Talk:Indexed family
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[edit] Notation
There seems to be a mistake in the Notation section in the article. It appears to me that it purports to write two notations, a usual and a misleading one, but both notations look the same to me. -- Jitse Niesen 04:14, 15 Jun 2005 (UTC)
Both notations are common, the first uses round parentheses () and the second uses curly parentheses {}. Curly parentheses are also used for sets, which can be confusing. Markus Schmaus 09:15, 15 Jun 2005 (UTC)
I see, thanks. I took the liberty of pointing this out explicitly in the article. -- Jitse Niesen 10:25, 15 Jun 2005 (UTC)
You can't use the notion of family to define ordered n-tuple, since an ordered n-tuple (a triple) is used to define family.--Baterista 16:01, 11 November 2005 (UTC)
The concept of multiset comes in handy between family and set. Family → multiset → set. The examples on linear dependence shows the difference between multiset and set, rather than between family and set. Bo Jacoby 11:00, 22 February 2006 (UTC)
[edit] Definition
JA: The lead of the article begins with an informal definition, but not one so casual that it would be refused service at your average fast food restaurant, and so it contains the word "usually" as a sop to diners from computer science who commonly adapt the idea of an indexed set to their notion of a "union datatype". But that's no reason to sell them the store and get out of the business, if you catch my drift. Jon Awbrey 12:02, 7 June 2006 (UTC)
