I am not sure of the exact cause but it seems the interpreter is doing
a particularly bad job of imputing the types. The follow alternatives
work:
(1) -> integrand:Expression Complex
Integer:=1/2*2^(1/2)*1/(1+x)^2/(-%i+x^2)^(1/2)+1/2/(1+x)^2*2^(1/2)/(%i+x^2)^(1/2)
+-------+ +-------+
+-+ | 2 +-+ | 2
\|2 \|x + %i + \|2 \|x - %i
(1) ------------------------------------
+-------+ +-------+
2 | 2 | 2
(2 x + 4 x + 2)\|x - %i \|x + %i
Type: Expression(Complex(Integer))
(2) -> )cl co
All user variables and function definitions have been cleared.
All )browse facility databases have been cleared.
Internally cached functions and constructors have been cleared.
)clear completely is finished.
(1) -> integrand:Expression
Integer:=1/2*2^(1/2)*1/(1+x)^2/(-sqrt(-1)+x^2)^(1/2)+1/2/(1+x)^2*2^(1/2)/(sqrt(-1)+x^2)^(1/2)
+-----------+ +-------------+
+-+ | +---+ 2 +-+ | +---+ 2
\|2 \|\|- 1 + x + \|2 \|- \|- 1 + x
(1) ----------------------------------------------
+-------------+ +-----------+
2 | +---+ 2 | +---+ 2
(2 x + 4 x + 2)\|- \|- 1 + x \|\|- 1 + x
Type: Expression(Integer)
On Sun, Jan 28, 2018 at 3:25 PM, 'Nasser M. Abbasi' via FriCAS -
computer algebra system <[email protected]> wrote:
> Any idea what causes this crash?
>
>>fricas
> viewman not present, disabling graphics
> /bin/sh: 1: exec:
> /home/me/data/fricas/fricas-1.3.2/target/x86_64-linux-gnu/bin/hypertex: not
> found
> Checking for foreign routines
> AXIOM="/home/me/data/fricas/fricas-1.3.2/target/x86_64-linux-gnu"
> spad-lib="/home/me/data/fricas/fricas-1.3.2/target/x86_64-linux-gnu/lib/libspad.so"
> foreign routines found
> openServer result 0
> FriCAS Computer Algebra System
> Version: FriCAS 1.3.2
> Timestamp: Sat Jan 27 17:15:20 CST 2018
> -----------------------------------------------------------------------------
> Issue )copyright to view copyright notices.
> Issue )summary for a summary of useful system commands.
> Issue )quit to leave FriCAS and return to shell.
> -----------------------------------------------------------------------------
>
> Using local database
> /home/me/data/fricas/fricas-1.3.2/target/x86_64-linux-gnu/algebra/compress.daase..
> Using local database
> /home/me/data/fricas/fricas-1.3.2/target/x86_64-linux-gnu/algebra/interp.daase..
> Using local database
> /home/me/data/fricas/fricas-1.3.2/target/x86_64-linux-gnu/algebra/operation.daase..
> Using local database
> /home/me/data/fricas/fricas-1.3.2/target/x86_64-linux-gnu/algebra/category.daase..
> Using local database
> /home/me/data/fricas/fricas-1.3.2/target/x86_64-linux-gnu/algebra/browse.daase..
>
> (1) ->
> integrand:=1/2*2^(1/2)*1/(1+x)^2/(-%i+x^2)^(1/2)+1/2/(1+x)^2*2^(1/2)/(%i+x^2)^(1/2)
>
> *** - Program stack overflow. RESET
>
> [/build/buildd/clisp-2.49/src/eval.d:573] reset() found no driver frame
> (sp=0x7fff69c09460-0x7fff69c03400)
> Exiting on signal 6
>
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