ((ℂ × {-1}) ∘𝑓 · 𝐺) ∈ (Poly‘ℂ))
12		coesub.1	. . . . 5 ⊢ 𝐴 = (coeff‘𝐹)
13		eqid 2651	. . . . 5 ⊢ (coeff‘((ℂ × {-1}) ∘𝑓 · 𝐺)) = (coeff‘((ℂ × {-1}) ∘𝑓 · 𝐺))
14	12, 13	coeadd 24052	. . . 4 ⊢ ((𝐹 ∈ (Poly‘ℂ) ∧ ((ℂ × {-1}) ∘𝑓 · 𝐺) ∈ (Poly‘ℂ)) → (coeff‘(𝐹 ∘𝑓 + ((ℂ × {-1}) ∘𝑓 · 𝐺))) = (𝐴 ∘𝑓 + (coeff‘((ℂ × {-1}) ∘𝑓 · 𝐺))))
15	3, 11, 14	syl2anc 694	. . 3 ⊢ ((𝐹 ∈ (Poly‘𝑆) ∧ 𝐺 ∈ (Poly‘𝑆)) → (coeff‘(𝐹 ∘𝑓 + ((ℂ × {-1}) ∘𝑓 · 𝐺))) = (𝐴 ∘𝑓 + (coeff‘((ℂ × {-1}) ∘𝑓 · 𝐺))))
16		coemulc 24056	. . . . . 6 ⊢ ((-1 ∈ ℂ ∧ 𝐺 ∈ (Poly‘ℂ)) → (coeff‘((ℂ × {-1}) ∘𝑓 · 𝐺)) = ((ℕ0 × {-1}) ∘𝑓 · (coeff‘𝐺)))
17	5, 9, 16	sylancr 696	. . . . 5 ⊢ ((𝐹 ∈ (Poly‘𝑆) ∧ 𝐺 ∈ (Poly‘𝑆)) → (coeff‘((ℂ × {-1}) ∘𝑓 · 𝐺)) = ((ℕ0 × {-1}) ∘𝑓 · (coeff‘𝐺)))
18		coesub.2	. . . . . 6 ⊢ 𝐵 = (coeff‘𝐺)
19	18	oveq2i 6701	. . . . 5 ⊢ ((ℕ0 × {-1}) ∘𝑓 · 𝐵) = ((ℕ0 × {-1}) ∘𝑓 · (coeff‘𝐺))
20	17, 19	syl6eqr 2703	. . . 4 ⊢ ((𝐹 ∈ (Poly‘𝑆) ∧ 𝐺 ∈ (Poly‘𝑆)) → (coeff‘((ℂ × {-1}) ∘𝑓 · 𝐺)) = ((ℕ0 × {-1}) ∘𝑓 · 𝐵))
21	20	oveq2d 6706	. . 3 ⊢ ((𝐹 ∈ (Poly‘𝑆) ∧ 𝐺 ∈ (Poly‘𝑆)) → (𝐴 ∘𝑓 + (coeff‘((ℂ × {-1}) ∘𝑓 · 𝐺))) = (𝐴 ∘𝑓 + ((ℕ0 × {-1}) ∘𝑓 · 𝐵)))
22	15, 21	eqtrd 2685	. 2 ⊢ ((𝐹 ∈ (Poly‘𝑆) ∧ 𝐺 ∈ (Poly‘𝑆)) → (coeff‘(𝐹 ∘𝑓 + ((ℂ × {-1}) ∘𝑓 · 𝐺))) = (𝐴 ∘𝑓 + ((ℕ0 × {-1}) ∘𝑓 · 𝐵)))
23		cnex 10055	. . . . 5 ⊢ ℂ ∈ V
24	23	a1i 11	. . . 4 ⊢ ((𝐹 ∈ (Poly‘𝑆) ∧ 𝐺 ∈ (Poly‘𝑆)) → ℂ ∈ V)
25		plyf 23999	. . . . 5 ⊢ (𝐹 ∈ (Poly‘𝑆) → 𝐹:ℂ⟶ℂ)
26	25	adantr 480	. . . 4 ⊢ ((𝐹 ∈ (Poly‘𝑆) ∧ 𝐺 ∈ (Poly‘𝑆)) → 𝐹:ℂ⟶ℂ)
27		plyf 23999	. . . . 5 ⊢ (𝐺 ∈ (Poly‘𝑆) → 𝐺:ℂ⟶ℂ)
28	27	adantl 481	. . . 4 ⊢ ((𝐹 ∈ (Poly‘𝑆) ∧ 𝐺 ∈ (Poly‘𝑆)) → 𝐺:ℂ⟶ℂ)
29		ofnegsub 11056	. . . 4 ⊢ ((ℂ ∈ V ∧ 𝐹:ℂ⟶ℂ ∧ 𝐺:ℂ⟶ℂ) → (𝐹 ∘𝑓 + ((ℂ × {-1}) ∘𝑓 · 𝐺)) = (𝐹 ∘𝑓 − 𝐺))
30	24, 26, 28, 29	syl3anc 1366	. . 3 ⊢ ((𝐹 ∈ (Poly‘𝑆) ∧ 𝐺 ∈ (Poly‘𝑆)) → (𝐹 ∘𝑓 + ((ℂ × {-1}) ∘𝑓 · 𝐺)) = (𝐹 ∘𝑓 − 𝐺))
