Talk:Control-Lyapunov function

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This article is within the field of Control theory.

or ?[edit]

At the start of the article, is function of the single variable . And at the end is dependent of also. I think that the article should be changed to avoid this. To solve it I suppose that first equation can be changed to read:

Positive definiteness of [edit]

It should be made clear if positive definiteness of is withs respect to or both and . I would say for the explanation that is only for , but I feel that something is missing in the explanation. —Preceding unsigned comment added by (talk) 01:56, 20 May 2010 (UTC)