On Oct 11, 10:05 am, "Aaron S. Meurer" <[email protected]> wrote:
> You should be able to force it to display as plain text.  I don't know how 
> you have survived it this long if it does that, actually.  

yeah, but I like the pretty emails I get from family :-) and I don't
like the web interface. But...I now see there is a per-message option
of "view in HTML, shift+alt+H" to view a message. So I have my setting
in plain text again. Thanks.

Regarding what I sent...

solve(eq3.subs(y, yi).as_numer_denom()[0], x)

should be

solve(eq3.subs(y, ys).as_numer_denom()[0], x)


Also, whether there are numbers or not, sympy cannot solve

eq1=1 + 2*y/b - (e + x)**2/a
eq3=1 + 2*y/d - (x - e)**2/c

But if you rearrange it as

eq1=b + 2*y - a*(e + x)**2
eq3=d + 2*y - c*(x - e)**2

it can do so put takes MUCH longer (10X) than the simple approach
above (solve 1 and substitute into 3) and the length of the solution
is much longer than necessary. The 1694 work should fix this, but when
I tried it in 1694, the first set didn't solve, either. The solutions
of the second set are about 3X longer than the "throw away the
denominator" approach given above, too.

/c

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