Theorem bpolydif 15774

Description: Calculate the difference between successive values of the Bernoulli polynomials. (Contributed by Scott Fenton, 16-May-2014.) (Proof shortened by Mario Carneiro, 26-May-2014.)

Assertion

Ref	Expression
bpolydif	⊢ ((𝑁 ∈ ℕ ∧ 𝑋 ∈ ℂ) → ((𝑁 BernPoly (𝑋 + 1)) − (𝑁 BernPoly 𝑋)) = (𝑁 · (𝑋↑(𝑁 − 1))))

Proof of Theorem bpolydif

Dummy variables 𝑘 𝑚 𝑛 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		oveq1 7291	. . . . . 6 ⊢ (𝑛 = 𝑘 → (𝑛 BernPoly (𝑋 + 1)) = (𝑘 BernPoly (𝑋 + 1)))
2		oveq1 7291	. . . . . 6 ⊢ (𝑛 = 𝑘 → (𝑛 BernPoly 𝑋) = (𝑘 BernPoly 𝑋))
3	1, 2	oveq12d 7302	. . . . 5 ⊢ (𝑛 = 𝑘 → ((𝑛 BernPoly (𝑋 + 1)) − (𝑛 BernPoly 𝑋)) = ((𝑘 BernPoly (𝑋 + 1)) − (𝑘 BernPoly 𝑋)))
4		id 22	. . . . . 6 ⊢ (𝑛 = 𝑘 → 𝑛 = 𝑘)
5		oveq1 7291	. . . . . . 7 ⊢ (𝑛 = 𝑘 → (𝑛 − 1) = (𝑘 − 1))
6	5	oveq2d 7300	. . . . . 6 ⊢ (𝑛 = 𝑘 → (𝑋↑(𝑛 − 1)) = (𝑋↑(𝑘 − 1)))
7	4, 6	oveq12d 7302	. . . . 5 ⊢ (𝑛 = 𝑘 → (𝑛 · (𝑋↑(𝑛 − 1))) = (𝑘 · (𝑋↑(𝑘 − 1))))
8	3, 7	eqeq12d 2755	. . . 4 ⊢ (𝑛 = 𝑘 → (((𝑛 BernPoly (𝑋 + 1)) − (𝑛 BernPoly 𝑋)) = (𝑛 · (𝑋↑(𝑛 − 1))) ↔ ((𝑘 BernPoly (𝑋 + 1)) − (𝑘 BernPoly 𝑋)) = (𝑘 · (𝑋↑(𝑘 − 1)))))
9	8	imbi2d 341	. . 3 ⊢ (𝑛 = 𝑘 → ((𝑋 ∈ ℂ → ((𝑛 BernPoly (𝑋 + 1)) − (𝑛 BernPoly 𝑋)) = (𝑛 · (𝑋↑(𝑛 − 1)))) ↔ (𝑋 ∈ ℂ → ((𝑘 BernPoly (𝑋 + 1)) − (𝑘 BernPoly 𝑋)) = (𝑘 · (𝑋↑(𝑘 − 1))))))
10		oveq1 7291	. . . . . 6 ⊢ (𝑛 = 𝑁 → (𝑛 BernPoly (𝑋 + 1)) = (𝑁 BernPoly (𝑋 + 1)))
11		oveq1 7291	. . . . . 6 ⊢ (𝑛 = 𝑁 → (𝑛 BernPoly 𝑋) = (𝑁 BernPoly 𝑋))
12	10, 11	oveq12d 7302	. . . . 5 ⊢ (𝑛 = 𝑁 → ((𝑛 BernPoly (𝑋 + 1)) − (𝑛 BernPoly 𝑋)) = ((𝑁 BernPoly (𝑋 + 1)) − (𝑁 BernPoly 𝑋)))
13		id 22	. . . . . 6 ⊢ (𝑛 = 𝑁 → 𝑛 = 𝑁)
