Opened 8 years ago

Last modified 7 years ago

#14124 new defect

Minor nitpicks on the docstring for Family

Reported by: darij Owned by: sage-combinat
Priority: trivial Milestone: sage-6.4
Component: combinatorics Keywords: sets, family, doc
Cc: Merged in:
Authors: Reviewers:
Report Upstream: N/A Work issues:
Branch: Commit:
Dependencies: Stopgaps:

Status badges


sage: Family?

String Form:    <function Family at 0x92abe64>
Namespace:      Interactive
Loaded File:    /home/darij/sage-5.6/local/lib/python2.7/site-packages/sage/sets/
Source File:    /home/darij/sage-5.6/devel/sage/sage/sets/
Definition:     Family(indices, function=None, hidden_keys=[], hidden_function=None, lazy=False, name=None)
       A Family is an associative container which models a family (f_i)_{i
       in I}. Then, f[i] returns the element of the family indexed by i.
       Whenever available, set and combinatorial class operations
       (counting, iteration, listing) on the family are induced from those
       of the index set.
       There are several available implementations (classes) for different
       usages; Family serves as a factory, and will create instances of
       the appropriate classes depending on its arguments.
       In its simplest form, a list l or a tuple by itself is considered
       as the family (l[i]_{i in I}) where I is the range 0...,len(l).
       So Family(l) returns the corresponding family:

Of course, the range should be 0, ..., len(i)-1.

I'm missing the info that families are immutable. Or are they not? Not exactly understanding the idea of a factory.

Add closing parenthesis in:

       value (ie: "False" for finite data structures and "True" for
       enumerated sets:

Change History (4)

comment:1 Changed 8 years ago by jdemeyer

  • Milestone changed from sage-5.11 to sage-5.12

comment:2 Changed 7 years ago by vbraun_spam

  • Milestone changed from sage-6.1 to sage-6.2

comment:3 Changed 7 years ago by vbraun_spam

  • Milestone changed from sage-6.2 to sage-6.3

comment:4 Changed 7 years ago by vbraun_spam

  • Milestone changed from sage-6.3 to sage-6.4
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