Results 61 to 70 of about 553,460 (132)

The Romantic Discovery of Radiolaria in the Ocean

Journal of Eukaryotic Microbiology, Volume 73, Issue 1, January/February 2026.
ABSTRACT Radiolaria are unicellular marine organisms (protists) that have been drifting in oceanic plankton for hundreds of millions of years. These mineral architects can build extraordinarily complex skeletons, which fascinated and puzzled naturalists observing water samples through rudimentary microscopes.
Johan Decelle
wiley   +1 more source

A Brief Study on the k-Dimensional Repunit Sequence

Axioms
In this paper, we aim to introduce and investigate the bidimensional, tridimensional and k-dimensional extension of Repunit numbers, with a particular focus on their recurrence relations, key properties, and various sum identities.
Eudes A. Costa, Paula M. M. C. Catarino, Paulo J. M. Vasco, Francisco R. V. Alves   +3 more
doaj   +1 more source

A new member of the Pell sequences: The pseudo-Pell sequence

In this study, we define a new family of the Pell numbers and establish some properties of the relation to the ordinary Pell numbers. We give some identities the pseudo-Pell numbers.
GÖKBAŞ, Hasan
core   +1 more source

On the Mersenne sequence [PDF]

, 2016
From Binet’s formula of Mersenne sequence we get some properties for this sequence. Mersenne, Jacobsthal and Jacobsthal-Lucas sequences are considered in order to achieve some relations between them, sums and certain products involving terms of these ...
Campos, Helena, Vasco, Paulo, Catarino, Paula   +2 more
core   +1 more source

On Gersenne Sequence: A Study of One Family in the Horadam-Type Sequence

Axioms
This study introduces an innovative approach to Mersenne-type numbers. This paper introduces a new class of numbers, which we call Gersenne numbers. The aim of this paper is to define the Gersenne sequence and to investigate some of their properties ...
Douglas Catulio Santos, Eudes Antonio Costa, Paula M. M. C. Catarino   +2 more
doaj   +1 more source

Almost Forgotten Research Contexts: William Stern's Giftedness Research. [PDF]

J Intell, 2023
Heinemann R.
europepmc   +1 more source

On a unified approach to homogeneous second-order linear difference equations with constant coefficients and some applications

Special Matrices
In this article, we establish a new closed formula for the solution of homogeneous second-order linear difference equations with constant coefficients by using matrix theory.
Kaddoura Issam, Mourad Bassam
doaj   +1 more source

William Stern: The Relevance of His Program of 'Differential Psychology' for Contemporary Intelligence Measurement and Research. [PDF]

J Intell, 2023
Kovacs K, Pléh C.
europepmc   +1 more source

Stieltjes constants of L-functions in the extended Selberg class. [PDF]

Ramanujan J, 2021
Inoue S, Eddin SS, Suriajaya AI.
europepmc   +1 more source

Padovan numbers which are palindromic concatenations of two distinct repdigits. [PDF]

Rev R Acad Cienc Exactas Fis Nat A Mat, 2021
Chalebgwa TP, Ddamulira M.
europepmc   +1 more source