Results 141 to 150 of about 41,624 (236)

Sums of divisors of Fibonacci numbers

, 2009
In this note, we prove an estimate on the count of Fibonacci numbers whose sum of divisors in also a Fibonacci number. As a corollary, we find that the series of reciprocals in indices of such Fibonacci numbers is convergent.
Konyagin, Sergei V., Luca, Florian, Stănică, Pantelimon   +2 more
openaire   +1 more source

Harary index of the zero divisor graph of upper triangular matrices. [PDF]

Sci Rep
Alshanqiti O, Sharma S, Bhat VK.
europepmc   +1 more source

Simultaneous spectrophotometric eco-friendly analysis of triple-drug H.pylori regimen (Vonoprazan, Amoxicillin, Metronidazole) for quality control and in vitro dissolution testing. [PDF]

Sci Rep
Hamdy AM, Abu-Bakr RI, El-Hay SSA, Sayed RA.   +3 more
europepmc   +1 more source

Three-torsion subgroups and wild conductor exponents of plane quartics. [PDF]

Res Number Theory
Lupoian E, Rawson J.
europepmc   +1 more source

A novel approach to explore common prime divisor graphs and their degree based topological descriptor. [PDF]

PLoS One
Koam ANA, Haider A, Ahmad A, Ansari MA.
europepmc   +1 more source

Sums of four and more unit fractions and approximate parametrizations. [PDF]

Bull Lond Math Soc, 2021
Elsholtz C, Planitzer S.
europepmc   +1 more source

Theta functions, broken lines and 2-marked log Gromov-Witten invariants. [PDF]

Manuscr Math
Gräfnitz T.
europepmc   +1 more source

Extreme values of derivatives of the Riemann zeta function. [PDF]

Mathematika, 2022
Yang D.
europepmc   +1 more source

On Quantum Ergodicity for Higher Dimensional Cat Maps. [PDF]

Commun Math Phys
Kurlberg P, Ostafe A, Rudnick Z, Shparlinski IE.   +3 more
europepmc   +1 more source

On Hodge polynomials for nonalgebraic complex manifolds. [PDF]

Proc Natl Acad Sci U S A
Katzarkov L, Lee KS, Lupercio E, Meersseman L.   +3 more
europepmc   +1 more source