The SIAM Journal on Numerical Analysis (SINUM) contains research articles on the latest development and analysis of numerical methods. Learn more about SINUM and how to submit to it, become an editor, or purchase the journal. IMA Journal of Numerical Analysis Volume 2, Number 2, April, J. A. Gregory and R. Delbourgo Piecewise rational quadratic interpolation to monotonic data. Oxford University Press is a department of the University of Oxford. It furthers the University's objective of excellence in research, scholarship, and education by publishing worldwide.