# Revision history [back]

### Maxima wants to know whether %k1 is positve or negative

I tried to do this in sage:  sage: de=-diff(y,x,2)-G*M/y^2 sage: desolve(de, y, ics=[0,1000])  But sage just says this: TypeError: Computation failed since Maxima requested additional constraints; using the 'assume' command before evaluation may help (example of legal syntax is 'assume(%k1>0)', see assume? for more details) Is %k1 positive or negative?

But when I use assume(%k1>0) I get a syntax error, saying that there's something wrong with the percentage sign.

 2 None slelievre 15579 ●19 ●144 ●307 http://carva.org/samue...

### Maxima wants to know whether %k1 is positve or negative

I tried Trying to do this solve a differential equation in sage: Sage:

 sage:  de=-diff(y,x,2)-G*M/y^2
de = -diff(y, x, 2) - G*M/y^2
sage: desolve(de, y, ics=[0,1000])
ics=[0, 1000])

But sage just says this:

I get a type error and a question:

 TypeError: Computation failed since Maxima requested additional constraints; using the 'assume' command before evaluation may *may* help (example of legal syntax is 'assume(%k1>0)', see assume? assume? for more details)
Is %k1 positive or negative?negative?


But when I use assume(%k1>0) assume(%k1>0) I get a syntax error, error, saying that there's something wrong with the percentage percent sign.

 3 None slelievre 15579 ●19 ●144 ●307 http://carva.org/samue...

### Maxima wants to know whether %k1 is positve or negative

Trying to solve a differential equation in Sage:

sage:  de = -diff(y, x, 2) - G*M/y^2
sage: desolve(de, y, ics=[0, 1000])


I get a type error and a question:

 TypeError: Computation failed since Maxima requested additional constraints; using the 'assume' command before evaluation *may* help (example of legal syntax is 'assume(%k1>0)', see assume? for more details)
Is %k1 positive or negative?


But when I use assume(%k1>0) I get a syntax error, saying that there's something wrong with the percent sign.