Ioannis C. Demetriou

13 papers Journal 11Unranked 2
YearRankTypeTitle / Venue / Authors
2024 J jnl
Least squares monotonic unimodal approximations to successively updated data and an application to a Covid-19 outbreak.
Optim. Methods Softw.
Ioannis C. Demetriou
2022 J jnl
A binary search algorithm for univariate data approximation and estimation of extrema by piecewise monotonic constraints.
J. Glob. Optim.
Ioannis C. Demetriou
2022 J jnl
Convex-Concave fitting to successively updated data and its application to covid-19 analysis.
J. Comb. Optim.
Demetrius E. Davos, Ioannis C. Demetriou
2020 J jnl
Separation theorems for the extrema of best piecewise monotonic approximations to successive data.
Optim. Methods Softw.
Ioannis C. Demetriou
2010 J jnl
A linearly distributed lag estimator with r-convex coefficients.
Comput. Stat. Data Anal.
E. E. Vassiliou, Ioannis C. Demetriou
2007 J jnl
Algorithm 863: L2WPMA, a Fortran 77 package for weighted least-squares piecewise monotonic data approximation.
ACM Trans. Math. Softw.
Ioannis C. Demetriou
2007 — conf
Necessary and Sufficient Conditions for Best L1 Estimates of Ordinates of Convex Functions.
World Congress on Engineering
S. S. Papakonstantinou, Ioannis C. Demetriou
2007 — conf
The Karush-Kuhn-Tucker Test of Convexity of Univariate Observations and Certain Economic Applications.
World Congress on Engineering
Sofia A. Georgiadou, Ioannis C. Demetriou
2006 J jnl
L2CXCV: A Fortran 77 package for least squares convex/concave data smoothing.
Comput. Phys. Commun.
Ioannis C. Demetriou
2005 J jnl
An adaptive algorithm for least squares piecewise monotonic data fitting.
Comput. Stat. Data Anal.
E. E. Vassiliou, Ioannis C. Demetriou
2004 J jnl
Least Squares Convex-Concave Data Smoothing.
Comput. Optim. Appl.
Ioannis C. Demetriou
2003 J jnl
Adaptive Preconditioned Variational Methods for Solving Self-Adjoint Partial Differential Equations.
Int. J. Comput. Math.
Ioannis C. Demetriou, David J. Evans
1995 J jnl
Algorithm 742: L2CXFT: A Fortran Subroutine for Least Squares Data Fitting with Nonnegative Second Divided Differences.
ACM Trans. Math. Softw.
Ioannis C. Demetriou