Results 21 to 30 of about 623,839 (308)

THE ALIQUOT CONSTANT [PDF]

open access: yesThe Quarterly Journal of Mathematics, 2010
The average value of log s(n)/n taken over the first N even integers is shown to converge to a constant lambda when N tends to infinity; moreover, the value of this constant is approximated and proven to be less than 0. Here s(n) sums the divisors of n less than n.
Bosma, W, Kane, B
openaire   +5 more sources

Are fundamental constants really constant? [PDF]

open access: yesAmerican Journal of Physics, 1986
Reasons for suspecting that fundamental constants might change with time are reviewed. Possible consequences of such variations are examined. The present status of experimental tests of these ideas is discussed.
openaire   +2 more sources

Ionization constants pKa of cardiolipin. [PDF]

open access: yesPLoS ONE, 2013
Cardiolipin is a phospholipid found in the inner mitochondrial membrane and in bacteria, and it is associated with many physiological functions. Cardiolipin has a dimeric structure consisting of two phosphatidyl residues connected by a glycerol bridge ...
Gerd Olofsson, Emma Sparr
doaj   +1 more source

The expressiveness of spider diagrams augmented with constants [PDF]

open access: yes, 2009
Spider diagrams are a visual language for expressing logical statements or constraints. Several sound and complete spider diagram systems have been developed and it has been shown that they are equivalent in expressive power to monadic first order logic ...
Howse, John   +3 more
core   +1 more source

Universal Constants and Natural Systems of Units in a Spacetime of Arbitrary Dimension

open access: yesUniverse, 2020
We study the properties of fundamental physical constants using the threefold classification of dimensional constants proposed by J.-M. Lévy-Leblond: constants of objects (masses, etc.), constants of phenomena (coupling constants), and “universal ...
Anton Sheykin, Sergey Manida
doaj   +1 more source

Proposal for a constant cosmological constant [PDF]

open access: yesPhysics Letters B, 2000
12 pages, LaTeX, 1 figure; minor rewriting, references corrected, results ...
openaire   +2 more sources

Factor equivalence of Galois modules and regulator constants [PDF]

open access: yes, 2013
We compare two approaches to the study of Galois module structures: on the one hand, factor equivalence, a technique that has been used by Fröhlich and others to investigate the Galois module structure of rings of integers of number fields and of their ...
Bartel, Alex, Alex Bartel
core   +1 more source

Varying constants driven baryogenesis

open access: yesEuropean Physical Journal C: Particles and Fields, 2019
We study the spontaneous baryogenesis scenario in the early universe for three different frameworks of varying constants theories. We replace the constants by dynamical scalar fields playing the role of thermions.
Katarzyna Leszczyńska   +2 more
doaj   +1 more source

Studies of a Tripodal Biomimetic Siderophore Analog: An Efficient Encapsulation for Fe(III) Ion [PDF]

open access: yesIranian Journal of Chemistry & Chemical Engineering, 2020
A new tris-(2-aminoethyl)amine (TREN) capped tripodal Schiff base ligand has been developed by mimicking structural features of a natural siderophore, Bacillibactin, by substituting the catechol units with salicylaldehyde and employing amino acid as a ...
Minati Baral   +2 more
doaj   +1 more source

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