#17662: Evenly distributed sets
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Reporter: vdelecroix | Owner:
Type: enhancement | Status: needs_review
Priority: major | Milestone: sage-6.5
Component: combinatorial | Resolution:
designs | Merged in:
Keywords: | Reviewers:
Authors: Vincent Delecroix | Work issues:
Report Upstream: N/A | Commit:
Branch: public/17662 | d3385807832a91a2a2171aeb9548059a672b5a59
Dependencies: | Stopgaps:
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Comment (by ncohen):
While reviewing this code
{{{
# PYTHON DATA
cdef K # the underlying field
cdef list list_K # the elements of K (i -> x)
cdef dict K_to_int # inverse of list_K (x -> i)
# FLAGS
cdef int count # do we count or do we iterate
cdef int check # do we need to check (debug)
cdef int up_to_isom # do we care only about isomorphisms
# STATIC DATA
cdef unsigned int q # cardinality of the field
cdef unsigned int k # size of the subsets
cdef unsigned int e # k(k-1)/2
cdef unsigned int ** diff # qxq array: diff[x][y] = x - y
cdef unsigned int ** ratio # qxq array: ratio[x][y] = x / y
# DYNAMIC DATA
cdef unsigned int * B # current stack of elements of
{0,...,q-1}
cdef unsigned int * cosets # cosets of differences of elts in B
cdef unsigned int * t # temporary variable for updates
}}}
Thank you for that. This is the kind of code that is a pleasure to read!
`:-PPPPP`
Nathann
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Ticket URL: <http://trac.sagemath.org/ticket/17662#comment:14>
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