The presence of risk premium is an issue that weakens the rational expectation hypothesis. This paper investigates changing behavior time varying for holding 10 year maturity bond using a bivariate VARMA-DBEKK-AGARCH-M model. model allows asymmetric premia, causality and co-volatility spillovers jointly in global markets. Empirical results show significant partial exist estimates premia bi-dire...

Superlattice Films Work function difference induces spontaneous charge donation and band bending at the interfaces of superlattices, which causes optimization effects modulation doping energy filtering, leading to remarkably enhanced thermoelectric performances. This optimizing strategy is successfully elucidated in 1T′-MoTe2/Bi2Te3 superlattice films. Meanwhile, rational manipulation interfaci...

The aim of this paper is to present a nice series of results, obtained in the papers of Chaitin [2], Solovay [5], Calude et al. [1], Kucera and Slaman [3]. This joint effort led to a full characterization of lower semicomputable random reals, both as those that can be expressed as a “Chaitin Omega” and those that are maximal for Solovay reducibility. The original proofs were somewhat involved; ...

The rational solutions with as denominators powers of to the elliptic diophantine equation y x x are determined An idea of Yuri Bilu is applied which avoids Thue and Thue Mahler equations and deduces four term S unit equations with special properties that are solved by linear forms in real and p adic logarithms Introduction In a recent paper SW my colleague R J Stroeker and I determined the com...

Let $L_{k,\alpha}^{\mathbb{Z}}$ denote the set of all bi-infinite $\alpha$-power free words over an alphabet with $k$ letters, where $\alpha$ is a positive rational number and integer. We prove that if $\alpha\geq 5$, $k\geq 3$, $v\in L_{k,\alpha}^{\mathbb{Z}}$, $w$ finite factor $v$, then there are $\widetilde v\in L_{k,\alpha}^{\mathbb{Z}}$ letter $x$ such v$ has only finitely many occurrence...

Solving tangle equations is deeply connected with studying enzyme action on DNA. The main goal of this paper to solve the system N(O+X1)=b1 and N(O+X2)=b2#b3, where X1 X2 are rational tangles, bi a 2-bridge link, for i=1,2,3, b2 b3 nontrivial. We under assumption Õ, double branched cover O, not hyperbolic, i.e. O π-hyperbolic. Besides, we also deal involving links only an algebraic tangle.

With the construction of high-speed railway lines in China, there are growing concerns about the rational transport cooperation between high-speed railway lines and conventional rail lines. A rational transport cooperation scheme can improve railway capacity utilization, train speed, service and the organization quality of railway transportation. The previous research mainly focused on the aspe...

The original analysis of sponsored search auctions by Varian and independently by Aggarwal et al. did not take into account the notion of reserve prices, which are common across all major search engines. We investigate this further and show that the separability assumption derived by Aggarwal et al. is not sufficient for aligning the greedy allocation employed by GSP and the efficient allocatio...

generalizing the concepts of -fuzzy (left, right, lateral) ideals, -fuzzy quasi-ideals and   -fuzzy bi (generalized bi-) ideals in ternary semigroups, the notions of -fuzzy (left, right, lateral) ideals, -fuzzy quasi-ideals and -fuzzy bi (generalized bi-) in ternary semigroups are introduced and several related properties are investigated. some new results are obtained.