# Talk:Chebyshev–Markov–Stieltjes inequalities

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## ${\displaystyle \xi _{i}}$ as zeros?

${\displaystyle \xi _{i}}$ are the zeros of the polynomials ${\displaystyle P_{(}i-1)}$?

## Clarify role of ${\displaystyle c_{2m-1}}$

The ${\displaystyle c_{i}}$'s are only given for ${\displaystyle i=1,...2m-2}$, but the moments of ${\displaystyle \mu }$ are supposed to match all the way up to index ${\displaystyle i=2m-1}$. Am I correct that ${\displaystyle c_{2m-1}}$ is an arbitrary parameter which can be varied to give different ${\displaystyle P_{m}}$'s, and hence different ${\displaystyle \xi }$'s and so give tight bounds on all or almost all half-lines? Initial reading of the theorem, I had the impression that you only get information on the ${\displaystyle m}$ half-lines that come from the roots of ${\displaystyle P_{m}}$; but since ${\displaystyle P_{m}}$ is not uniquely determined by ${\displaystyle c_{1},...c_{2m-2}}$ it seems the theorem is more powerful than was immediately apparent. Am I mistaken, or is the statement that ${\displaystyle \xi _{1},...\xi _{m}}$ are determined by ${\displaystyle c_{0},...c_{2m-2}}$ false, and that we in fact need ${\displaystyle c_{2m-1}}$ to determine the ${\displaystyle \xi }$'s? Perhaps the role of ${\displaystyle c_{2m-1}}$,etc... could be clarified in the article. I don't have any book that covers this theorem so I don't feel qualified to edit the article.98.109.176.168 (talk) 05:08, 10 February 2010 (UTC)

I am sorry, I only saw this now. Is the problem fixed in the current version? Sasha (talk) 20:44, 12 December 2011 (UTC)

## Polynomial normalization

The article doesn't mention how the orthogonal polynomials are to be normalized - should the polynomials be orthonormal? Please include this information in the article. Obsolesced (talk) 10:05, 2 February 2017 (UTC)