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 (9.34 KiB) downloaded 898 time(s).

I have found a workaround, with eval_string() from Maxima.



Differentiation.sm (13.39 KiB) downloaded 893 time(s).

Wrote

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.

Hola tocayo, muchas gracias!

Problem solved:

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 (17.82 KiB) downloaded 907 time(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).

Wrote

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.

Wrote

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 (130.62 KiB) downloaded 914 time(s).
ODE Symbolic Bernoulli.sm (11.38 KiB) downloaded 945 time(s).
ODE_Laplace 1rst [Type 2].sm (22.68 KiB) downloaded 724 time(s).
ODE Symbolic Verhulst [Logistic].sm (25.55 KiB) downloaded 790 time(s).
ODE Symbolic Lambert.sm (21.81 KiB) downloaded 927 time(s).
ODE_Laplace 1rst [Type 1].sm (24.7 KiB) downloaded 746 time(s).
ODE_Laplace 2nd [Type 3].sm (34.62 KiB) downloaded 803 time(s).
ODE Symbolic Eiffel.sm (21.45 KiB) downloaded 889 time(s).