31	30	fveq2d 6233	. 2 ⊢ ((𝐹 ∈ (Poly‘𝑆) ∧ 𝐺 ∈ (Poly‘𝑆)) → (coeff‘(𝐹 ∘𝑓 + ((ℂ × {-1}) ∘𝑓 · 𝐺))) = (coeff‘(𝐹 ∘𝑓 − 𝐺)))
32		nn0ex 11336	. . . 4 ⊢ ℕ0 ∈ V
33	32	a1i 11	. . 3 ⊢ ((𝐹 ∈ (Poly‘𝑆) ∧ 𝐺 ∈ (Poly‘𝑆)) → ℕ0 ∈ V)
34	12	coef3 24033	. . . 4 ⊢ (𝐹 ∈ (Poly‘𝑆) → 𝐴:ℕ0⟶ℂ)
35	34	adantr 480	. . 3 ⊢ ((𝐹 ∈ (Poly‘𝑆) ∧ 𝐺 ∈ (Poly‘𝑆)) → 𝐴:ℕ0⟶ℂ)
36	18	coef3 24033	. . . 4 ⊢ (𝐺 ∈ (Poly‘𝑆) → 𝐵:ℕ0⟶ℂ)
37	36	adantl 481	. . 3 ⊢ ((𝐹 ∈ (Poly‘𝑆) ∧ 𝐺 ∈ (Poly‘𝑆)) → 𝐵:ℕ0⟶ℂ)
38		ofnegsub 11056	. . 3 ⊢ ((ℕ0 ∈ V ∧ 𝐴:ℕ0⟶ℂ ∧ 𝐵:ℕ0⟶ℂ) → (𝐴 ∘𝑓 + ((ℕ0 × {-1}) ∘𝑓 · 𝐵)) = (𝐴 ∘𝑓 − 𝐵))
39	33, 35, 37, 38	syl3anc 1366	. 2 ⊢ ((𝐹 ∈ (Poly‘𝑆) ∧ 𝐺 ∈ (Poly‘𝑆)) → (𝐴 ∘𝑓 + ((ℕ0 × {-1}) ∘𝑓 · 𝐵)) = (𝐴 ∘𝑓 − 𝐵))
40	22, 31, 39	3eqtr3d 2693	1 ⊢ ((𝐹 ∈ (Poly‘𝑆) ∧ 𝐺 ∈ (Poly‘𝑆)) → (coeff‘(𝐹 ∘𝑓 − 𝐺)) = (𝐴 ∘𝑓 − 𝐵))

Syntax hints:   → wi 4   ∧ wa 383   = wceq 1523   ∈ wcel 2030  Vcvv 3231   ⊆ wss 3607  {csn 4210   × cxp 5141  ⟶wf 5922  ‘cfv 5926  (class class class)co 6690   ∘_𝑓 cof 6937  ℂcc 9972  1c1 9975   + caddc 9977   · cmul 9979   − cmin 10304  -cneg 10305  ℕ₀cn0 11330  Polycply 23985  coeffccoe 23987

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1762  ax-4 1777  ax-5 1879  ax-6 1945  ax-7 1981  ax-8 2032  ax-9 2039  ax-10 2059  ax-11 2074  ax-12 2087  ax-13 2282  ax-ext 2631  ax-rep 4804  ax-sep 4814  ax-nul 4822  ax-pow 4873  ax-pr 4936  ax-un 6991  ax-inf2 8576  ax-cnex 10030  ax-resscn 10031  ax-1cn 10032  ax-icn 10033  ax-addcl 10034  ax-addrcl 10035  ax-mulcl 10036  ax-mulrcl 10037  ax-mulcom 10038  ax-addass 10039  ax-mulass 10040  ax-distr 10041  ax-i2m1 10042  ax-1ne0 10043  ax-1rid 10044  ax-rnegex 10045  ax-rrecex 10046  ax-cnre 10047  ax-pre-lttri 10048  ax-pre-lttrn 10049  ax-pre-ltadd 10050  ax-pre-mulgt0 10051  ax-pre-sup 10052  ax-addf 10053

