Sentence:  Three types of SINC <WSD>quadratures</WSD> are surveyed for the evaluation of Cauchy principal value integrals \textstyle\int_\Gamma F(t)dt /(t-x)  , \textstyle x \in \Gamma, where \textstyle\Gamma is an arc in the complex plane. Under suitable assumptions on "F", the <WSD>quadrature</WSD> errors are of order \textstyle O( e^{-c\sqrt{N ) , where "N" is the number of <WSD>quadrature</WSD> nodes and "c" is a constant independent of "N". 
Meaning of the word marked with <WSD> tags:  The calculation of a definite integral by numerical means.