2020-04-25 20:09:33 -0500 received badge ● Student (source) 2019-03-21 20:25:13 -0500 received badge ● Popular Question (source) 2018-12-16 14:19:03 -0500 received badge ● Famous Question (source) 2018-12-16 14:19:03 -0500 received badge ● Notable Question (source) 2018-12-16 14:19:03 -0500 received badge ● Popular Question (source) 2016-01-31 14:07:41 -0500 commented answer fractional exponents error: "negative number to a fractional power not real" Thanks, Tmonteil. My problem is exaclty what you wrote in sage lines. I need to plot a potential function of the form V(x) = x^(7/3) corresponding to n = 3 as I pointed before. However, sage plots only for x positive and return negative number to a fractional power not real. In fact, for x = (-1), sage returns V(-1) = 0.500000000000000 + 0.866025403784439*I instead of -1 which is the answer of physical interest. Why sage always chooses the complex root? How do I overcome this issue? 2016-01-31 14:07:41 -0500 answered a question fractional exponents error: "negative number to a fractional power not real" Thanks, Tmonteil. My problem is exaclty what you wrote in sage lines. I need to plot a potential function of the form V(x) = x^(7/3) corresponding to n = 3 as I pointed before. However, sage plots only for x positive and return 'negative number to a fractional power not real'. In fact, for x = (-1), sage returns V(-1) = 0.500000000000000 + 0.866025403784439*I instead of -1 which is the answer of physical interest. Why sage always chooses the complex root? How do I overcome this issue? 2016-01-30 15:55:33 -0500 asked a question fractional exponents error: "negative number to a fractional power not real" Hi. I'm having a problem with fractional exponents and higher order roots in sage. If I put (-2)** (6/2), sqrt((-2)** 6), the result is (-8, 8). That's wrong, since sqrt[ (-2)**6 ] = (-2) * (-2) * (-2) = -8. Does anyone know why this is happening, please? I need to plot a function like V(x) = x^[ (2n+1)/n ], where n is interger. However, sage returns the error 'negative number to a fractional power not real' and plot only the positive branch. 2016-01-30 15:55:33 -0500 asked a question fractional exponent not working correctly. Error: "negative number to a fractional power not real" Hi. I'm having a problem with fractional exponents and higher order roots in sage. If I put (-2)(6/2), sqrt((-2)6), the result is (-8, 8). That's wrong, since sqrt[ (-2)**6 ] = (-1) * (-1) * (-1) = -1. Does anyone know why this is happening, please? I need to plot a function like V(x) = x^[ (2n+1)/n ], where n is interger. However, sage returns the error 'negative number to a fractional power not real' and plot only the positive branch.