2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/32970This paper presents a new distributed computational model of distributed systems called the phase web that extends V. Pratt's orthocurrence relation from 1986. The model uses mutual-exclusion to express sequence, and a new kind of hierarchy to replace event sequences, posets, and pomsets. The model explicitly connects computation to a discrete Clifford algebra that is in turn extended into homology and co-homology, wherein the recursive nature of objects and boundaries becomes apparent and itself subject to hierarchical recursion. Topsy, a programming environment embodying the phase web, is available from www.cs.auc.dk/topsy.16 pages, 3 figuresDistributed, Parallel, and Cluster ComputingNeural and Evolutionary ComputingF.1; E.2; D.1; I.4text