Open rtoy opened 2 months ago
Imported from SourceForge on 2024-07-05 23:38:35 Created by peterpall on 2023-04-30 07:51:45 Original: https://sourceforge.net/p/maxima/bugs/4136/#33e4
Imported from SourceForge on 2024-07-05 23:38:38 Created by rtoy on 2023-04-30 14:04:58 Original: https://sourceforge.net/p/maxima/bugs/4136/#b870
One point. You assume that L_Cable*(4*C_In*R_Load^2-L_Cable)
is positive. But maxima is asking for the sign of L_Cable*4*C_In*R_Load^2-L_Cable
. These aren't the same.
Imported from SourceForge on 2024-07-05 23:38:42 Created by peterpall on 2023-04-30 19:50:22 Original: https://sourceforge.net/p/maxima/bugs/4136/#b870/3bbd
I drag-and-dropped this from a maxima session. If I do that again I get:
Is L_Cable*(4*C_In*R_Load^2-L_Cable) positive, negative or zero?
which matches the assume() I did before.
Imported from SourceForge on 2024-07-05 23:38:45 Created by robert_dodier on 2023-11-04 23:04:08 Original: https://sourceforge.net/p/maxima/bugs/4136/#db43
Imported from SourceForge on 2024-07-05 23:38:34 Created by peterpall on 2023-04-30 07:11:36 Original: https://sourceforge.net/p/maxima/bugs/4136
First we define a differential equations and make sure that the thing desolve will have to warn about is true:
If we now run a desolve() the desolve() asks the thing we told assume(), but the assume() database cannot find it. For some reason I seem to be able to get two questions, one that matches the assume() and one that doesn't.
or:
No idea under which condition I get which of these questions.
If we run an additional expand()
the assume database will be able to provide desolve with the answer of its question.