Erratum to “The extremal codes of length 42 with automorphism of order 7” [Discrete Math. 190 (1998) 201–213]

This note corrects a mistake in the previous paper where some of the codes are missing and others are repeated. All [42, 21, 8] binary self-dual with an automorphism of order 7 are enumerated. Up to equivalence their number is 29.     

Corrigendum to “Informational requirements of social choice rules” [Math. Social Sci. 57 (2009) 188-198]

I correct the statements of Theorems 3.1 and 3.2 and the proof of Theorem 3.1 in Sato (Informational requirements of social choice rules, Mathematical Social Sciences 57 (2009) 188-198). I add a condition requiring that each rule in the theorems does not choose the entire set of the alternatives when all agents have the same preference relation.     

Erratum to “A new branch and bound method with pretreatment for the binary quadratic programming” [Appl. Math. Comput. 192 (2007) 252-259]

We present in this note, an Erratum in “A new branch and bound method with pretreatment for the binary quadratic programming” by Xuewen Mu et al.     

Corrigendum to “Orbit closures in the enhanced nilpotent cone” [Adv. Math. 219 (1) (2008) 27–62]

In this note, we point out an error in the proof of Theorem 4.7 of [P.N. Achar, A. Henderson, Orbit closures in the enhanced nilpotent cone, Adv. Math. 219 (1) (2008) 27–62], a statement about the existence of affine pavings for fibres of a certain resolution of singularities of an enhanced nilpotent orbit closure. We also give independent proofs of later results that depend on that statement, so all other results of that paper remain valid.     

Erratum to “Dynamical complexities in the Leslie-Gower predator-prey model as consequences of the Allee effect on prey” [Appl. Math. Modell. (2011) 366-381]

The aim of this paper is to correct two mistakes in [Appl. Math. Modell. (2011) 366-381], which are: the function defining the time rescaling given and the inclusion of a parameter outside of model.For a modified Leslie-Gower type predator-prey model considering the Allee effect on prey, a change of variables and a new time rescaling generating a diffeomorphism is proved; a topologically equivalent system to the original one is obtained, which is the same studied in the mentioned paper; we claim that the results and conclusions obtained are correct and the errors have not further implications.