On Sat, Oct 3, 2009 at 2:20 PM, William Sit <[email protected]> wrote:
>
> I can't do much with the tan problem, since we have:
>
> solve([tan(b) = a],[b])
>>>
>>> Error detected within library code:
>
> No identity element for reduce of empty list using operation
> append
>
> (You mileage may differ, since I am using a very old version of Axiom).
>
> This is clearly a bug, for the old version.
>
Both Axiom (February 2009) and OpenAxiom (current) return
(1) -> solve([tan(b) = a],[b])
(1) []
Type: List List Equation Expression Integer
But FriCAS gives:
wsp...@debian:~$ fricas -nox
FriCAS (AXIOM fork) Computer Algebra System
Version: FriCAS 2009-09-17
Timestamp: Wednesday September 30, 2009 at 22:17:16
-----------------------------------------------------------------------------
Issue )copyright to view copyright notices.
Issue )summary for a summary of useful system commands.
Issue )quit to leave FriCAS and return to shell.
-----------------------------------------------------------------------------
(1) ->
(1) -> solve([tan(b) = a],[b])
(1) [[b= 0]]
Type: List(List(Equation(Expression(Integer))))
(2) ->
Regards,
Bill Page.
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