We develop a general purpose local search algorithm for binary optimization problems, whose complexity and performance are explicitly controlled by a parameter Q, measuring the depth of the local search neighborhood. We show that the algorithm is pseudo-polynomial for general cost vector c, and achieves a w 2 2w−1 approximation guarantee for set packing problems with exactly w ones in each colu...

In this paper, new definitions of $L$-fuzzy closure operator, $L$-fuzzy interior operator, $L$-fuzzy remote neighborhood system, $L$-fuzzy neighborhood system and $L$-fuzzy quasi-coincident neighborhood system are proposed. It is proved that the category of $L$-fuzzy closure spaces, the category of $L$-fuzzy interior spaces, the category of $L$-fuzzy remote neighborhood spaces, the category of ...

abstract: one of the most important and complicated social transitions has been growth of worldwide urbanization. the rapid growth of urbanization and cities has had different consequences which is associated with much urban vulnerability. physical, installation, environmental, economical and social inequalities have been the results of such urban growth. this paper aims to study and identify t...

1. The main purpose of this paper is to show that certain properties of a metrizable space, such as local connectedness or local contractibility or LCn or local compactness, hold uniformly with a properly chosen metric.2 This result, while easy to prove, seems to be new, and often permits simplifications in proofs dealing with various kinds of local connectedness. In §2, we obtain an analogous ...

Let w ∈ 1{0, 1} * and let a w (n) be the number of occurrences of the word w in the binary expansion of n. Let {s(n)} n0 denote the Stern sequence, defined by s(0) = 0, s(1) = 1, and for n 1 s(2n) = s(n), and s(2n + 1) = s(n) + s(n + 1). In this note, we show that s(n) = a 1 (n) + w∈1{0,1} * s([w] 2)a w1 (n) where w denotes the complement of w (obtained by sending 0 → 1 and 1 → 0) and [w] 2 den...

regarding iranian old cities, neighborhood has been a real place to live, a space for social interaction as well as economic activities. the concept of neighborhood has always been accompanied with senses of well-being, security and identity. in parallel with urban developments and changing lifestyles, neighborhoods have also faced the significant changes. in tehran as the capital, the changes ...

background: the purpose of this study is to determine association between personal, family, neighborhood, and social network characteristics and perceived intimacy in the neighborhood by the women. methods: in this cross‑sectional study, we applied a two‑stage sampling method to choose a representative sample of 150 married women and housewives, aged 15 to 49 years, who had education between si...

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