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Student Support Forum: 'Mathematica Can't Resolve an Integrate' topicStudent Support Forum > General > Archives > "Mathematica Can't Resolve an Integrate"

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Author Comment/Response
Claudio ORyan
06/07/12 11:14am

Hi. I would like to integrate the formula below. Mathematica does not give me a results for the second integrate, only for the first. Some idea?

R2 = 4*2.54/100 (*metros*)
R1 = 2*2.54/100
Mu0 = 4*Pi*10^(-7)
Br = 1.5
M = 4*Pi*Br*Mu0
Nm = 32
n = 0
j = 1
g = 2.5/10/100
T = 1/4*2.54/100
H = 0.8/10/100
z1 = 0
z2 = T
zeta[j_] = If[j == 1, z1, z2]
Bfi[r_, fi_, z_] :=
Integrate[(z - zeta[j])*Cos[fi - fiprima ] *
rprima /((r^2 + rprima^2 + (z - zeta[j])^2 -
2*r*rprima*Cos[fi - fiprima])^0.5)^3,
{fiprima, \
(4*n + 1)*Pi/Nm, (4*n + 3)*Pi/Nm} ,
Assumptions ->
R1 <= r <= R2 &&
R1 <= rprima <= R2 && (4*n + 1)*Pi/Nm <=
fiprima <= (4*n + 3)*Pi/Nm]

         


Bfiavgtop1[r_] = Bfi[r, Pi/2, -g]
Bfiavgtop2[r_] =
Integrate[Bfiavgtop1[r], {rprima, R1, R2},
Assumptions -> R1 <= r <= R2 ]



regards

Claudio

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Subject (listing for 'Mathematica Can't Resolve an Integrate')
Author Date Posted
Mathematica Can't Resolve an Integrate Claudio ORyan 06/07/12 11:14am
Re: Mathematica Can't Resolve an Integrate Peter Pein 06/08/12 11:41am
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