[Maxima-bugs] [ maxima-Bugs-3034049 ] Elementary Algsys/Solve bug

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Bugs item #3034049, was opened at 2010-07-24 11:41
Message generated for change (Tracker Item Submitted) made by macrakis
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Category: Lisp Core - Solving equations
Group: None
Status: Open
Resolution: None
Priority: 7
Private: No
Submitted By: Stavros Macrakis (macrakis)
Assigned to: Nobody/Anonymous (nobody)
Summary: Elementary Algsys/Solve bug

Initial Comment:
eqs: [y^2+x^2-(400-400/(2/q+1))^2 = 0,(-y-400/(2/q+1)+400)^2+x^2-640000/(2/q+1)^2 = 0]
solve(eqs,[x,y]) gives correct solution, but solve(subst(sqrt(3),q,eqs),[x,y]) yields []!

A possibly related case:
eqt: [y^2+x^2-1,y^2+(1-sqrt(3))*y+x^2+2]
algsys(eqt,[x,y]) => good solutions
solve(eqt,[x,y]) => []


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You can respond by visiting: 
https://sourceforge.net/tracker/?func=detail&atid=104933&aid=3034049&group_id=4933