48 citations · 51 across the 6 of their papers we have counts for
6 papers
On strong second-order optimality conditions under relaxed constant rank constraint qualification
Ademir Alves Ribeiro, Mael Sachine
We discuss the (first- and second-order) optimality conditions for nonlinear programming under the relaxed constant rank constraint qualification. This condition generalizes the so…
A sequential optimality condition for Mathematical Programs with Cardinality Constraints
Evelin H. M. Krulikovski, Ademir A. Ribeiro, Mael Sachine
In this paper we propose an Approximate Weak stationarity (-stationarity) concept designed to deal with {\em Mathematical Programs with Cardinality Constraints} (MPCaC), and we…
On the weak stationarity conditions for Mathematical Programs with Cardinality Constraints: a unified approach
Evelin H. M. Krulikovski, Ademir A. Ribeiro, Mael Sachine
In this paper, we study a class of optimization problems, called Mathematical Programs with Cardinality Constraints (MPCaC). This kind of problem is generally difficult to deal wit…
Calculus, constrained minimization and Lagrange multipliers: Is the optimal critical point a local minimizer?
Ademir Alves Ribeiro, Jose Renato Ramos Barbosa
In this short note, we discuss how the optimality conditions for the problem of minimizing a multivariate function subject to equality constraints have been dealt with in undergrad…
The Complexity of Primal-Dual Fixed Point Methods for Ridge Regression
Ademir Alves Riberio, Peter Richtárik
We study the ridge regression (L2 regularized least squares) problem and its dual, which is also a ridge regression problem. We observe that the optimality conditions describing th…
Characterization of river flow fluctuations via horizontal visibility graphs
A. C. Braga, L. G. A. Alves, L. S. Costa +4
We report on a large-scale characterization of river discharges by employing the network framework of the horizontal visibility graph. By mapping daily time series from 141 differe…