sentences:  Chebyshev–Markov–Stieltjes inequalities
  
  In mathematical analysis, the Chebyshev–Markov–Stieltjes inequalities are inequalities related to the problem of moments that were formulated in the 1880s by Pafnuty Chebyshev and proved independently by Andrey Markov and (somewhat later) by Thomas Jan Stieltjes.Informally, they provide sharp bounds on a measure from above and from below in terms of its first moments.