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Autor:
Anazawa, Masahiro
The Hassell model has been widely used as a general discrete-time population dynamics model that describes both contest and scramble intraspecific competition through a tunable exponent. Since the two types of competition generally lead to different
Externí odkaz:
http://arxiv.org/abs/1812.09023
Autor:
Anazawa, Masahiro
This study investigates the effect of competition between individuals on population dynamics when they compete for different resources during different seasons or during different growth stages. Individuals are assumed to compete for a single resourc
Externí odkaz:
http://arxiv.org/abs/1007.0622
Publikováno v:
Physica A335:616-628,2004
In order to understand characteristics common to distributions which have both fractal and non-fractal scale regions in a unified framework, we introduce a concept of typical scale. We employ a model of 2d gravity modified by the $R^2$ term as a tool
Externí odkaz:
http://arxiv.org/abs/cond-mat/0307116
Autor:
Anazawa, Masahiro, Ishikawa, Atushi
Publikováno v:
Int.J.Mod.Phys. A17 (2002) 4069-4080
We study a disk amplitude which has a complicated heterogeneous matter configuration on the boundary in a system of the (3,4) conformal matter coupled to two-dimensional gravity. It is analyzed using the two-matrix chain model in the large N limit. W
Externí odkaz:
http://arxiv.org/abs/hep-th/0203209
Autor:
Anazawa, Masahiro, Ishikawa, Atushi
Publikováno v:
Prog.Theor.Phys. 104 (2000) 1309-1316
We study disk amplitudes whose boundaries have heterogeneous matter states in a system of $(4,5)$ conformal matter coupled to 2-dim gravity. They are analysed by using the 3-matrix chain model in the large $N$ limit. Each of the boundaries is compose
Externí odkaz:
http://arxiv.org/abs/hep-th/0011168
Autor:
Anazawa, Masahiro
Publikováno v:
Nucl.Phys.B569:680-692,2000
It is known that if we compactify D0-branes on a torus with constant B-field, the resulting theory becomes SYM theory on a noncommutative dual torus. We discuss the extension to the case of a H-field background. In the case of constant H-field on a t
Externí odkaz:
http://arxiv.org/abs/hep-th/9905055
Publikováno v:
Nucl.Phys. B514 (1998) 419-436
We study disk amplitudes whose boundary conditions on matter configurations are not restricted to homogeneous ones. They are examined in the two-matrix model as well as in the three-matrix model for the case of the tricritical Ising model. Comparing
Externí odkaz:
http://arxiv.org/abs/hep-th/9706038
Publikováno v:
Prog.Theor.Phys. 98 (1997) 457-462
We discuss the relation among some disk amplitudes with non-trivial boundary conditions in two-dimensional quantum gravity. They are obtained by the two-matrix model as well as the three-matirx model for the case of the tricritical Ising model. We ex
Externí odkaz:
http://arxiv.org/abs/hep-th/9705002
Autor:
Anazawa, Masahiro
We investigate the multi-loop correlators and the multi-point functions for all of the scaling operators in unitary minimal conformal models coupled to two-dimensional gravity from the two-matrix model. We show that simple fusion rules for these scal
Externí odkaz:
http://arxiv.org/abs/hep-th/9703095