We study the π-calculus, enriched with pairing and non-blocking input, and define a notion of type assignment that uses the type constructor →. We encode the circuits of the calculus X into this variant of π, and show that all reduction (cut-elimination) and assignable types are preserved. Since X enjoys the Curry-Howard isomorphism for Gentzen’s calculus LK, this implies that all proofs in LK ...

method contracts are fully compatible with contract deltas, with the restriction that assignable clauses may not be changed. The only difference is that all changes specified in a delta are acted upon in the definition section of an abstract contract—the abstract section remains completely unchanged. In our example, the application of the delta in Fig. 2.7 results in an abstract contract with t...

Lithocarpus vuquangensis Ngoc & Hung is described from Vu Quang National Park, North Central Vietnam. The morphological comparison and phylogenetic analysis based on rbcL, matK and ITS provided evidence that the new species was not assignable to any of the previously known taxa in Vietnam and its surrounding countries. The description, photographs, preliminary conservation status and DNA barcod...

We study the π-calculus, enriched with pairing and non-blocking input, and define a notion of type assignment that uses the type constructor →. We encode the circuits of the calculus X into this variant of π, and show that all reduction (cut-elimination) and assignable types are preserved. Since X enjoys the Curry-Howard isomorphism for Gentzen’s calculus LK, this implies that all proofs in LK ...

A viologen–phenylene–imidazole (VPI) conjugate, previously shown to be singly complexed by CB[7] and doubly bound CB[8], is herein form antiparallel triple stacks in water with cucurbit[10]uril (CB[10]), pairwise complexing the guest trimer. The quinary host:guest 2:3 complex showed features assignable charge-transfer interactions. Under reductive conditions, CB[10] could solubilize a VPI radic...

SOCIAL CLASSES.-The basic unit of the social class grouping is the occupational group. Every occupation in the country, of which there are many thousands, is assignable to one or other of 586 occupational unit groups (General Register Office, 1951). These 586 occupational groups are each assigned as a whole to one or other of five social classes (Table I), on the basis of the predominant charac...

A new ruthenium(ii) polypyridyl-platinum(ii) diethynyl triad containing 3-ethynylphenanthroline linked by platinum(ii) bis-tributylphosphine organometallics, Ru(ii)-Pt(ii)-Ru(ii), and platinum(ii) bis-ethynylphenanthroline complex has been prepared. The ruthenium(ii)-metal triads, Ru(ii)-M-Ru(ii) (M = Pt(ii) and Au(i)), showed typical MLCT absorption bands and a lowest energy pi-pi* absorption ...

Control charts are widely implemented in firms to establish and maintain statistical control of a process which leads to the improved quality and productivity. Design of control charts requires that the engineer selects a sample size, a sampling frequency and the control limits for the chart. In this paper, a possible combination of design parameters is considered as a decision making unit whic...

In this paper we present several algorithms which combine a partial enumeration with meta-heuristics for the solution of general mixed-integer programming problems. The enumeration is based on the primal values assignable to the integer variables of the problem. We develop some algorithms for this integration, and test them using a set of well-known benchmark problems. Key-words: Enumeration, L...

This paper studies the relation between types and normalization in the context of Combinator Systems. It presents notions of approximants for terms, intersection type assignment, and reduction on derivations; the last will be proved to be strongly normalizable. With this result, it is proved that, for every typeable term, there exists an approximant of that term with the same type, and a charac...