mehdi jafari

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7 years, 156 days

MaplePrimes Activity

These are replies submitted by mehdi jafari

@Sergey Moiseev whats does options means? i can not search  them in maple help...
 checkexit=10 ?

@tomleslie tnx for your quick answer, please change it to an answer , tnx alot.

@Adri van der Meer tnx for your answer , but actually i want the value for all unknown parameters which will maximize the PP;
i.e, what will be the values for, theta[1],theta[2],phi[1],phi[2],p in which the expression pp will be maximized ?


@ecterrab really thank you,i really appreciate your complete answer. I think i need to read help more delicately. Tnx

@ecterrab tnx for your quick and complete answer. actually from your complete description i got the answer, as i think , this derivative :  d_[nu](Psi(X))  converts scalar function Psi(X) to a vector or first order tensor is that right ? how can i recognize a sacalar from tensor in maple ? is there any command in maple for recognizing that?

@ecterrab i think you misunderstood my opinion. 

at first i should appreciate your good work and maple staffs. actually i think maple is one of the best mathematical softwares and i suggest using this to as many people as i can. The most important and unique feature of maple is here, this site ! As far as i know, Maple it the only software on the planet that people can talk directly to staff. and it is the most important parameter for choosing a software in my opinion...

if i said my suggestion it was just and just for the software to get better ... and not for my needings,,,, and as u said, it was not for thing that i wanted !

afterall, i really happy to get familiar with maple, with professional programmers and with respecftul staffs like u. actually it is an honor for me talking directly with professional staffs like you.
please accept my respecftul apologize if i gave my opinion in a wrong way.
sincerely yours...

Ph.D candidate of Mechanical engineering field.

@Axel Vogt it is interesting when using simplify(exp(a)*exp(b)*exp(c), {a+b+c=0}); it does not returns 1 ! and it needs an extra simplification !











@ecterrab can this type of assumption for functions that can test their arguments for assumptions be included for all type of functions in next versions ?! for example for trangular functions , exp , logarithm and ,,,, ?
i think it will be great for physics package !

@vv really tnx, it is working perfectly

@Preben Alsholm tnx for your help and answer .

actually Z and R are different directions and thus indendepnt parameters,

Xstar is a paramatere dependet to Boundary Y 
from the last BC we conclude :
Y(T,1)=(Xstar)^n -> Xstar=Y(T,1)^(1/n) .

can not solve this problem using maple ?! what is th idea for solving this problem with and witouth maple !?

@Carl Love for example ( not surely correct example ) i say if -0.12a<a<0.08  and -0.44<c<-0.02 and b in sth like them, how many inervals can be found for my three variables that my answers are real ? the varibale are allowed to vary between -1 and 1 , but what are the intervals for each varibale that in those intervals,the answers are real ?
how many intervals exist in which the result is real ? can we find group of intervals for each varibale that in those intervals the answers are real ? for example
group one ={ <a< , <b< , <c< } -> the answers are real 

group two = { .... } sth like this, -> the answers are real  

and ....
what are the groups of intervals in which the answers are real .

@acer @Carl Love can i find the exact intervals of each variable for which it has real answer ?
the varibale can change between -1 and 1 , but what are intervals for each varibale for which the answer is real ? how many intervals are there for the vrabiles for which the answer in them are surely real ?

please change e to exp() and specify the varibales, are your variables theta[1](t) or theta[1] ?
please make correction about the varibales . and then speciify the equation which are going to be solved simultaneously. after all . u can use the command like this : 
dsolve( {eq[1],eq[2],eq[3]});
or after correction , please upload your new sheet again.

@Kitonum it is exactly what i needed

what is your problem exactly ? post your mw code so that we can help

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