Pentti Haukkanen

According to our database, Pentti Haukkanen authored at least 18 papers between 1995 and 2020.

Collaborative distances:

• Dijkstra number of five.
• Erdős number of five.

2020

Studying the inertias of LCM matrices and revisiting the Bourque-Ligh conjecture.

Pentti Haukkanen, Mika Mattila, Jori Mäntysalo

J. Comb. Theory, Ser. A, 2020

2019

Arithmetic Subderivatives: Discontinuity and Continuity.

Pentti Haukkanen, Jorma K. Merikoski, Timo Tossavainen

J. Integer Seq., 2019

2017

The Arithmetic Jacobian Matrix and Determinant.

Pentti Haukkanen, Jorma K. Merikoski, Mika Mattila, Timo Tossavainen

J. Integer Seq., 2017

2016

On Arithmetic Partial Differential Equations.

Pentti Haukkanen, Jorma K. Merikoski, Timo Tossavainen

J. Integer Seq., 2016

2015

Studying the singularity of LCM-type matrices via semilattice structures and their Möbius functions.

Pentti Haukkanen, Mika Mattila, Jori Mäntysalo

J. Comb. Theory, Ser. A, 2015

2014

On the positive definiteness and eigenvalues of meet and join matrices.

Mika Mattila, Pentti Haukkanen

Discret. Math., 2014

2013

Perpendicularity in an Abelian Group.

Pentti Haukkanen, Mika Mattila, Jorma K. Merikoski, Timo Tossavainen

Int. J. Math. Math. Sci., 2013

Asymptotics of the number of threshold functions on a two-dimensional rectangular grid.

Pentti Haukkanen, Jorma K. Merikoski

Discret. Appl. Math., 2013

2012

Discrete Ramanujan-Fourier Transform of Even Functions (mod $r$)

Pentti Haukkanen

CoRR, 2012

Some formulas for numbers of line segments and lines in a rectangular grid.

Pentti Haukkanen, Jorma K. Merikoski

Ars Comb., 2012

2011

Asymptotics for numbers of line segments and lines in a square grid

Pentti Haukkanen, Jorma K. Merikoski

CoRR, 2011

A generalization of Descartes' rule of signs and fundamental theorem of algebra.

Pentti Haukkanen, Timo Tossavainen

Appl. Math. Comput., 2011

2010

On The Generalized Lucas Sequences by Hessenberg Matrices.

Emrah Kiliç, Dursun Tasci, Pentti Haukkanen

Ars Comb., 2010

2007

On Direct and Inverse Proportionality.

Markku Halmetoja, Pentti Haukkanen, Teuvo Laurinolli, Jorma K. Merikoski, Timo Tossavainen, Ari Virtanen

Am. Math. Mon., 2007

Determinant and Inverse of Meet and Join Matrices.

Ercan Altinisik, Naim Tuglu, Pentti Haukkanen

Int. J. Math. Math. Sci., 2007

2005

Notes on the divisibility of GCD and LCM Matrices.

Pentti Haukkanen, Ismo Korkee

Int. J. Math. Math. Sci., 2005

2000

On a generalized convolution of incidence functions.

Pentti Haukkanen

Discret. Math., 2000

1995

An abstract Möbius inversion formula with number-theoretic applications.

Pentti Haukkanen

Discret. Math., 1995