3 papers
math.NA2022
Fast multiplication, determinants, and inverses of arrowhead and diagonal-plus-rank-one matrices over associative fields
Nevena Jakovcevic Stor, Ivan Slapnicar
The article considers arrowhead and diagonal-plus-rank-one matrices in F^(nxn) where F in R,C or H. H is a non-commutative field of quaternions. We give unified formulas for fast m…
q-bio.PE2020
Universal evolutionary model for periodical species
Eric Goles, Ivan Slapničar, Marco A. Lardies
Real-world examples of periods of periodical organisms range from cicadas whose life-cycles are larger prime numbers, like 13 or 17, to bamboos whose periods are large multiples of…
math.GM2017
There are no cycles in the sequence
Ivan Slapnicar
In 1937, Lothar Collatz conjectured that the sequence generated by the rule for odd, for even, starting in any positive int…