Graph homomorphisms are used to study good characterizations for coloring problems (Trans. Amer. Math. Soc. 384 (1996), 1281–1297; Discrete Math. 22 (1978), 287–300). Particularly, the following concept arises in this context: A pair of graphs (A, B) is called a homomorphism duality if for any graph G either there exists a homomorphism σ : A→ G or there exists a homomorphism τ : G → B but not b...

We present a version of the APT based on an asset index set of an arbitrary infinite cardinality. Under assumptions due to Ross (1976, J. Econ. Theory 13, 341 360) and Chamberlain and Rothschild (1983, Econometrica 51, 1281 1303), we show that, in the absence of gains from asymptotic arbitrage, the square of the deviations of the individual rates of return from a factor-pricing formula sum to a...

Adolph, E. P., and Molnar, G. W. (1946). Amer. 7. Physiol., 146, 507. Benzinger, T. H. (1962). 22nd Congress of International Union of Physiological Sciences, Leiden, vol. 1, Pt. 1, p. 415 (International Congress Series, No. 47.) Amsterdam. Burton, A. C., and Edholm, 0. G. (1955). Man in a Cold Environment, p. 213. London. Carlson, L. D. (1954). Proc. Soc. exp. Biol. (N.Y.), 85, 303. Clarke, R....

This paper investigates repetitive purchase decisions of perishable items in the face of uncertain demand (the newsvendor problem). The experimental design includes: high, or low profit levels; and uniform, or normal demand distributions. The results show that in all cases both learning and convergence occur and are effected by: (1) the mean demand; (2) the order-size of the maximal expected pr...

We have previously postulated a serine gated electron transfer hypothesis (Inorg. Chem, 2002, 41, 1281-1291) to possibly be involved in gating electron transfer between the Mo(V) and Mo(IV) states. In this study we explored the effect of solvent dielectric upon the rate and mechanism of isomerization of an oxo-Mo(V) core in attempt to understand the effect of solvent polarity to the isomerizati...

Tingkat pesaing perguruan tinggi setiap tahunnya mengalami peningkatan yang sangat pesat. Dalam proses mendapatkan mahasiswa baru memiliki strategi promosi berbeda-beda, seiring perkembangan teknologi maka pihak dapat memanfaatkan data mining dalam upaya promosi. Data menjadi sebuah dasar atau pedoman untuk menentukan kebijakan bisnis perusahaan. penghematan biaya dilakukan pemetaan lokasi Pene...

Purpose This paper examines the conditions under which ancient peoples might have developed a concept of “sustainability,” and concludes that long-term resource management practices would not have been articulated prior to the development of the first cities starting c. 6,000 years ago. Methodology/approach Using biological concepts of population density and niche-construction theory, cities ar...