dsolve.mw

@Preben Alsholm 

thanks for your help.

I want to integrate from 1-pf from 0 to infinity.

how ever there is no response

@Preben Alsholm 

thanks alot .

without all answers appear.

Now I want to integrate from 1-pf from 0 to infinity.

pf(t) = - 1/9368860540464006885897929500294942738493754067580476\

                       Sum(                              60283242072506917810                              

  /                                                                \2492708370651890426583826695346977615759243027376244570481600\

                5                                                  0000 _α1  + 48761836886908100362498693025346746221198379\

                                 4                                 014765045558410300000 _α1  - 126362943667903775063217076\

                                                 3                 5604920554553391787881019689841415000 _α1  - 36076398840\

  63333632172621801361673069697268901808386340137571375

           2                                                       _α1  - 3251500216658826550587756763203254676145999707075\

  3685851289781822 _α1 - 361548320354280803026925618706408\

\ , 48501712839513299166648136538872/ exp(_α1 t) _α1 =

        /              6                 5                4   RootOf\11664000000 _Z  + 20995200000 _Z  - 2523960000 _Z

                  3                 2                           \ .. )    + 1995192000 _Z  - 13726638013 _Z  - 18331257596 _Z - 2545920/   

int(1-pf(t), t = 0 .. infinity);

               int(1 - pf(t), t = 0 .. infinity)

but this way no answer is displyed...

can you help me?

@Markiyan Hirnyk 

Thanks alot for your attention...

I need necessary help...

@Markiyan Hirnyk 

thanks alot .

without  all answers appear.

Now I want to integrate from 1-pf from 0 to infinity.

pf(t) = - 1/9368860540464006885897929500294942738493754067580476\

                       Sum(                              60283242072506917810                               

  /                                                                \2492708370651890426583826695346977615759243027376244570481600\

                5                                                  0000 _α1  + 48761836886908100362498693025346746221198379\

                                 4                                 014765045558410300000 _α1  - 126362943667903775063217076\

                                                 3                 5604920554553391787881019689841415000 _α1  - 36076398840\

  63333632172621801361673069697268901808386340137571375

           2                                                       _α1  - 3251500216658826550587756763203254676145999707075\

  3685851289781822 _α1 - 361548320354280803026925618706408\

                                  \                 ,               48501712839513299166648136538872/ exp(_α1 t)  _α1 =

        /              6                 5                4   RootOf\11664000000 _Z  + 20995200000 _Z  - 2523960000 _Z

                  3                 2                           \ .. )    + 1995192000 _Z  - 13726638013 _Z  - 18331257596 _Z - 2545920/    

int(1-pf(t), t = 0 .. infinity);

               int(1 - pf(t), t = 0 .. infinity)

but this way no answer is displyed...

can you help me?

@Markiyan Hirnyk 

thanks for your help

what do you mean with "You have to evaluate parameters."??

@Preben Alsholm 

Thanks for your help...

sys_ode := d*ph(t)/dt = (1-yc)*pc(t)+yh*prj(t)+urd*prd(t)+ugd*pgd(t)-yc*ph(t), d*pc(t)/dt = yc*ph(t)-(2-yc)*pc(t), d*pa(t)/dt = ya*pc(t)-pf(t), d*prj(t)/dt = yrj*pa(t)+prj(t), d*prd(t)/dt = -urd*prd(t)+yrd*pa(t), d*pgd(t)/dt = -ugd*pgd(t)+ygd*pa(t), d*pf(t)/dt = (1-ygd-yrj-yrd)*pa(t)+(1-yh)*prj(t); print(`output redirected...`);

    ics := ph(0) = 1, pc(0) = 0, pa(0) = 0, prj(0) = 0, prd(0) = 0, pgd(0) = 0, pf(0) = 0;

I verifid my code as seen above,

but Now I get no response/ result...with "dsolve(sys_ode, ics)"

Can any one help me?