A ?semigroup is a semigroup whose lattice of congruences is a chain with respect to inclusion. Schein 9] and Tamura 11] have investigated commutative ?semigroups, Trotter 13] exponential, Nagy 4] weakly exponential and Bonzini and Cherubini Spoletini 2] nite ?semigroups. The pupose of the present paper is to investigate archimedean weakly commutative and H?commutative ?semigroups. 1 Weakly comm...

Let x = (x1, . . . , xp) ′ ∼ N(0,Σ), where Σ is a p×p positive definite matrix. Assume that we have observed a sample of size n, (yi,xi) n i=1 and assume σ = 1. Consider simulating data by taking various combinations of (n, p,Σ,β) as follows: (a) n = 50, 500 (b) p = 100, 1000 (c) Σ = I,S0.1,S0.6 (d) casse (i) β1 = · · · = β5 = 3, βj = 0 for any other j; case (ii) β1 = · · · = β5 = 5, β6 = · · ·...

1991 Abstract. A topological space X is called A-real compact, if every algebra homomorphism from A to the reals is an evaluation at some point of X, where A is an algebra of continuous functions. Our main interest lies on algebras of smooth functions. In AdR] it was shown that any separable Banach space is smoothly real compact. Here we generalize this result to a huge class of locally convex ...

The design storm derived from intensity–duration–frequency (IDF) curves is the main input for hydrologic analysis or hydraulic flood control. regions with higher risks due to extreme precipitation are often deficient in gauges. This study presents a detailed evaluation of IDF using IMERG Final half-hourly (V06), fitted widely used CDFs: Gumbel and MLE, MM, Pearson 3, GEV. As benchmarks followin...

Nitrogen (N) and sulfur (S) are essential nutrients for optimum plant growth. A commercial-grade biosolid-enriched ammonium sulfate (Bio/AMS) was evaluated compared with a conventional, (AMS) to investigate the release patterns of N S in soils. The laboratory-based studies included (a) characterization fertilizer sources, (b) soil leaching columns 0.01% citric acid an soil, (c) incubation follo...