CARL FAITH All rings considered are commutative with unit. A ring R is SISI (in Vámos' terminology) if every subdirectly irreducible factor ring R/I is self-injective . SISI rings include Noetherian rings, Morita rings, and almost maximal valuation rings ([Vil) . In [F3] we raised the question of whether a polynomial ring R[-1 over a SISI ring R is again SISI . In this paper we show this is not...

 Following the growing urbanization, choosing and providing housing has become one of the mos t important issues for planners as well as people. Developing a comprehensive program of housing needs complete identification and deep analysis of widespread dimensions of housing and factors affecting them. In the meantime, addressing housing indices, as the key planning tool forming its main thrus t...

Based on differences between residential mortgage appraisals and automated valuation model (AVM) valuations from a leading valuation firm, at least 15% of non-agency securitized loans originated between 2001 and 2007 have upwardly biased appraisals, which cause average collateral value to be overstated by almost 5%. Simulations and internal data from a large lender that include funded loans and...

Deep learning will help us to better design text mining applications, but perhaps not remove the computational linguistic design process associated with text mining applications (Manning, 2015). There has been extensive work on applying deep learning algorithms to different text mining applications such as information retrieval (IR) and information extraction (IE) and so far they have improved ...

This paper discusses the standard welfare economics assumption anthropocentric welfarism, i.e. that only human well-being counts intrinsically. New survey evidence from a representative sample in Sweden is presented, indicating that anthropocentrism is strongly rejected, on average. However, most people appear to have a consequentialistic ethics, in line with conventional welfare economics. The...

This paper discusses a fundamental market failure regarding environmental conservation, and how the problem can be solved by appropriate policies. A "seller" (or owner of a tropical forest) may be motivated to conserve if a "buyer" is expected to pay. The buyer, however, does not find it necessary to pay as long as the seller conserves in any case. This contradiction implies that the forest wil...

L is a continuous function from R× into X and f is a continuous function from R to X . The theory of functional differential equations with infinite delay has been developed by several authors. The fundamental task of that kind of equations is the choice of phase space . Since the history function t→ ut is not continuous in general if u : (−∞,T] → X is continuous (where T > 0). The paper [9] co...

Given two finite sets of integers S ⊆ N \ {0} and D ⊆ N \ {0, 1}, the impartial combinatorial game i-Mark(S,D) is played on a heap of tokens. From a heap of n tokens, each player can move either to a heap of n − s tokens for some s ∈ S, or to a heap of n/d tokens for some d ∈ D if d divides n. Such games can be considered as an integral variant of Mark-type games, introduced by Elwyn Berlekamp ...

Co-author: Lúıs Castro We will present a study of the Fredholm property for matrix Wiener-Hopf plus/minus Hankel operators with semi-almost periodic Fourier symbols. The Fredholm property will be described based on certain factorizations of the representatives at infinity of the original symbols, and on the geometrical mean values of the corresponding factors. The Fredholm indices of those oper...