DiegoQuantico's profile - activity

overview network karma followed questions activity

2020-04-26 03:09:33 +0200	received badge	● Student (source)
2019-03-22 02:25:13 +0200	received badge	● Popular Question (source)
2018-12-16 21:19:03 +0200	received badge	● Popular Question (source)
2018-12-16 21:19:03 +0200	received badge	● Notable Question (source)
2018-12-16 21:19:03 +0200	received badge	● Famous Question (source)
2016-01-31 21:07:41 +0200	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 21:07:41 +0200	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 22:55:33 +0200	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 22:55:33 +0200	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.