14		oveq1 7291	. . . . . . 7 ⊢ (𝑛 = 𝑁 → (𝑛 − 1) = (𝑁 − 1))
15	14	oveq2d 7300	. . . . . 6 ⊢ (𝑛 = 𝑁 → (𝑋↑(𝑛 − 1)) = (𝑋↑(𝑁 − 1)))
16	13, 15	oveq12d 7302	. . . . 5 ⊢ (𝑛 = 𝑁 → (𝑛 · (𝑋↑(𝑛 − 1))) = (𝑁 · (𝑋↑(𝑁 − 1))))
17	12, 16	eqeq12d 2755	. . . 4 ⊢ (𝑛 = 𝑁 → (((𝑛 BernPoly (𝑋 + 1)) − (𝑛 BernPoly 𝑋)) = (𝑛 · (𝑋↑(𝑛 − 1))) ↔ ((𝑁 BernPoly (𝑋 + 1)) − (𝑁 BernPoly 𝑋)) = (𝑁 · (𝑋↑(𝑁 − 1)))))
18	17	imbi2d 341	. . 3 ⊢ (𝑛 = 𝑁 → ((𝑋 ∈ ℂ → ((𝑛 BernPoly (𝑋 + 1)) − (𝑛 BernPoly 𝑋)) = (𝑛 · (𝑋↑(𝑛 − 1)))) ↔ (𝑋 ∈ ℂ → ((𝑁 BernPoly (𝑋 + 1)) − (𝑁 BernPoly 𝑋)) = (𝑁 · (𝑋↑(𝑁 − 1))))))
19		simp1 1135	. . . . 5 ⊢ ((𝑛 ∈ ℕ ∧ ∀𝑘 ∈ (1...(𝑛 − 1))(𝑋 ∈ ℂ → ((𝑘 BernPoly (𝑋 + 1)) − (𝑘 BernPoly 𝑋)) = (𝑘 · (𝑋↑(𝑘 − 1)))) ∧ 𝑋 ∈ ℂ) → 𝑛 ∈ ℕ)
20		simp3 1137	. . . . 5 ⊢ ((𝑛 ∈ ℕ ∧ ∀𝑘 ∈ (1...(𝑛 − 1))(𝑋 ∈ ℂ → ((𝑘 BernPoly (𝑋 + 1)) − (𝑘 BernPoly 𝑋)) = (𝑘 · (𝑋↑(𝑘 − 1)))) ∧ 𝑋 ∈ ℂ) → 𝑋 ∈ ℂ)
21		simpl3 1192	. . . . . 6 ⊢ (((𝑛 ∈ ℕ ∧ ∀𝑘 ∈ (1...(𝑛 − 1))(𝑋 ∈ ℂ → ((𝑘 BernPoly (𝑋 + 1)) − (𝑘 BernPoly 𝑋)) = (𝑘 · (𝑋↑(𝑘 − 1)))) ∧ 𝑋 ∈ ℂ) ∧ 𝑚 ∈ (1...(𝑛 − 1))) → 𝑋 ∈ ℂ)
22		oveq1 7291	. . . . . . . . . . 11 ⊢ (𝑘 = 𝑚 → (𝑘 BernPoly (𝑋 + 1)) = (𝑚 BernPoly (𝑋 + 1)))
23		oveq1 7291	. . . . . . . . . . 11 ⊢ (𝑘 = 𝑚 → (𝑘 BernPoly 𝑋) = (𝑚 BernPoly 𝑋))
24	22, 23	oveq12d 7302	. . . . . . . . . 10 ⊢ (𝑘 = 𝑚 → ((𝑘 BernPoly (𝑋 + 1)) − (𝑘 BernPoly 𝑋)) = ((𝑚 BernPoly (𝑋 + 1)) − (𝑚 BernPoly 𝑋)))
25		id 22	. . . . . . . . . . 11 ⊢ (𝑘 = 𝑚 → 𝑘 = 𝑚)
26		oveq1 7291	. . . . . . . . . . . 12 ⊢ (𝑘 = 𝑚 → (𝑘 − 1) = (𝑚 − 1))
27	26	oveq2d 7300	. . . . . . . . . . 11 ⊢ (𝑘 = 𝑚 → (𝑋↑(𝑘 − 1)) = (𝑋↑(𝑚 − 1)))
28	25, 27	oveq12d 7302	. . . . . . . . . 10 ⊢ (𝑘 = 𝑚 → (𝑘 · (𝑋↑(𝑘 − 1))) = (𝑚 · (𝑋↑(𝑚 − 1))))
