@Preben Alsholm Thank you so much. I understood that, well.

@Carl Love Dear Carl

Yes, "t" is the variable of integration and the others are real

@Carl Love 

I think I understand it. If I am right, maple does calculations for a given number of independent variable parameter. So it partitions the range of "t" to a same number in both cases. So for example from 1000 points only 500 points coincide in two plots. Thus the second curve in part is not the same as the first one, especially at the middle and top of the figure. But since the range of "t" extends to 100 times, some new points are found at the second case which satisfy our limits for "r" and "ns", but at the bottom of the figure. So they don't change the plot much. Am I right?

But why in both figures we have 210 points? Is it an accident or something else?

@Carl Love 

I think I understand it. If I am right, maple does calculations for a given number of independent variable parameter. So it partitions the range of "t" to a same number in both cases. So for example from 1000 points only 500 points coincide in two plots. Thus the second curve in part is not the same as the first one, especially at the middle and top of the figure. But since the range of "t" extends to 100 times, some new points are found at the second case which satisfy our limits for "r" and "ns", but at the bottom of the figure. So they don't change the plot much. Am I right?

But why in both figures we have 210 points? Is it an accident or something else?

@Carl Love 

Thanksa lot! But let me do some works on it.

@Carl Love 

Thanksa lot! But let me do some works on it.

I have a few questions about your notifications.

First, where did you bring 210 from?

Second, "r" and "ns" are physical parameters and are in the ranges I have identified, i.e. 0.8<ns<1.2 and 0<r<1. I expect that for a specific choice of initial conditions like "A" and "f" the behaviour of "r" wrt "ns" should be the same at a given range. But when I change the range of "t", this behaviour at the range of "t" from 10^11 to 10^15 which there is at both of the cases differs, i.e. for a given value of "ns" we have two distinct values for "r" at a special value of "t". Am I wrong?

I have a few questions about your notifications.

First, where did you bring 210 from?

Second, "r" and "ns" are physical parameters and are in the ranges I have identified, i.e. 0.8<ns<1.2 and 0<r<1. I expect that for a specific choice of initial conditions like "A" and "f" the behaviour of "r" wrt "ns" should be the same at a given range. But when I change the range of "t", this behaviour at the range of "t" from 10^11 to 10^15 which there is at both of the cases differs, i.e. for a given value of "ns" we have two distinct values for "r" at a special value of "t". Am I wrong?

13.3.mw @Preben Alsholm 

Dear Preben! Thanks for your reply. It was the first time that I used "Branch, Ask a related question" because my question was related to the previous one. I thought this is the case. Otherwise I will be please if you guide me.

By the way I will upload my file. My question is why the curve changes when I extend the range of "t".

Thanks.

Dear Markiyan Hirnyk 4853

I have been faced with a new problem in my work. I have understanded that if I change the range of "t" I will obtain different results. I'm very confused. For example when I run

plot([A(t),B(t),t=a..b]);

I will obtain a graph and when I run

plot([A(t),B(t),t=c..b]); (for c<a)

I get a different graph. I expect the two lines(graphs) are the same at least in the range a..b, but they differ even in these same regions. What is the problem?

Thanks.

Dear Markiyan Hirnyk 4853

I have been faced with a new problem in my work. I have understanded that if I change the range of "t" I will obtain different results. I'm very confused. For example when I run

plot([A(t),B(t),t=a..b]);

I will obtain a graph and when I run

plot([A(t),B(t),t=c..b]); (for c<a)

I get a different graph. I expect the two lines(graphs) are the same at least in the range a..b, but they differ even in these same regions. What is the problem?

Thanks.

@Carl Love 

what is hypergeom can i write the answer in terms of functions like sin orexp

@Carl Love 

what is hypergeom can i write the answer in terms of functions like sin orexp

Dear Carl Love 2145

thanks for your answer  my assumption is 0 < f < 1 but when i subsitutead in program i did not get answer. what can i do?

Dear Carl Love 2145

thanks for your answer  my assumption is 0 < f < 1 but when i subsitutead in program i did not get answer. what can i do?