[sage-support] Re: change a string to sage expression by sage_eval

2009-08-19 Thread Viny
Hi ! phi, v, u, Cxy are functions of (x,y). I use the command sage_eval (string, locals = { 'E':E, 'u':u, 'v':u, 'phi'=phi, ..}). string it's the expression. It's the only way i found for chang it to expression but it generate an error. Perhaps this come from the function the eval of

[sage-support] Re: change a string to sage expression by sage_eval

2009-08-19 Thread Robert Bradshaw
On Aug 19, 2009, at 12:48 AM, Viny wrote: Hi ! phi, v, u, Cxy are functions of (x,y). I use the command sage_eval (string, locals = { 'E':E, 'u':u, 'v':u, 'phi'=phi, ..}). string it's the expression. It's the only way i found for chang it to expression but it generate an error.

[sage-support] Re: change a string to sage expression by sage_eval

2009-08-19 Thread Viny
I have got the same problem of memory with maxima than Mani Chandra few days ago and I decided to make an interface to mathematica for solving the symbolic linear system which demand too much memory. The expression in my former mail, it's the symbolic answer expression of this linear system with

[sage-support] Re: change a string to sage expression by sage_eval

2009-08-19 Thread Viny
Hi, Thank you, the old idea you gave me to change '[' by ')' and ']' by ')' in the mathematica string is working. I'm trying now to change the limit memory of maxima. On 19 août, 11:10, Viny hje...@hotmail.com wrote: I have got the same problem of memory with maxima than Mani Chandra few

[sage-support] Re: change a string to sage expression by sage_eval

2009-08-19 Thread Viny
Thank you On 19 août, 11:10, Viny hje...@hotmail.com wrote: I have got the same problem of memory with maxima than Mani Chandra few days ago and I decided to make an interface to mathematica for solving the symbolic linear system which demand too much memory. The expression in my former

[sage-support] Re: change a string to sage expression by sage_eval

2009-08-18 Thread Robert Bradshaw
On Aug 17, 2009, at 3:45 AM, Viny wrote: Hello! Is it possible to have the equivalent sage expression of the following string, by using sage_eval() or another function without getting this error in while the transcription : There was talk a while back about x[1] giving a sub-scripted x,