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#2475 limit(x^(mu/x^g),x,inf) --> error

None
closed
Dan Gildea
None
5
2013-06-01
2012-10-04
Barton Willis
No

(%i1) limit(x^(mu/x^g),x,inf);
"Is "g" positive, negative, or zero?"pos;
"Is "mu" positive, negative, or zero?"pos;
Maxima encountered a Lisp error:
Unhandled case in tvar-lim
Automatically continuing.
To enable the Lisp debugger set *debugger-hook* to nil.

Discussion

  • Dan Gildea
    Dan Gildea
    2013-06-01

    Fixed in git:

    Fix #2536 Lisp error in limit: "bad gvar lim"
    Fix #2475 limit(x^(mu/x^g),x,inf) --> error

    src/hayat.lisp:
    o tvar-lim: call tay-error instead of error
    o pslog: call tay-error instead of error

    For both bug reports, taylor series now fails, but without giving
    a user error.

    limit(x^(mu/x^g),x,inf) now returns nounform,

    bar : (9log((-1)^n/%phi^n-%phi^n)-9log(5)/2+log(-1))
    /log((%phi^(9n)-(-1)^(9n)/%phi^(9n))/sqrt(5)
    -((-1)^n/%phi^n-%phi^n)
    ((-1)^(8n)/%phi^(8n)-%phi^(8*n))/5)$
    limit (bar, n, inf);
    now returns one.

     
  • Dan Gildea
    Dan Gildea
    2013-06-01

    • status: open --> closed
    • assigned_to: Dan Gildea
    • Group: --> None