Talk:Linear grammar
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It's pretty clear this article was copied almost verbatim from http://www.cs.umanitoba.ca/~cs303/2005SS/Regular-Grammar-SS.pdf, though the anon author seemed to take steps to make it less readable than in the original. I opted to cut out all but the first paragraph, leaving it to others to either rewrite the part I removed or to decide that it wasn't appropriate to this entry. 128.197.81.229 22:16, 27 January 2006 (UTC)
[edit] Linear and regular grammars
I merged Right_Linear_Grammar into this, but I think that somebody expert and native English speaker (I am not) should draw some precise connections with Regular_grammar. For example, what is the requirement for a linear grammar to have a corresponding a regular grammar? Also, a union of a right-linear grammar and a left-linear grammar can be said to be a linear grammar?
Nb93 14:46, 27 August 2006 (UTC)
Beware of terminology, we make unions of sets, not grammars. The union of the set of all left-linear grammars and the set of all right-linear grammars has no special meaning itself (except it's members only generate regular languages).
On the other hand, the mixture of left and right linear grammars is a (more general) linear grammar.
Languages accepted by left-linear and right-linear grammars are regular languages and the union of these two sets of grammars gives a set of all regular grammars.
The set of regular grammars is thus a subset of the set of linear grammars. And the sets of left-regular (also called left-linear) and right-regular (right-linear) are subsets of the set of regular grammars.
pavlix, 81.0.198.173 (talk) 16:33, 8 June 2008 (UTC)
