Dear Jason, I think my code is short, but I will have to ask my son how to attach a file to gmail. Thanks, Peter
On Sat 29. Jan 2022 at 17:09, Jason Moore <[email protected]> wrote: > Peter, > > The ideal way to do this is to paste the code into the email or in a > Github discussion. Making the code as short as possible to demonstrate the > issues is also helpful. > > Here is a good example: https://github.com/sympy/sympy/discussions/22848 > > Jason > moorepants.info > +01 530-601-9791 > > > On Sat, Jan 29, 2022 at 11:07 AM Peter Stahlecker < > [email protected]> wrote: > >> Dear Jason, >> I had to send it by separate mail, as I di not know how to attach a file >> to gmail.😩😩😩 >> Thanks, Peter >> >> On Sat 29. Jan 2022 at 15:48, Jason Moore <[email protected]> wrote: >> >>> Peter, >>> >>> You'll have to share your code for us to help, as this isn't enough >>> information. >>> >>> Jason >>> moorepants.info >>> +01 530-601-9791 >>> >>> >>> On Sat, Jan 29, 2022 at 9:50 AM Peter Stahlecker < >>> [email protected]> wrote: >>> >>>> I try to model a simple one mass point pendulum in 3D, the mass point >>>> is located on the y - axis, at a distance d. Rotations around the y-axis do >>>> not make physical sense, hence, I use only qx, qz to describe the angles of >>>> rotation of the frame of m. >>>> >>>> If MM is the mass matrix, I get determinant(M) = 0. >>>> As this pendulum is so simple, I do not think I made a mistake modeling >>>> it. >>>> What could be the problem? >>>> >>>> Thanks for any help! >>>> >>> -- >>>> You received this message because you are subscribed to the Google >>>> Groups "sympy" group. >>>> To unsubscribe from this group and stop receiving emails from it, send >>>> an email to [email protected]. >>>> To view this discussion on the web visit >>>> https://groups.google.com/d/msgid/sympy/44eb551f-453a-47a6-ba23-335b32fd15e9n%40googlegroups.com >>>> <https://groups.google.com/d/msgid/sympy/44eb551f-453a-47a6-ba23-335b32fd15e9n%40googlegroups.com?utm_medium=email&utm_source=footer> >>>> . >>>> >>> -- >>> You received this message because you are subscribed to the Google >>> Groups "sympy" group. >>> To unsubscribe from this group and stop receiving emails from it, send >>> an email to [email protected]. >>> To view this discussion on the web visit >>> https://groups.google.com/d/msgid/sympy/CAP7f1AhLe%2Bz2%3DH-0oEt%3DOeKYrjf%2B4LWN_zArxPc1sF2yu7jypg%40mail.gmail.com >>> <https://groups.google.com/d/msgid/sympy/CAP7f1AhLe%2Bz2%3DH-0oEt%3DOeKYrjf%2B4LWN_zArxPc1sF2yu7jypg%40mail.gmail.com?utm_medium=email&utm_source=footer> >>> . >>> >> -- >> Best regards, >> >> Peter Stahlecker >> >> -- >> You received this message because you are subscribed to the Google Groups >> "sympy" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to [email protected]. >> > To view this discussion on the web visit >> https://groups.google.com/d/msgid/sympy/CABKqA0YJ9Oa6TQy%2BMDuBGP6FqduhRjfGJKDkz7czMRKz1qrDTQ%40mail.gmail.com >> <https://groups.google.com/d/msgid/sympy/CABKqA0YJ9Oa6TQy%2BMDuBGP6FqduhRjfGJKDkz7czMRKz1qrDTQ%40mail.gmail.com?utm_medium=email&utm_source=footer> >> . >> > -- > You received this message because you are subscribed to the Google Groups > "sympy" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To view this discussion on the web visit > https://groups.google.com/d/msgid/sympy/CAP7f1Ai_8qmJjpUTp%3DYrD6_cii4veTm6uC7kr05BMQxva-grqQ%40mail.gmail.com > <https://groups.google.com/d/msgid/sympy/CAP7f1Ai_8qmJjpUTp%3DYrD6_cii4veTm6uC7kr05BMQxva-grqQ%40mail.gmail.com?utm_medium=email&utm_source=footer> > . > -- Best regards, Peter Stahlecker -- You received this message because you are subscribed to the Google Groups "sympy" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/sympy/CABKqA0Znvyr1%3Dh8avNJ4%2BeM%2B2qEGN7rjqRjje%2BpEjrMHdi-PAQ%40mail.gmail.com.