This theorem depends on definitions:  df-bi 197  df-or 384  df-an 385  df-3or 1055  df-3an 1056  df-tru 1526  df-fal 1529  df-ex 1745  df-nf 1750  df-sb 1938  df-eu 2502  df-mo 2503  df-clab 2638  df-cleq 2644  df-clel 2647  df-nfc 2782  df-ne 2824  df-nel 2927  df-ral 2946  df-rex 2947  df-reu 2948  df-rmo 2949  df-rab 2950  df-v 3233  df-sbc 3469  df-csb 3567  df-dif 3610  df-un 3612  df-in 3614  df-ss 3621  df-pss 3623  df-nul 3949  df-if 4120  df-pw 4193  df-sn 4211  df-pr 4213  df-tp 4215  df-op 4217  df-uni 4469  df-int 4508  df-iun 4554  df-br 4686  df-opab 4746  df-mpt 4763  df-tr 4786  df-id 5053  df-eprel 5058  df-po 5064  df-so 5065  df-fr 5102  df-se 5103  df-we 5104  df-xp 5149  df-rel 5150  df-cnv 5151  df-co 5152  df-dm 5153  df-rn 5154  df-res 5155  df-ima 5156  df-pred 5718  df-ord 5764  df-on 5765  df-lim 5766  df-suc 5767  df-iota 5889  df-fun 5928  df-fn 5929  df-f 5930  df-f1 5931  df-fo 5932  df-f1o 5933  df-fv 5934  df-isom 5935  df-riota 6651  df-ov 6693  df-oprab 6694  df-mpt2 6695  df-of 6939  df-om 7108  df-1st 7210  df-2nd 7211  df-wrecs 7452  df-recs 7513  df-rdg 7551  df-1o 7605  df-oadd 7609  df-er 7787  df-map 7901  df-pm 7902  df-en 7998  df-dom 7999  df-sdom 8000  df-fin 8001  df-sup 8389  df-inf 8390  df-oi 8456  df-card 8803  df-pnf 10114  df-mnf 10115  df-xr 10116  df-ltxr 10117  df-le 10118  df-sub 10306  df-neg 10307  df-div 10723  df-nn 11059  df-2 11117  df-3 11118  df-n0 11331  df-z 11416  df-uz 11726  df-rp 11871  df-fz 12365  df-fzo 12505  df-fl 12633  df-seq 12842  df-exp 12901  df-hash 13158  df-cj 13883  df-re 13884  df-im 13885  df-sqrt 14019  df-abs 14020  df-clim 14263  df-rlim 14264  df-sum 14461  df-0p 23482  df-ply 23989  df-coe 23991  df-dgr 23992

This theorem is referenced by:  dgrcolem2  24075  plydivlem4  24096  plydiveu  24098  vieta1lem2  24111  dgrsub2  38022