[R] Roots of quadratic system.

[John Janmaat]

Kjetil Brinchmann Halvorsen wrote:
> John Janmaat wrote:
> 
>> Hello,
>>
>> I have a system of quadratic equations (results of a Hamiltonian 
>> optimization)
>> which I need to find the roots for.  Is there a package and/or 
>> function which
>> will find the roots for a quadratic system?
> 
> Certainly you cxould use solve, see
> ?solve
> Alternatively you could go for a computer algebra system with an 
> implemantation
> of groebner basis, and use an symbolic method.

I have looked into using solve.  However, solve works on a system of 
linear equations (at least that is how I read it).  I have a system of 
quadratic equations.  They can be written to equate to zero, so that a 
non-linear system solver should do the trick.

John.

> Kjetil
> 
>> Note that I am not opimizing, but
>> rather solving the first order conditions which come from a 
>> Hamiltonian.  I am
>> basically looking for something in R that will do the same thing as 
>> fsolve in
>> Matlab.
>>
>> Thanks,
>>
>> John.
>>
>> ==============================================
>> Dr. John Janmaat
>> Department of Economics
>> Acadia University
>> Tel: 902-585-1461
>>
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>>
>>  
>>
> 
> 


-- 
==========================================
Dr. John Janmaat
Department of Economics
Acadia University
Wolfville, Nova Scotia, Canada.