Corrigendum to “Property (gb) and perturbations” [J. Math. Anal. Appl. 383 (1) (2011) 82–94]

We give a complete reference for work cited in [M.H.M. Rashid, Property (gb) and perturbations, J. Math. Anal. Appl. 383 (1) (2011) 82–94].     

Erratum to “Single-machine scheduling problems with both deteriorating jobs and learning effects” [Appl. Math. Modell. 34 (2010) 2831–2839]

The aim of this paper is to show by counterexamples that Theorems 3–10 and Corollaries 2–5 in Wang et al. [Appl. Math. Model. 34 (2010) 2831–2839] are incorrect.     

Corrigendum to “The envelope theorem for multiobjective convex programming via contingent derivatives” [J. Math. Anal. Appl. 372 (1) (2010) 197–207]

The aim of this note is to formulate an envelope theorem for vector convex programs. This version corrects an earlier work, “The envelope theorem for multiobjective convex programming via contingent derivatives” by Jiménez Guerra et al. (2010) [3]. We first propose a necessary and sufficient condition allowing to restate the main result proved in the alluded paper. Second, we introduce a new Lagrange multiplier in order to obtain an envelope theorem avoiding the aforementioned error.     

Erratum to “Single machine past-sequence-dependent setup times scheduling with general position-dependent and time-dependent learning effects” [Appl. Math. Modell. 35 (2011) 1388–1395]

The aim of this paper is to show by a counterexample that Theorem 7 and Corollary 8 in Wang and Li [Appl. Math. Modell. 35 (2011) 1388–1395.] are incorrect.     

Comments on “The stability and control of fractional nonlinear system with distributed time delay” [Appl. Math. Model. 40 (2016) 3257–3263]

In this comment, we give four counterexamples to show that Conclusion 1, Conclusion 2, Theorem 1 and Theorem 2 of a recent paper [1] are incorrect.