Daniel Espinoza

A Study of Domino-Parity and k-Parity Constraints for the TSP (2008)

William Cook, Daniel Espinoza, Marcos Goycoolea

Abstract. Letchford (2000) introduced the domino-parity inequalities for the symmetric traveling salesman problem and showed that if the support graph of an LP solution is planar, then the separation...

Generalized domino-parity inequalities for the TSP (2008)

William J. Cook, Daniel Espinoza, Marcos Goycoolea

We extend the work of Letchford (2000) by introducing a new class of valid inequalities for the traveling salesman problem, called the generalized domino-parity (GDP) constraints. Just as...

Implementing Domino-Parity Inequalities for the Traveling Salesman Problem (2005)

William Cook, Daniel Espinoza, Marcos Goycoolea

We describe an implementation of Letchford’s domino-parity inequalities for the (symmetric) traveling salesman problem. The implementation includes pruning methods to restrict the search for...

Comparative Efficacies of Rifaximin and Vancomycin for Treatment of Clostridium difficile-Associated Diarrhea and Prevention of Disease Recurrence in Hamsters▿

Kokkotou, Efi, Moss, Alan C., Michos, Athanasios, Espinoza, Daniel, Cloud, Jeffrey W., Mustafa, Nasima, ...

Clostridium difficile-associated colitis is an increasing cause of morbidity and mortality in hospitalized patients, with high relapse rates following conventional therapy. We sought to determine the...