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A
AlvaroDíaz12-Amethyst
12-Amethyst
September 20, 2016
Solved

Symbolic lsolve

  • September 20, 2016
  • 32 replies
  • 10776 views

Hi.

¿There are a way to catch the values for this kind of lsolve?

Thanks in advance.

Alvaro.

lsolve.gif

Best answer by Fred_Kohlhepp

32 replies

F
Fred_Kohlhepp23-Emerald IAnswer
23-Emerald I
September 20, 2016

    A
    AlvaroDíaz12-AmethystAuthor
    12-Amethyst
    September 20, 2016

    Hi Fred.

    Thanks for your reply. I don't have any idea about why your proceducre doesn't converge but mine yes.

    Best regards.

    Alvaro.

    R
    RichardJ19-Tanzanite
    19-Tanzanite
    September 20, 2016

    It doesn't converge to a solution for me either.

    I don't see any easy way to split the two symbolic solutions out. The only approach I can think of is to use the automation interface to read the XML of the region and then create the vectors in two other regions.

      V
      ValeryOchkov24-Ruby IV
      24-Ruby IV
      September 20, 2016

      Three pictures from the book Физико-математические этюды с Mathcad и Интернет

        A
        AlvaroDíaz12-AmethystAuthor
        12-Amethyst
        September 21, 2016

        I don't see that book, it's excelent. Thanks Valery.

        Alvaro.

        V
        ValeryOchkov24-Ruby IV
        24-Ruby IV
        September 21, 2016

        AlvaroDíaz написал(а):

        I don't see that book, it's excelent. Thanks Valery.

        Alvaro.

        You can download the book and translate it into English or Spain

        http://twt.mpei.ac.ru/ochkov/T-2016/PhysMathStudies.pdf

          W
          Werner_E25-Diamond I
          25-Diamond I
          September 20, 2016

          I see no easy way to get hold on the two vectors of the symbolic result, but I get the very same result as shown in the picture by Alvaro when I load his sheet in Mathcad M030.

          Not sure which releases are used by Alvaro, Fred and Richard.

          In Prime 3.0 I experience the same as Fred has shown.

          R
          RichardJ19-Tanzanite
          19-Tanzanite
          September 20, 2016

          I use M045. Why are you still using M030?

          A
          AlvaroDíaz12-AmethystAuthor
          12-Amethyst
          September 21, 2016

          HI Richard. Mathcad M040. Is the edition that use almost all the students.

          Best regards

          Alvaro.

          A
          AndyWesterman12-Amethyst
          12-Amethyst
          September 21, 2016

          There are only 2 independent equations , so Isolve is just catching a solution in the numeric processor, but the symbolic processor is properly calculating the determinant as 0 & failing to find a single solution

          Capture.PNG

          the symbolic engine can be persuaded to find this solution , but it's not easy.

          Capture.PNG

          (attachment is in Prime 2)

          Why the other methods don't work I don't know...

          Any suggestions??

          Regards

          Andy

            V
            VladimirN24-Ruby IV
            24-Ruby IV
            September 21, 2016

            Alvaro,

            "Symbolic result is an invalid Prime expression". Well, what can we say? Express yourself !

            And here is result in Mathcad Prime 3.1 version:

            Pic_1.png

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