Results 31 to 40 of about 7,498,234 (288)

Average value of the divisor class numbers of real cubic function fields

open access: yesOpen Mathematics, 2023
We compute an asymptotic formula for the divisor class numbers of real cubic function fields Km=k(m3){K}_{m}=k\left(\sqrt[3]{m}), where Fq{{\mathbb{F}}}_{q} is a finite field with qq elements, q≡1(mod3)q\equiv 1\hspace{0.3em}\left(\mathrm{mod}\hspace{0 ...
Lee Yoonjin, Lee Jungyun, Yoo Jinjoo
doaj   +1 more source

Data-Limited Stock Assessment for Fish Species Devoid of Catch Statistics: Case Studies for Pampus argenteus and Setipinna taty in the Bohai and Yellow Seas

open access: yesFrontiers in Marine Science, 2021
For many fish stocks, such as Pampus argenteus and Setipinna taty in China, size composition data are more accessible than catch data. Varied results can arise when different length-based stock assessment models are applied to these data, and fishery ...
Qingpeng Han   +12 more
doaj   +1 more source

Hypergeometric Functions for Function Fields

open access: yesFinite Fields and Their Applications, 1995
Let \(\{a,b,c\}\) be complex constants. Then the famous Gauss hypergeometric equation is given by \[ z(1 - z) {d^2y \over dz^2} + \bigl( c - (a + b + 1) z \bigr) {dy \over dz} - aby = 0. \] One defines the Pochhammer symbol \((a)_n\) by \((a)_0 : = 1\) and for \(n > 1\), \((a)_n : = a(a + 1) (a + 2) (a + 3) \cdots (a + n - 1)\).
openaire   +1 more source

The luminosity function of field galaxies

open access: yes, 2011
Schmidt's method for construction of luminosity function of galaxies is generalized by taking into account the dependence of density of galaxies from the distance in the near Universe.
A Dressler   +54 more
core   +1 more source

A Naturally Large Four-Point Function in Single Field Inflation [PDF]

open access: yes, 2010
Non-Gaussianities of the primordial density perturbations have emerged as a very powerful possible signal to test the dynamics that drove the period of inflation. While in general the most sensitive observable is the three-point function in this paper we
  +16 more
core   +1 more source

Synergistic ecotoxicity of nanoscale zero-valent iron and cadmium in soil: Insights from Eisenia fetida

open access: yesEcotoxicology and Environmental Safety
Nano-zero-valent iron (nZVI) has been extensively applied as a soil conditioner in remediation practices. However, studies have suggested that excessive doses of nZVI can adversely affect soil organisms and even exacerbate the toxicity of contaminants ...
Luo Qingrui   +6 more
doaj   +1 more source

Attraction between like-poles of two magnets mediated by a soft ferromagnetic material [PDF]

open access: yesRevista Brasileira de Ensino de Física
We present an engaging educational demonstration designed to captivate students’ attention. The experiment reveals an intriguing phenomenon – a surprising attraction between two magnets with identical poles facing each other when a steel metal sphere is ...
Tarcísio N. Teles   +2 more
doaj   +1 more source

Vacuum decay in quantum field theory [PDF]

open access: yes, 2001
We study the contribution to vacuum decay in field theory due to the interaction between the long and short-wavelength modes of the field. The field model considered consists of a scalar field of mass $M$ with a cubic term in the potential.
Esteban Calzetta   +132 more
core   +8 more sources

Influence of biochar on the remediation of cadmium-contaminated soil in an Eisenia fetida–Solanum nigrum system

open access: yesEnvironmental Chemistry and Ecotoxicology
Biochar, plants, and earthworms have good remediation effects on cadmium (Cd)-contaminated soils. However, few studies have combined all three technologies to explore the treatment of Cd-contaminated soils.
QingRui Luo   +6 more
doaj   +1 more source

Coarse-grained field wave function in stochastic inflation

open access: yes, 2000
The wave function for the matter field fluctuations in the infrared sector is studied within the framework of inflationary cosmology. These fluctuations are described by a coarse-grained field which takes into account only the modes with wavelength much ...
Bellini   +26 more
core   +1 more source

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