## 5 Reputation

12 years, 247 days

## Error, (in simpl/abs) abs is not differe...

Maple

I have coded maple script and got that error. How can I fix it?

Thanks

## diff problem with dynamic functions...

Maple

Hi.

I have two complex functions with 3 variables: z1,z2,t . I need the first derivative of one of these functions with respect to one variable onle. Here is what I did:

f1:=z1(t)+2*z2(t):

f2:=z1(t)-3*z2(t):

diff(f1,z1(t)) this gives me an error. I need to write the variable as z1(t) not z1 because I'm doing some calculations for different time.

Thanks for the help.

## floating points...

Maple

I am solving ode system in double precesion with digits 16, some results are in power of -16 which are equivalent to zero. How can I ask maple to put any number with the power of -16 or less to be zero?

Thx for the help.

## step size in RK45...

Maple

How can I specify the step size in solving complex system of ordinary differential equations using RK45 with dsolve command???

Thanks,

## Oops! you are right, thanks. How if the ...

Oops! you are right, thanks. How if the equations like these

f11:=conjugate(1/Pi*I*f1)=0:

f22:=conjugate(1/Pi*I*f2)=0:

fsolve({f11,f22})

where f1 and f2 are same as in the previous post.

The results are not explicit. How can we fix it?

Thanks again

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