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Silence initialization of giac #35513

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Apr 23, 2023
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Silence initialization of giac #35513

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599ae9f
Silence initialization of giac
tornaria Apr 8, 2023
656b940
Fix doctest so it works with old and new giac.
tornaria Apr 17, 2023
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4 changes: 1 addition & 3 deletions src/sage/calculus/functional.py
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Expand Up @@ -225,9 +225,7 @@ def integral(f, *args, **kwds):

Sage is now (:trac:`27958`) able to compute the following integral::

sage: result = integral(exp(-x^2)*log(x), x)
...
sage: result
sage: integral(exp(-x^2)*log(x), x) # long time
1/2*sqrt(pi)*erf(x)*log(x) - x*hypergeometric((1/2, 1/2), (3/2, 3/2), -x^2)

and its value::
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4 changes: 1 addition & 3 deletions src/sage/calculus/tests.py
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Expand Up @@ -121,9 +121,7 @@
sage: integrate(sin(x^2),x)
1/16*sqrt(pi)*((I + 1)*sqrt(2)*erf((1/2*I + 1/2)*sqrt(2)*x) + (I - 1)*sqrt(2)*erf((1/2*I - 1/2)*sqrt(2)*x) - (I - 1)*sqrt(2)*erf(sqrt(-I)*x) + (I + 1)*sqrt(2)*erf((-1)^(1/4)*x))

sage: result = integrate((1-x^2)^n,x)
...
sage: result
sage: integrate((1-x^2)^n,x) # long time
x*hypergeometric((1/2, -n), (3/2,), x^2*exp_polar(2*I*pi))
sage: integrate(x^x,x)
integrate(x^x, x)
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4 changes: 1 addition & 3 deletions src/sage/libs/giac/giac.pyx
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Expand Up @@ -27,8 +27,7 @@ in giac, but the mathematical computation is not done. This class is mainly
for cython users. Here A is a Pygen element, and it is ready for any giac
function.::

sage: from sage.libs.giac.giac import * # random
//...
sage: from sage.libs.giac.giac import *
sage: A = Pygen('2+2')
sage: A
2+2
Expand Down Expand Up @@ -2012,7 +2011,6 @@ class GiacFunctionNoEV(Pygen):
# Some convenient settings
############################################################
Pygen('printpow(1)').eval() # default power is ^
Pygen('add_language(1)').eval() # Add the french keywords in the giac library language.
# FIXME: print I for sqrt(-1) instead of i
# GIAC_try_parse_i(False,context_ptr); (does not work??)

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4 changes: 1 addition & 3 deletions src/sage/symbolic/integration/integral.py
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Expand Up @@ -663,9 +663,7 @@ def integrate(expression, v=None, a=None, b=None, algorithm=None, hold=False):

where the default integrator obtains another answer::

sage: result = integrate(f(x), x)
...
sage: result
sage: integrate(f(x), x) # long time
1/8*sqrt(x)*gamma(1/4)*gamma(-1/4)^2*hypergeometric((-1/4, -1/4, 1/4), (1/2, 3/4), -1/x^2)/(pi*gamma(3/4))

The following definite integral is not found by maxima::
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