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Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：The distribution on periods of the continued fraction of $\sqrt{d}$
$sqrt{d}$ 连续分数 周期
2023/4/18
The continued fraction is a very old and classical object. Its period is closely related to the solubility of the Pell equations, and also to the class group of quadratic fields. Last year, Koymans an...
We show that the coefficients in the Laurent series of the
Igusa local zeta functions I(s) = R
C
f
sω are periods. This is proved by
first showing the existence of functional equation...
Validation of a method for ionospheric electron density reconstruction by means of vertical incidence data during quiet and storm periods
electron density model vertical incidence ionograms ionospheric data ingestion
2015/9/10
A preliminary validation of the technique developed using the NeQuick ionospheric model and the 玡ffective ionization
parameter?Az, based on vertical total electron content data ingestion, was carried...
AROME-WMED,a real-time mesoscale model designed for the HyMeX special observation periods
AROME-WMED real-time mesoscale model designed HyMeX special observation periods
2015/8/6
During autumn 2012 and winter 2013, two special observation periods (SOPs) of the HYdrological cycle in the Mediterranean EXperiment (HyMeX) took place. For the preparatory studies and to support the ...
Influence of Feeding Enzymatically Hydrolyzed Yeast Cell Wall on Growth Performance and Digestive Function of Feedlot Cattle during Periods of Elevated Ambient Temperature
Yeast Growth Performance Digestion Cattle
2016/5/18
In experiment 1, eighty crossbred steers (239±15 kg) were used in a 229-d experiment to evaluate the effects of increasing levels of enzymatically hydrolyzed yeast (EHY) cell wall in diets on growth p...
MONSTER HURRICANES REACHED U.S. NORTHEAST DURING PREHISTORIC PERIODS OF OCEAN WARMING（图）
MONSTER HURRICANES REACHED U.S. NORTHEAST OCEAN WARMING
2015/3/4
Intense hurricanes possibly more powerful than any storms New England has experienced in recorded history frequently pounded the region during the first millennium, from the peak of the Roman Empire i...
Monster hurricanes struck U.S. Northeast during prehistoric periods of ocean warming（图）
Monster hurricanes struck U.S. Northeast prehistoric periods ocean warming
2015/3/4
Intense hurricanes possibly more powerful than any storms New England has experienced in recorded history frequently pounded the region during the first millennium, from the peak of the Roman Empire t...
A GCM Comparison of Plio-Pleistocene Interglacial-Glacial Periods in Relation to Lake El’gygytgyn, NE Arctic Russia
A GCM Comparison of Plio-Pleistocene Interglacial-Glacial Periods Lake El'gygytgyn Arctic Russia
2014/10/21
Until now, the lack of time-continuous, terrestrial paleoenvironmental data from the Pleistocene Arctic has made model simulations of past interglacials difficult to assess. Here, we compare climate s...
The Effects of Rhodobacter capsulatus KCTC-2583 on Cholesterol Metabolism, Egg Production and Quality Parameters during the Late Laying Periods in Hens
Cholesterol Egg Quality Laying Hens Performance Rhodobacter capsulatus KCTC-2583
2016/5/11
An experiment was conducted to investigate the effects of dietary supplementation of Rhodobacter capsulatus KCTC-2583 on egg-yolk and serum cholesterol, egg production and quality parameters during th...
Effect of Dietary Cation-Anion Difference during Prepartum and Postpartum Periods on Performance, Blood and Urine Minerals Status of Holstein Dairy Cow
Dietary Cation-anion Difference Lactation Acid-base Balance Calcium Health Status Dairy Cow
2016/5/9
Twenty four periparturient cows were used to determine the effects of DCAD on acid-base balance, plasma and urine mineral concentrations, health status, and subsequent lactation performance. Each grou...
Minimum periods of homeomorphisms of orientable surfaces
Minimum periods homeomorphisms orientable surfaces Dynamical Systems
2012/4/17
One of the main problems of the theory of dynamical systems is the determination of the existence of periodic orbits of a self-map and more generally, the structure of the set of periods. Define the m...
Nonextensive distributions of rotation periods and diameters of asteroids
asteroids – rotation periods – diameters – nonextensivity
2011/10/21
Context. To investigate the distribution of periods of rotation of asteroids of different regions of the Solar System and distribution of diameters of near-Earth asteroids (NEAs). Aims. Verify if none...
The Factory and The Beehive I. Rotation Periods For Low-Mass Stars in Praesepe
Factory Beehiv Rotation Periods Low-Mass Stars Praesepe
2011/10/12
Stellar rotation periods measured from single-age populations are critical for investigating how stellar angular momentum content evolves over time, how that evolution depends on mass, and how rotatio...
Periods of rational maps modulo primes
p-adic dynamics Mordell-Lang conjecture Algebraic Geometry
2011/9/6
Abstract: Let $K$ be a number field, let $\phi \in K(t)$ be a rational map of degree at least 2, and let $\alpha, \beta \in K$. We show that if $\alpha$ is not in the forward orbit of $\beta$, then th...
On Colmez's product formula for periods of CM-abelian varieties
Fermat curve stable reduction product formula
2011/8/25
Abstract: Colmez conjectured a product formula for periods of abelian varieties with complex multiplication by a field K, analogous to the standard product formula in algebraic number theory. He prove...