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1 years, 143 days

## partial dervative of function ?...

Maple

using diff command to find  partial dervative of function g give zero in maple...it shouldn't be zero...how to fix itpartial_dervative.mw

 > restart:
 >
 > sigma_t:= map(epsilon-> E_0[90]*epsilon_dot*((epsilon/epsilon_dot)-(sum(p[i], i = 1 .. 3)*(epsilon/epsilon_dot))+(sum(p[i]*tau[i],i=1..3))-(sum(p[i]*tau[i]*exp(-(epsilon/(epsilon_dot*tau[i]))),i=1..3))),true_strain):
 > g:= sum(( sigma[j]-sigma_t[j])^2,j=1..10):
 > diff(g,p[1]);
 (1)

Download partial_dervative.mw

## what kind of algothrim does maple used t...

Maple

if i want to solve non linear least square problem ..maple optimazation Interactive box show ..many option...but when it comes to least square default....what kind of algothrim does it used....and in maple ..NonLinear fit commad use what kind of algothrim?..Levenberg-Marquardt algorithm?

## how to solve this integration using inte...

Maple 2023

how to solve this using integration by parts?

 > restart:
 > with(IntegrationTools):
 >
 > eq1:=int(1-(sum(p[i]*(1-exp(-((t-xi)/tau[i]))),i=1..n)),xi=0..t);
 (1)

## linear gression to get weibull parameter...

Maple 2023

weibull_damage.mw
i have weibull plot...and i want to get size and shpae parametr...how can i get ...parameters .i don't know how to perform linear regression to get these parameters in maple..please help

## hypergeometric function ...

Maple

is there anything to get hypergeo function to get algebric expression?
2*hypergeom([1/2, -k/2], [1 - k/2], csc(omega*T)^2)
how ca i change this expression to some function form?...i'm new to hypergeom functions..it somehow come to my thesis?

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