escorpsy

Jacobe supta

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9 years, 338 days

MaplePrimes Activity


These are replies submitted by escorpsy

@ecterrab for R^ab R_ab , is Ricci[alpha,beta].Ricci[alpha,beta] correct ?

@ecterrab i uptodated my maple to 18 and its works. thx so much , its illustrative. what about R^ab R_ab ?

@ecterrab  thank you very much , but the first line gave the error, (in physics:-setup) wrong left-hand-side in metric = dtheta^2+sin(theta)^2 dphi^2, quite):

@Torre  what about R^ab R_ab ? . acutually i didnt understand the role of 1 in (g,R,[1]) and i dont know how to calculate other components of ricci or rieman tensor. if you can explain and apply the method of using of these commands with a simple metric ,i really appreciate. 

@Torre  thank you for your help. how to find riemann tensor components ? e.g R_φθφθ . and ricci tensor components.

dynamical system :

 

maple.mw 
 
 

Download maple.mw

@Preben Alsholm brilliant work ! appreciate what you have done .

@Preben Alsholm brilliant work ! appreciate what you have done .

@PatrickT thank you for your help.

@PatrickT thank you for your help.

@Preben Alsholm thanks .i am curious too see can we plot a diagram for our two critical points , as the photo i attached ?for e.g. , the saddle point ?

 

 

 

thank you for your time

 

best regards

 

 

jacobe

 

 

@Preben Alsholm thanks .i am curious too see can we plot a diagram for our two critical points , as the photo i attached ?for e.g. , the saddle point ?

 

 

 

thank you for your time

 

best regards

 

 

jacobe

 

 

i've got the point you indicated , thank you so much .

and i think we can plot the 2D phase space for xy with z=0 . or z=-5/8 , am i right ?

 

 

regards

 

jacobe

 

i've got the point you indicated , thank you so much .

and i think we can plot the 2D phase space for xy with z=0 . or z=-5/8 , am i right ?

 

 

regards

 

jacobe

 

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