There seems to be something strange. I get division by zero on integrate.
I try again the same command, and then it works. I try again, get the error
again.
might have to try few times.
Here is log. It seems by chance. It looks like one call caches something
in memory, which can affect the next call.
-----------------------------------------------
(6) -> ii:=integrate((x*(2*a - 1) - a)/((x - a)*sqrt(x^3*(2*a - 1) -
x^2*(a^2 + 2*a - 1) + a^2*x)), x)
(6)
+--------------------------------------+
| 3 2 2 2 2 2
- 2 \|(2 a - 1)x + (- a - 2 a + 1)x + a x + x + (2 a - 2)x - a
log(--------------------------------------------------------------------)
2 2
x - 2 a x + a
Type:
Union(Expression(Integer),...)
(7) -> ii:=integrate((x*(2*a - 1) - a)/((x - a)*sqrt(x^3*(2*a - 1) -
x^2*(a^2 + 2*a - 1) + a^2*x)), x)
(7)
+--------------------------------------+
| 3 2 2 2 2 2
- 2 \|(2 a - 1)x + (- a - 2 a + 1)x + a x + x + (2 a - 2)x - a
log(--------------------------------------------------------------------)
2 2
x - 2 a x + a
Type:
Union(Expression(Integer),...)
(8) -> ii:=integrate((x*(2*a - 1) - a)/((x - a)*sqrt(x^3*(2*a - 1) -
x^2*(a^2 + 2*a - 1) + a^2*x)), x)
(8)
+--------------------------------------+
| 3 2 2 2 2 2
- 2 \|(2 a - 1)x + (- a - 2 a + 1)x + a x + x + (2 a - 2)x - a
log(--------------------------------------------------------------------)
2 2
x - 2 a x + a
Type:
Union(Expression(Integer),...)
(9) -> ii:=integrate((x*(2*a - 1) - a)/((x - a)*sqrt(x^3*(2*a - 1) -
x^2*(a^2 + 2*a - 1) + a^2*x)), x)
(9)
+--------------------------------------+
| 3 2 2 2 2 2
- 2 \|(2 a - 1)x + (- a - 2 a + 1)x + a x + x + (2 a - 2)x - a
log(--------------------------------------------------------------------)
2 2
x - 2 a x + a
Type:
Union(Expression(Integer),...)
(10) -> ii:=integrate((x*(2*a - 1) - a)/((x - a)*sqrt(x^3*(2*a - 1) -
x^2*(a^2 + 2*a - 1) + a^2*x)), x)
>> Error detected within library code:
catdef: division by zero
(10) -> ii:=integrate((x*(2*a - 1) - a)/((x - a)*sqrt(x^3*(2*a - 1) -
x^2*(a^2 + 2*a - 1) + a^2*x)), x)
>> Error detected within library code:
catdef: division by zero
(10) -> ii:=integrate((x*(2*a - 1) - a)/((x - a)*sqrt(x^3*(2*a - 1) -
x^2*(a^2 + 2*a - 1) + a^2*x)), x)
>> Error detected within library code:
catdef: division by zero
(10) -> ii:=integrate((x*(2*a - 1) - a)/((x - a)*sqrt(x^3*(2*a - 1) -
x^2*(a^2 + 2*a - 1) + a^2*x)), x)
(10)
+--------------------------------------+
| 3 2 2 2 2 2
- 2 \|(2 a - 1)x + (- a - 2 a + 1)x + a x + x + (2 a - 2)x - a
log(--------------------------------------------------------------------)
2 2
x - 2 a x + a
Type:
Union(Expression(Integer),...)
(11) ->
1.3.2 on Linux with
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..
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