Results 31 to 40 of about 3,566,207 (291)
Hadamard-Type Fractional Heat Equations and Ultra-Slow Diffusions
Fractal and Fractional, 2021 In this paper, we study diffusion equations involving Hadamard-type time-fractional derivatives related to ultra-slow random models. We start our analysis using the abstract fractional Cauchy problem, replacing the classical time derivative with the ...
Alessandro De Gregorio, Roberto Garra
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A porewater-based stable isotope approach for the investigation of subsurface hydrological processes [PDF]
Hydrology and Earth System Sciences, 2012 Predicting and understanding subsurface flowpaths is still a crucial issue in hydrological research. We present an experimental approach to reveal present and past subsurface flowpaths of water in the unsaturated and saturated zone.
J. Garvelmann, C. Külls, M. Weiler
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Schramm-Loewner Equations Driven by Symmetric Stable Processes [PDF]
, 2007 We consider shape, size and regularity of the hulls of the chordal Schramm-Loewner evolution driven by a symmetric alpha-stable process. We obtain derivative estimates, show that the complements of the hulls are Hoelder domains, prove that the hulls have
C. Pommerenke +14 more
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On the reducibility of affine models with dependent Lévy factors
Modern Stochastics: Theory and ApplicationsThe paper is devoted to the study of the short rate equation of the form \[ \text{d}R(t)=F(R(t))\text{d}t+{\sum \limits_{i=1}^{d}}{G_{i}}(R(t-))\text{d}{Z_{i}}(t),\hspace{1em}R(0)={R_{0}}\ge 0,\hspace{3.33333pt}t\gt 0,\] with deterministic functions
Michał Barski, Rafał Łochowski
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Portafolios α-estables del G20: Evidencia empírica con Markowitz, Tobin y CAPM
Revista Mexicana de Economía y Finanzas Nueva Época REMEF, 2021 G20 α-stable portfolios: Empirical evidence with Markowitz, Tobin and CAPM Objective: This research extends Markowitz, Tobin, and CAPM optimal portafolio with α-stable processes.
José Antonio Climent Hernández +2 more
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Some Theorems on Stable Processes [PDF]
Transactions of the American Mathematical Society, 1960 Here t and x are points of Rn, dx is n-dimensional Lebesgue measure, (Q, x) is the ordinary inner product in Rn, and I 1 2 = (, t). We will be mainly interested in properties of the sample functions of these processes. Our main theorems (?4) extend some results of McKean [10; 11] on the Hausdorff-Besicovitch dimension of the range of the sample ...
Blumenthal, R. M., Getoor, R. K.
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mSphereChinese fir (Cunninghamia lanceolata) is an economically important plantation tree species. Gaining insights into the belowground microbiome of Chinese fir is critical for optimizing plantation management and enhancing timber production.
Feihua Zhou +7 more
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Maharam extension and stationary stable processes
, 2012 We give a second look at stationary stable processes by interpreting the self-similar property at the level of the L\'evy measure as characteristic of a Maharam system.
Roy, Emmanuel
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GeodermaGlobal change factors like atmospheric nitrogen (N) deposition and drought pose threats to forest ecosystem including soil microbial diversity. However, how arbuscular mycorrhizal (AM) fungi associated with tree respond to N deposition and drought ...
Jiamian Shi +10 more
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Fluid evolution and hydrothermal alteration in the AN-34 and QT-02 IOCG prospects: clues for IOCG metallogenesis in the northern sector of the Carajás Mineral Province, Amazonian Craton [PDF]
Brazilian Journal of GeologyThe AN-34 and QT-02 iron oxide–copper–gold (IOCG) prospects are located in the northern portion of Carajás Mineral Province (CMP), where important copper IOCG deposits occur.
Gustavo Henrique Coelho de Melo +7 more
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