Results 311 to 320 of about 13,456,150 (364)
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Algorithmica, 2005
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Oded Lachish, Ilan Newman
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zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Oded Lachish, Ilan Newman
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Phytoplankton response to polystyrene microplastics: Perspective from an entire growth period.
Chemosphere, 2018Microplastics are widely identified in aquatic environments, but their impacts on phytoplankton have not been extensively studied. Here, the responses of Chlorella pyrenoidosa under polystyrene (PS) microplastics exposure were studied across its whole ...
Yufeng Mao +9 more
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On Periodic Solutions of the Periodic
Results in Mathematics, 1988By treating the periodic Riccati equation $${\rm\dot{z}=a(t)z^2+b(t)z+c(t)}$$ as a dynamical system on the sphere S, the number and stability of its periodic solutions are determined. Using properties of Moebius transformations, an exact algebraic relation is obtained between any periodic solution and any complex-valued periodic solution.
K. Y. Guan, J. Gunson, H. S. Hassan
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Geological Society Special Publication, 2019
Summary Twelve rocks for which calculated isotopic ages are mutually consistent and for which there is some biostratigraphic control have been used in the construction of a Permian time-scale.
Denys B. Smith
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Summary Twelve rocks for which calculated isotopic ages are mutually consistent and for which there is some biostratigraphic control have been used in the construction of a Permian time-scale.
Denys B. Smith
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On the periods of a periodic function
International Journal of Mathematical Education in Science and Technology, 2005It is known that any nonconstant real-valued periodic function defined on the set of all real numbers is either discontinuous at each point of its domain or has a least positive period. Using the additive semigroup consisting of non-negative periods, we generalize this result by giving a unified proof of the same conclusion when the domain of the given
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Periodic-like words, periodicity, and boxes
Acta Informatica, 2001zbMATH Open Web Interface contents unavailable due to conflicting licenses.
CARPI, Arturo, de Luca A.
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On the Periods of Periodic Motions in Autonomous Systems
Ukrainian Mathematical Journal, 2001Here, the author establishes lower bounds on the periods of periodic solutions to the autonomous system \(\dot x=f(x)\) determined in a partially ordered Banach space \( \langle X,\|\cdot\|,\preceq\rangle\). It is assumed that the mapping \(f:X\mapsto X\) satisfies the condition \({\mathbf m}(f(x_1)-f(x_2))\preceq_E L{\mathbf m}(x_1-x_2)\) for all ...
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1987
The period of production is, or purports to be, a measure of aggregate capital per head. More specifically, it is a theoretical concept which tries to measure an economy’s (heterogeneous) capital stock per head in (homogeneous) units of time.
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The period of production is, or purports to be, a measure of aggregate capital per head. More specifically, it is a theoretical concept which tries to measure an economy’s (heterogeneous) capital stock per head in (homogeneous) units of time.
openaire +1 more source