Hello,

Why does the following work as expected...

f__c := proc (x__0, y__0) options operator, arrow; piecewise(x__0^2+y__0^2 <= 1 and (x__0-1)^2+y__0^2 <= 1 and x__0^2+(y__0-1)^2 <= 1 and (x__0-1)^2+(y__0-1)^2 <= 1, 1, not (x__0^2+y__0^2 <= 1 and (x__0-1)^2+y__0^2 <= 1 and x__0^2+(y__0-1)^2 <= 1 and (x__0-1)^2+(y__0-1)^2 <= 1), 0) end proc

But the following does not?

cnd := x__0^2+y__0^2 <= 1 and (x__0-1)^2+y__0^2 <= 1 and x__0^2+(y__0-1)^2 <= 1 and (x__0-1)^2+(y__0-1)^2 <= 1
f__c := proc (x__0, y__0) options operator, arrow; piecewise(cnd, 1, not cnd, 0) end proc

(Sorry about the lack of formatting, the forum insists my Maple syntax is invalid)

The first one produces the expected result, x__0 and y__0 are treated as variables in the condition (i.e. f__c(a, b) returns the same piecewise function with x__0 replaced with a and y__0 replaced with b); the second one does not (i.e. f__c(a, b) returns the piecewise function, still with x__0 and y__0 in the condition, and never gets evaluated).

Dear all

I have a system of PDes, the code i think it's well writte but when I use pdesolve i have no solution obtained.

Maybe I must add something else

Many thinks

sysPDes.mw

I am defining, 

f(x):= x-> diff(g(x),x)/(1+g(x))

Here g(x)<<1 and I am looking for series expansion, 1/(1+g(x)) = 1- g(x) + g(x)^2 etc.

But I cannot get this by using series(f(x),g(x)=0) or other options.

Thanks,

Rahul

Is there a way to remove the parentheses around y'(t)?

Thank you!

mapleatha
 

With Typesetting level set to Maple Standard, x->(f@g)(x) is displayed as x->f@g(x), which is wrong because composition has lower precedence than function application.

sum((-1)^k/k^(1/2), k = 2 .. infinity);
Error, (in polylog) numeric exception: division by zero

how can filter data im maple 18 befor used in draw plot? i need simple example

this is plot of f(x)=x² (by used maple18) ,how can me change (2.5-, 1.5- ,0.5-) in x-axis to true?

Anybody know how to compute coding for eigenvalues for basic reproduction number using the next generation matrix?

I dont know how to compute coding for eigenvalues. 

Coding_Basic_Reproduction_Number.mw

Hello people in mapleprimes,

I have a question.
I want to modify

a := rho^(epsilon-1)*a__01^(-k)*(N__E2/Omega+N__E1*mu)*(K+1)/mu;
to
b:=rho^(epsilon-1)*a__01^(-k)*(N__E2/(Omega*mu)+N__E1)*(K+1);

But, I can't do that modification.

The key term is
c:=N__E2/Omega+N__E1*mu;

I know how to use applyop, but even if I use it, I couldn't obtain b.

Please teach me about this.

Nov_22_2017_1_mapleprimes.mw

Hello everyone!

Total beginner here. So far I am just using the right click options in Maple,  and worked wonderfully until now.

Two questions for some charitable sould out there:

1) I have a system of inequalities that I need to solve. I am interested in the *conditions between the variables under which a given inequality is satisfied*.

Using the "solve" command I only get a few of these. Do you know any script that can obtain more solutions? 

2) I have some (long) equations and want to be able to visualize them in different ways to make sense of it. So far I have only been using "simplify" and "combine", but it keeps on returning the same result even if I can see there are other possible ways of factoring the equation. How can I tell Maple to give me "different optiosn" as to visualize the equation?

Thank you all!!

I am working on a problem collaboratively with someone that uses mathematica, and he is getting different input for the expression i have referred to in formal notation.

I found the MmaTranslator package, and see that there is a FromMma command, but i need to convert my maple input to mathematica so that he is able to work with the same expression in an interface familair to him.

Thankyou in advance for your cooperation and assistance

Hello people in mapleprimes,

I want to know some way, if there is, to do the modification of the following, that is

The original expression: (beta*L__1/P)^beta*((1-beta)*L__1)^(1-beta)
The expression after modification: beta^beta*L__1*(1/P)^beta*(1-beta)^(1-beta)

I did this with freezing (1-beta) in (1-beta)*L__1.
But, this is a little long code. I will be glad if you tell me some more simple way to do this.

Thanks in advance.

nov_21_2017_mapleprimes.mw

how to integrate this integral

g := simplify(int((s^3-5*s^2+1)/(s+2)^2, s = 0 .. x))

Hey guys...

One of my favorite new images rendered in Maple.....

integrates mod congruency arguments like the following, into an 8 stage animated 3D cylindrical coordinates context::

u*mod(x^(1/3)cos(x),23)