Abstract
This talk describes recent Joint work with Sergio Rajsbaum [3].
For models of concurrent computation in which processes may fail by crashing, each possible computation can be characterized as a simplicial complex, a geometric structure constructed by “gluing together” simplexes in a regular manner [6]. Informally, a complex is k-connected if it has no “holes” in dimension k or lower. It is known that if the complex corresponding to every such computation is k-connected, then one cannot solve (k + 1)-set agreement [4,5,6].
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Herlihy, M. (2010). Applications of Shellable Complexes to Distributed Computing. In: Gastin, P., Laroussinie, F. (eds) CONCUR 2010 - Concurrency Theory. CONCUR 2010. Lecture Notes in Computer Science, vol 6269. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-15375-4_2
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