#6630: The empty species exists !!!
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Reporter: hivert | Owner: hivert
Type: defect | Status: assigned
Priority: major | Milestone: sage-4.1.1
Component: combinatorics | Keywords: species zero
Reviewer: | Author:
Merged: |
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Changes (by hivert):
* status: new => assigned
Comment:
The attached patch should solve the problem. I didn't address the question
of making the empty species an actual neutral and zero element with
respect to the sum and the product of the semi-ring of species. This means
that if you add the empty species with another species you get a different
species (an instance of the class {{{SumSpecies_class}}}), and the same
with the product. This should be solved in a patch which actually create
the semi-ring of species...
Florent
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Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/6630#comment:1>
Sage <http://sagemath.org/>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
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