29	24, 28	eqeq12d 2755	. . . . . . . . 9 ⊢ (𝑘 = 𝑚 → (((𝑘 BernPoly (𝑋 + 1)) − (𝑘 BernPoly 𝑋)) = (𝑘 · (𝑋↑(𝑘 − 1))) ↔ ((𝑚 BernPoly (𝑋 + 1)) − (𝑚 BernPoly 𝑋)) = (𝑚 · (𝑋↑(𝑚 − 1)))))
30	29	imbi2d 341	. . . . . . . 8 ⊢ (𝑘 = 𝑚 → ((𝑋 ∈ ℂ → ((𝑘 BernPoly (𝑋 + 1)) − (𝑘 BernPoly 𝑋)) = (𝑘 · (𝑋↑(𝑘 − 1)))) ↔ (𝑋 ∈ ℂ → ((𝑚 BernPoly (𝑋 + 1)) − (𝑚 BernPoly 𝑋)) = (𝑚 · (𝑋↑(𝑚 − 1))))))
31	30	rspccva 3561	. . . . . . 7 ⊢ ((∀𝑘 ∈ (1...(𝑛 − 1))(𝑋 ∈ ℂ → ((𝑘 BernPoly (𝑋 + 1)) − (𝑘 BernPoly 𝑋)) = (𝑘 · (𝑋↑(𝑘 − 1)))) ∧ 𝑚 ∈ (1...(𝑛 − 1))) → (𝑋 ∈ ℂ → ((𝑚 BernPoly (𝑋 + 1)) − (𝑚 BernPoly 𝑋)) = (𝑚 · (𝑋↑(𝑚 − 1)))))
32	31	3ad2antl2 1185	. . . . . 6 ⊢ (((𝑛 ∈ ℕ ∧ ∀𝑘 ∈ (1...(𝑛 − 1))(𝑋 ∈ ℂ → ((𝑘 BernPoly (𝑋 + 1)) − (𝑘 BernPoly 𝑋)) = (𝑘 · (𝑋↑(𝑘 − 1)))) ∧ 𝑋 ∈ ℂ) ∧ 𝑚 ∈ (1...(𝑛 − 1))) → (𝑋 ∈ ℂ → ((𝑚 BernPoly (𝑋 + 1)) − (𝑚 BernPoly 𝑋)) = (𝑚 · (𝑋↑(𝑚 − 1)))))
33	21, 32	mpd 15	. . . . 5 ⊢ (((𝑛 ∈ ℕ ∧ ∀𝑘 ∈ (1...(𝑛 − 1))(𝑋 ∈ ℂ → ((𝑘 BernPoly (𝑋 + 1)) − (𝑘 BernPoly 𝑋)) = (𝑘 · (𝑋↑(𝑘 − 1)))) ∧ 𝑋 ∈ ℂ) ∧ 𝑚 ∈ (1...(𝑛 − 1))) → ((𝑚 BernPoly (𝑋 + 1)) − (𝑚 BernPoly 𝑋)) = (𝑚 · (𝑋↑(𝑚 − 1))))
34	19, 20, 33	bpolydiflem 15773	. . . 4 ⊢ ((𝑛 ∈ ℕ ∧ ∀𝑘 ∈ (1...(𝑛 − 1))(𝑋 ∈ ℂ → ((𝑘 BernPoly (𝑋 + 1)) − (𝑘 BernPoly 𝑋)) = (𝑘 · (𝑋↑(𝑘 − 1)))) ∧ 𝑋 ∈ ℂ) → ((𝑛 BernPoly (𝑋 + 1)) − (𝑛 BernPoly 𝑋)) = (𝑛 · (𝑋↑(𝑛 − 1))))
35	34	3exp 1118	. . 3 ⊢ (𝑛 ∈ ℕ → (∀𝑘 ∈ (1...(𝑛 − 1))(𝑋 ∈ ℂ → ((𝑘 BernPoly (𝑋 + 1)) − (𝑘 BernPoly 𝑋)) = (𝑘 · (𝑋↑(𝑘 − 1)))) → (𝑋 ∈ ℂ → ((𝑛 BernPoly (𝑋 + 1)) − (𝑛 BernPoly 𝑋)) = (𝑛 · (𝑋↑(𝑛 − 1))))))
36	9, 18, 35	nnsinds 13717	. 2 ⊢ (𝑁 ∈ ℕ → (𝑋 ∈ ℂ → ((𝑁 BernPoly (𝑋 + 1)) − (𝑁 BernPoly 𝑋)) = (𝑁 · (𝑋↑(𝑁 − 1)))))
37	36	imp 407	1 ⊢ ((𝑁 ∈ ℕ ∧ 𝑋 ∈ ℂ) → ((𝑁 BernPoly (𝑋 + 1)) − (𝑁 BernPoly 𝑋)) = (𝑁 · (𝑋↑(𝑁 − 1))))

