## 13 Badges

6 years, 345 days

## problem with readstat...

Maple

i have a problem with readstat, when using proc , the readstat command returns some errors and do not complete the reading procedure, but without using proc, it is ok, what should i do ? is this a bug?

Download read.mw

## plot an indefinite integral ...

Maple

hi every one, i want to plot an indefinite integral  , it is some what complex and maple can not compute the answer, ( but numeric integration can be computed) , but we want to plot the output, what should we do ? tnx for help in advance

corrected.mw

## weighted norm of an expression...

Maple

how can we compute wighted norm of a matrix or a vector in maple?

## a mathematical question about a continuo...

Maple

on the basis of Fundamental theorem of calculus, the function " f " has Antiderivative F , whichi F is continuous and differentiabe in the range of integration, i have a question ? if function f has an Antiderivative F, should it be also continuous and differentiabe in that range? in the picture below it says "when f is continuous", can f be discontinuous? how it can be ? any examples?

## suggestion on faster solving set of nonl...

Maple

#first_question :how can i solve set of nonlinear ODEs,faster or using any packages ?
#second_question :what can be some boundary conditions for this type of nonlinear ODEs? how many BCs are required for this set of nonlinear ODEs? ( to use numeric solution)

 > restart:with(DEtools):with(DifferentialAlgebra):
 > eq[1]:=diff(N(r),r\$2)+2/r*diff(N(r),r)+diff(phi(r),r)/phi(r)*diff(N(r),r)-mu^2/(32*phi(r))*N(r);
 (1)
 > eq[2]:=diff(phi(r),r\$2)+2/r*diff(phi(r),r)-1/2*diff(phi(r),r)^2/phi(r)-8*diff(N(r),r)^2/(omega*(1-2*G*M/r))*phi(r);
 (2)
 > dsolve({eq[1],eq[2]});

Download nonlinear_ODE.mw

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