#5453: [with patch, needs review] Create a ring for working with polynomials in
countably infinitely many variables
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 Reporter:  mhansen              |       Owner:  mhansen   
     Type:  enhancement          |      Status:  assigned  
 Priority:  major                |   Milestone:  sage-3.4.1
Component:  commutative algebra  |    Keywords:            
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Comment(by SimonKing):

 I think I will be able to provide an alternative (=sparse) implementation
 soon. I think for {{{stretch}}} and the to-be-implemented permutation
 action, the sparse version is more convenient, while arithmetic might be
 faster in the dense version. However, I can only start the work on
 Wednesday.

 Can you tell me what (coercion?) methods are needed to provide in order to
 have a smooth transition from sparse to dense and from dense to sparse?

 And then I think there should also be a {{{subs}}} method, based on which
 it would be easy to implement a permutation action.

-- 
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/5453#comment:11>
Sage <http://sagemath.org/>
Sage - Open Source Mathematical Software: Building the Car Instead of 
Reinventing the Wheel

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