7 citations · 13 across the 5 of their papers we have counts for
5 papers
Primitive weird numbers having more than three distinct prime factors
Gianluca Amato, Maximilian F. Hasler, Giuseppe Melfi +1
In this paper we study some structure properties of primitive weird numbers in terms of their factorization. We give sufficient conditions to ensure that a positive integer is weir…
Primitive abundant and weird numbers with many prime factors
Gianluca Amato, Maximilian F. Hasler, Giuseppe Melfi +1
We give an algorithm to enumerate all primitive abundant numbers (briefly, PANs) with a fixed (the number of prime factors counted with their multiplicity), and explicitly find…
LAD Regression and Nonparametric Methods for Detecting Outliers and Leverage Points
Giuseppe Melfi, Susana Faria
The detection of influential observations for the standard least squares regression model is a question that has been extensively studied. LAD regression diagnostics offers alterna…
On certain positive integer sequences
Giuseppe Melfi
A survey of recent results in elementary number theory is presented in this paper. Special attention is given to structure and asymptotic properties of certain families of positive…
On simultaneous binary expansions of and
Giuseppe Melfi
A new family of sequences is proposed. An example of sequence of this family is more accurately studied. This sequence is composed by the integers for which the sum of binary d…