[Maxima-bugs] [maxima:bugs] #4811 why display overwrites the dt in y2(x)*integrate( .., , t, 0, x) with y1 or is it expected to ?

[Barton W. <wil...@us...>]

If you want a DIY fix, here are two initial steps:

Find the name of the function that displays '%integrate objects:
~~~
(%i2)	:lisp(symbol-plist '%integrate);
(WXXML WXXML-INT OPERS T DISTRIBUTE_OVER NIL OPERATORS SIMPINTEG MSIMPIND NIL

       $OUTATIVE T SIMPLIM%FUNCTION SIMPLIM%INTEGRATE RBP 115 DIMENSION

       DIM-%INTEGRATE TEX TEX-INT NOUN $INTEGRATE)

   ~~~
Print the lambda list for `wxxml-int -- find w:here to insert a space or two. If you are stumped, try asking AI:

   ~~~
       
(%i3)	:lisp(print (describe 'wxxml-int));
MAXIMA::WXXML-INT

  [symbol]

WXXML-INT names a compiled function:

  Lambda-list: (X L R)

  Derived type: FUNCTION

  Source form:

    (LAMBDA (X L R)

      (BLOCK WXXML-INT

        (LET ((S1 (WXXML (CADR X) NIL NIL 'MPAREN 'MPAREN))

              (VAR (WXXML (CADDR X) NIL NIL 'MPAREN ROP)))

          (COND

           ((= (LENGTH X) 3)

            (APPEND L

                    `("<in def=\"false\"><mrow>" ,@S1

                      "</mrow><mrow><s>d</s>" ,@VAR "</mrow></in>")

                    R))

           (T

            (LET ((LOW (WXXML (NTH 3 X) NIL NIL 'MPAREN 'MPAREN))

                  (HI (WXXML (NTH 4 X) NIL NIL 'MPAREN 'MPAREN)))

              (APPEND L

                      `("<in><mrow>" ,@LOW "</mrow><mrow>" ,@HI

                        "</mrow><mrow>" ,@S1 "</mrow><mrow><s>d</s>"

                        ,@VAR "</mrow></in>")

                      R)))))))

NIL 

NIL
~~~
Let us know what you discover.


---

**[bugs:#4811] why display overwrites the dt in y2\(x\)\*integrate\( ..,,t,0,x\) with y1 or is it expected to ?**

**Status:** open
**Group:** None
**Created:** Tue Jul 07, 2026 12:40 PM UTC by dan hayes
**Last Updated:** Tue Jul 07, 2026 04:21 PM UTC
**Owner:** nobody


build_info()  or bug_report()
WxMaxima version:             26.01.0_MSW
Using wxWidgets version:      wxWidgets 3.2.9
Maxima version:               5.49.0
Maxima build date:            2026-01-02 21:27:51
Host type:                    x86_64-w64-mingw32
System type:                  Win32 10.0.19041 X86-64
Lisp implementation type:     SBCL
Lisp implementation version:  2.6.0

"branch_5_44_base_231_g5c411f69f",timestamp="2021-01-12 23:51:42",host="x86_64-w64-mingw32",lisp_name="SBCL",lisp_version="2.0.0",maxima_userdir="C:/Users/zmth1/maxima",maxima_tempdir="C:/Users/zmth1/AppData/Local/Temp",maxima_objdir="C:/Users/zmth1/maxima/binary/branch_5_44_base_231_g5c411f69f/sbcl/2_0_0",maxima_frontend="wxMaxima",maxima_frontend_version="20.12.2-DevelopmentSnapshot_MSW_OpenMP201511+Locks")

[kill(y1,p,x,x0,t,y2),"y2"=y2:integrate(exp(-integrate(p(s),s,x0,t))/y1(t)^2,t,x0,x)*y1(x),"    dy2/dx"=dy2dx:diff(y2,x),"  d^2y2/dx^2"=diff(y2,x,2)];
Why the display overwrites the dt with y1 or i mean they are written on top of each other.
Does it display the same overwriting on your computer display ?  I don't want the grind output format.
Is there another way to do it using print... or whatever ?


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