Re: [Maxima-discuss] Why does 'solve' not work here?

[Mark <zei...@ya...>]

> On 02/13/2014 01:04 AM, Mark wrote:
>> (%i9) to_poly_solve([sin(x-y)-sin(y)=0,sin(y)=0],[x,y]);
>> Unable to solve
>> (%o9) %solve([sin(y) = 0,-sin(y-x)-sin(y) = 0],[x,y])


On 02/13/2014 06:10 AM, Richard Fateman wrote:
> You have not provided a system of polynomial equations.
> You are free to write a new program, say SuperSolve( ....)   that does more work

On 02/13/2014 02:14 AM, Barton Willis wrote:
> The limitation is purely the time and effort required for volunteers to improve the equation solving ability of Maxima.

I'm sorry but I somehow seem to miss your points. So please let me
reformulate my questions. Given the two simultaneous equations:
sin(y) = 0
sin(x-y) = sin(y)
will Maxima solve them using a single input command, calling just a
single one of its built in functions?
If so, which built in function?

We know that these two absolutely trivial eqns. can be solved in several
'automatic' ways - apart from just reading off their solution anyway -
eg. by i) employing sin()'s periodicity to restrict x and y, ii)
arcsin()-ing both eqns., iii) solving the resulting set of linear eqns.
using Gauss-Seidel
Because of that it is clear that in principle one can go and apply
i)-iii) step-by-step using Maxima. But that's not what I'm looking for.

M