Syntax hints:   → wi 4   ∧ wa 396   ∧ w3a 1086   = wceq 1539   ∈ wcel 2107  ∀wral 3065  (class class class)co 7284  ℂcc 10878  1c1 10881   + caddc 10883   · cmul 10885   − cmin 11214  ℕcn 11982  ...cfz 13248  ↑cexp 13791   BernPoly cbp 15765

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 1914  ax-6 1972  ax-7 2012  ax-8 2109  ax-9 2117  ax-10 2138  ax-11 2155  ax-12 2172  ax-ext 2710  ax-rep 5210  ax-sep 5224  ax-nul 5231  ax-pow 5289  ax-pr 5353  ax-un 7597  ax-inf2 9408  ax-cnex 10936  ax-resscn 10937  ax-1cn 10938  ax-icn 10939  ax-addcl 10940  ax-addrcl 10941  ax-mulcl 10942  ax-mulrcl 10943  ax-mulcom 10944  ax-addass 10945  ax-mulass 10946  ax-distr 10947  ax-i2m1 10948  ax-1ne0 10949  ax-1rid 10950  ax-rnegex 10951  ax-rrecex 10952  ax-cnre 10953  ax-pre-lttri 10954  ax-pre-lttrn 10955  ax-pre-ltadd 10956  ax-pre-mulgt0 10957  ax-pre-sup 10958

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 2069  df-mo 2541  df-eu 2570  df-clab 2717  df-cleq 2731  df-clel 2817  df-nfc 2890  df-ne 2945  df-nel 3051  df-ral 3070  df-rex 3071  df-rmo 3072  df-reu 3073  df-rab 3074  df-v 3435  df-sbc 3718  df-csb 3834  df-dif 3891  df-un 3893  df-in 3895  df-ss 3905  df-pss 3907  df-nul 4258  df-if 4461  df-pw 4536  df-sn 4563  df-pr 4565  df-op 4569  df-uni 4841  df-int 4881  df-iun 4927  df-br 5076  df-opab 5138  df-mpt 5159  df-tr 5193  df-id 5490  df-eprel 5496  df-po 5504  df-so 5505  df-fr 5545  df-se 5546  df-we 5547  df-xp 5596  df-rel 5597  df-cnv 5598  df-co 5599  df-dm 5600  df-rn 5601  df-res 5602  df-ima 5603  df-pred 6206  df-ord 6273  df-on 6274  df-lim 6275  df-suc 6276  df-iota 6395  df-fun 6439  df-fn 6440  df-f 6441  df-f1 6442  df-fo 6443  df-f1o 6444  df-fv 6445  df-isom 6446  df-riota 7241  df-ov 7287  df-oprab 7288  df-mpo 7289  df-om 7722  df-1st 7840  df-2nd 7841  df-frecs 8106  df-wrecs 8137  df-recs 8211  df-rdg 8250  df-1o 8306  df-er 8507  df-en 8743  df-dom 8744  df-sdom 8745  df-fin 8746  df-sup 9210  df-oi 9278  df-card 9706  df-pnf 11020  df-mnf 11021  df-xr 11022  df-ltxr 11023  df-le 11024  df-sub 11216  df-neg 11217  df-div 11642  df-nn 11983  df-2 12045  df-3 12046  df-n0 12243  df-z 12329  df-uz 12592  df-rp 12740  df-fz 13249  df-fzo 13392  df-seq 13731  df-exp 13792  df-fac 13997  df-bc 14026  df-hash 14054  df-cj 14819  df-re 14820  df-im 14821  df-sqrt 14955  df-abs 14956  df-clim 15206  df-sum 15407  df-bpoly 15766

This theorem is referenced by:  fsumkthpow  15775