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Chapter 11 Spatio-Temporal Extents > 11.5 Ordinary Physical Objects - Pg. 128

128 Chapter 11 SPATIO-TEMPORAL EXTENTS Extended history: the spatio-tem- poral extent that is all space from Pre-history the point in time that the object first existed, to the point in time Post-history after which it no longer ever exists Extended pre-history: the spatio- Extended history temporal extent that is all space until the last point in time that the Extended pre-history object exists Extended post-history Time Extended post-history: the spatio- temporal extent that is all space Figure 11-4 The relationship between an object and time. after the first point in time that the object existed Other useful operators are: Historical connection: when the historical closures of two objects meet or overlap Historical part: when the part falls within the historical closure of the Historical closure Space Space