Differentiation operator does not evaluate symbolically - Translate a differential operator from SMath to Maxima Options  Email this topic  Watch this topic  Print this topic » Normal Threaded

Previous Topic Next Topic

Alvaro Gavilán		#1 Posted : 31 May 2020 03:46:04(UTC)
Rank: Advanced Member Groups: Registered Joined: 16/04/2020(UTC) Posts: 65 Location: France Was thanked: 25 time(s) in 16 post(s)		Hello, Do you know why or what could be the problem for SMath not translating properly a dy/dx. I need to write these operators in Maxima to solve a differential equation... Thanks in advance, Alvaro Differentiation.sm (10kb) downloaded 7 time(s). Edited by user 31 May 2020 06:16:46(UTC)  | Reason: Not specified
		WWW
User Profile View All Posts by User View Thanks

	Wanna join the discussion?! Login to your SMath Studio Forum forum account. New Registrations are disabled.

Alvaro Gavilán		#2 Posted : 31 May 2020 04:23:02(UTC)
Rank: Advanced Member Groups: Registered Joined: 16/04/2020(UTC) Posts: 65 Location: France Was thanked: 25 time(s) in 16 post(s)		I have found a workaround, with eval_string() from Maxima. Differentiation.sm (14kb) downloaded 11 time(s).
		WWW
User Profile View All Posts by User View Thanks

Razonar		#3 Posted : 31 May 2020 05:55:54(UTC)
Rank: Advanced Member Groups: Registered Joined: 28/08/2014(UTC) Posts: 1,356 Was thanked: 815 time(s) in 516 post(s)		Originally Posted by: Alvaro Gavilá Hello, Do you know why or what could be the problem for SMath not translating properly a dy/dx. I need to write these operators in Maxima to solve a differential equation... ... Hola tocayo. Is this the problem?: always it is diff(y,x)=0, but diff(y(x),x) remains unevaluated and is the correct form to express the derivative of a function. Best regards. Alvaro.
1 user thanked Razonar for this useful post.		on 31/05/2020(UTC)
User Profile View All Posts by User View Thanks

Alvaro Gavilán		#4 Posted : 31 May 2020 06:16:30(UTC)
Rank: Advanced Member Groups: Registered Joined: 16/04/2020(UTC) Posts: 65 Location: France Was thanked: 25 time(s) in 16 post(s)		Hola tocayo, muchas gracias! Problem solved:
		WWW
User Profile View All Posts by User View Thanks

Jean Giraud		#5 Posted : 31 May 2020 14:12:03(UTC)
Rank: Guest Groups: Registered Joined: 04/07/2015(UTC) Posts: 6,866 Was thanked: 981 time(s) in 809 post(s)		You are mixing two CAS that will not pass QA [Quality Assurance]. My understanding is that what was usable from Maxima is native in Smath. Smath native derivative operator works from book library. sin(x), ln(x), exp(x) ... OK Gamma(x), erf(x) ... zap. We have them otherwise. Cheers ... Jean Differentiation.sm (18kb) downloaded 24 time(s).
User Profile View All Posts by User View Thanks

Alvaro Gavilán		#6 Posted : 31 May 2020 16:29:55(UTC)
Rank: Advanced Member Groups: Registered Joined: 16/04/2020(UTC) Posts: 65 Location: France Was thanked: 25 time(s) in 16 post(s)		Thank you Jean, I am trying to test some symbolic solutions of differential equations just for a course video where I show some of the capabilities that are not present in Mathcad (Prime).
		WWW
User Profile View All Posts by User View Thanks

Jean Giraud		#7 Posted : 31 May 2020 18:42:32(UTC)
Rank: Guest Groups: Registered Joined: 04/07/2015(UTC) Posts: 6,866 Was thanked: 981 time(s) in 809 post(s)		Originally Posted by: Alvaro Gavilá Thank you Jean, I am trying to test some symbolic solutions of differential equations just for a course video where I show some of the capabilities that are not present in Mathcad (Prime). Very few DE have symbolic solutions, unless from Handbooks. Few of them are available in Smath ... will be back on that.
User Profile View All Posts by User View Thanks

Jean Giraud		#8 Posted : 01 June 2020 00:46:56(UTC)
Rank: Guest Groups: Registered Joined: 04/07/2015(UTC) Posts: 6,866 Was thanked: 981 time(s) in 809 post(s)		Originally Posted by: Alvaro Gavilá I am trying to test some symbolic solutions of differential equations just for a course video where I show some of the capabilities that are not present in Mathcad (Prime). If Mathcad Prime does not solve those attached ... Oh ! Cheers ... Jean. ODE Symbolic 4_Flies.sm (131kb) downloaded 20 time(s). ODE Symbolic Bernoulli.sm (12kb) downloaded 15 time(s). ODE_Laplace 1rst [Type 2].sm (23kb) downloaded 10 time(s). ODE Symbolic Verhulst [Logistic].sm (26kb) downloaded 8 time(s). ODE Symbolic Lambert.sm (22kb) downloaded 10 time(s). ODE_Laplace 1rst [Type 1].sm (25kb) downloaded 12 time(s). ODE_Laplace 2nd [Type 3].sm (35kb) downloaded 9 time(s). ODE Symbolic Eiffel.sm (22kb) downloaded 11 time(s).
User Profile View All Posts by User View Thanks

Users browsing this topic

Guest