### Table of Contents

#### Articles

Improved upper bounds for odd multiperfect numbers | |

Y.-G. Chen, C.-E. Tang |

Congruences modulo powers of 2 for Fu's 5 dots bracelet partitions | |

E. X. W. Xia, O. X. M. Yao |

Primitive subgroups and PST-groups | |

A. Ballester-Bolinches, J. C. Beidleman, R. Esteban-Romeo |

Wiener index of trees of given order and diameter at most 6 | |

S. Mukwembi, T. Vetrik |

Directional maximal operators and radial weights on the plane | |

H. Saito, H. Tanaka |

Special maximal subgroups of \(p\)-groups | |

J. Cossey |

Constructing permutation polynomials over finite fields | |

X. Qin, S. Hong |

Counting symmetric bracelets | |

Y. Zelenyuk, Y. Zelenyuk |

Variations on a theorem of Davenport concerning abundant numbers | |

E. Jennings, P. Pollack, L. Thompson |

Incidence semirings of graphs and visible bases | |

J. Abawajy, A. V. Kelarev, M. Miller, J. Ryan |

Unique representation bi-basis for the integers | |

R. Xiong, M. Tang |

Symmetric algebras over rings and fields | |

T. C. Craven, T. L. Smith |

Arithmetic properties of 1--shell totally symmetric plane partitions | |

M. D. Hirschhorn, J. A. Sellers |

Locally finite groups whose subgroups have finite normal oscillation | |

F. de Giovanni, M. Martusciello, C. Rainone |

Backward 3-step extensions of recursively generated weighted shifts: a range of quadratic hyponormality | |

G. R. Exner, I. B. Jung, M. R. Lee, S. H. Park |

On a question of J.M. Rassias | |

W. Fechner |

A note on the Polignac numbers | |

H. Pan |

Finite higher commutators in associative rings | |

C. Lanski |

A note on spaces with a strong rank 1-diagonal | |

W.-F. Xuan, W.-X. Shi |

Some new characterisations of finite \(p\)-supersolvable groups | |

C. Li, N. Yang, N. Tang |

Corrigendum to 'Conjugacy class size conditions which imply solvability' | |

Q. Kong, Q. Liu |

Correction to `On the positivity of Riemann-Stieltjes integrals' | |

J. Lukkarinen, M. S. Pakkanen |

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Bulletin of the Aust. Math. Soc., copyright Australian Mathematical Publishing Association Inc.