General Green's function formalism for layered systems: Wave function approach

Green’s Function Formalism for Highly Correlated Systems

We present the Composite Operator Method (COM) as a modern approach to the study of strongly correlated electronic systems, based on the equation of motion and Green’s function method. COM uses propagators of composite operators as building blocks at the basis of approximate calculations and algebra constrains to fix the representation of Green’s functions in order to maintain the algebraic and...

An Extension of the Thermodynamic Formalism Approach to Selberg's Zeta Function for General Modular Groups

Analysis of the pion wave function in light - cone formalism ∗

Several general constraints are suggested to analyze the pionic valence-state wave function. It is found that the present model wave functions used in lightcone formalism of perturbative quantum chromodynamics have failed these requirements to fit the pionic formfactor data and the reasonable valence-state structure function which does not exceed the pionic structure function data for x → 1 sim...

Construction of strict Lyapunov function for nonlinear parameterised perturbed systems

In this paper, global uniform exponential stability of perturbed dynamical systems is studied by using Lyapunov techniques. The system presents a perturbation term which is bounded by an integrable function with the assumption that the nominal system is globally uniformly exponentially stable. Some examples in dimensional two are given to illustrate the applicability of the main results.

Practical common weights scalarizing function approach for efficiency analysis

A characteristic of Data Envelopment Analysis (DEA) is to allow individual decision making units (DMUs) to select the factor weights which are the most advantageous for them in calculating their efficiency scores. This flexibility in selecting the weights, on the other hand, deters the comparison among DMUs on a common base. For dealing with this difficulty and assessing all the DMUs on the sam...