def apply_check(self, x, y, evaluation):
'Power[x_, y_]'
# Power uses _MPMathFunction but does some error checking first
if isinstance(x, Number) and x.is_zero:
if isinstance(y, Number):
y_err = y
else:
y_err = Expression('N', y).evaluate(evaluation)
if isinstance(y_err, Number):
py_y = y_err.round_to_float(permit_complex=True).real
if py_y > 0:
return x
elif py_y == 0.0:
evaluation.message('Power', 'indet',
Expression('Power', x, y_err))
return Symbol('Indeterminate')
elif py_y < 0:
evaluation.message('Power', 'infy',
Expression('Power', x, y_err))
return Symbol('ComplexInfinity')
result = self.apply(Expression('Sequence', x, y), evaluation)
if result is None or result != Symbol('Null'):
return result
def apply_check(self, x, y, evaluation):
"Power[x_, y_]"
# Power uses _MPMathFunction but does some error checking first
if isinstance(x, Number) and x.is_zero:
if isinstance(y, Number):
y_err = y
else:
y_err = Expression(SymbolN, y).evaluate(evaluation)
if isinstance(y_err, Number):
py_y = y_err.round_to_float(permit_complex=True).real
if py_y > 0:
return x
elif py_y == 0.0:
evaluation.message("Power", "indet",
Expression("Power", x, y_err))
return Symbol("Indeterminate")
elif py_y < 0:
evaluation.message("Power", "infy",
Expression("Power", x, y_err))
return Symbol("ComplexInfinity")
if isinstance(x, Complex) and x.real.is_zero:
yhalf = Expression("Times", y, Rational(1, 2))
factor = self.apply(Expression("Sequence", x.imag, y), evaluation)
return Expression("Times", factor,
Expression("Power", Integer(-1), yhalf))
result = self.apply(Expression(SymbolSequence, x, y), evaluation)
if result is None or result != SymbolNull:
return result
def apply_check(self, x, y, evaluation):
'Power[x_, y_]'
# Power uses _MPMathFunction but does some error checking first
if isinstance(x, Number) and x.is_zero:
if isinstance(y, Number):
y_err = y
else:
y_err = Expression('N', y).evaluate(evaluation)
if isinstance(y_err, Number):
py_y = y_err.round_to_float(permit_complex=True).real
if py_y > 0:
return x
elif py_y == 0.0:
evaluation.message('Power', 'indet', Expression('Power', x, y_err))
return Symbol('Indeterminate')
elif py_y < 0:
evaluation.message('Power', 'infy', Expression('Power', x, y_err))
return Symbol('ComplexInfinity')
result = self.apply(Expression('Sequence', x, y), evaluation)
if result is None or result != Symbol('Null'):
return result
