On Siebenmann periodicity

On Siebenmann Periodicity

Cappell and Weinberger gave a geometric interpretation of the Siebenmann periodicity phenomena. This near-periodicity on the structure sets of topological manifolds was originally demonstrated in an indirect way from the periodicity of the simply-connected quadratic L-groups, see Nicas and Siebenmann (1977). In particular it was shown for a topological manifold M , dim M ≥ 5, with structure set...

Periodicity properties on partial

The concept of periodicity has played over the years a centra1 role in the development of combinatorics on words and has been a highly valuable too1 for the design and analysis of algorithms. Fine and Wilf’s famous periodicity result, which is one of the most used and known results on words, has extensions to partia1 words, or sequences that may have a number of “do not know” symbols. These ext...

Controls on Geyser Periodicity

(Carnegie Institution of Washington, Washington, DC, 1919); P. M. Brown, M. K. Hughes, C. H. Baisan, T. W. Swetnam, A. C. Caprio, Tree-Ring Bull., in press]. 11. R. J. Hartesveldt, Nat. Hist. 73, 12 (1964); N. L. Stephenson, D. J. Parsons, T. W. Swetnam, in Proceedings-17th Tall Timbers Fire Ecology Conference, Tallahassee, FL, 18 to 21 May 1989 (Tall Timbers Research Station, Tallahassee, FL, ...

Periodicity and Almost-periodicity

On Periodicity in Temporal Databases

The issue of periodicity is generally understood to be a desirable property of temporal data that should be supported by temporal database models and their query languages. Nevertheless, there has so far not been any systematic examination of how to incorporate this concept into a temporal DBMS. In this paper we describe two concepts of periodicity, which we call strong periodicity and near per...