Definition of time

摘要

The definition of physical time is suggested here, reflecting both its metric properties and topological concepts introduced by time dimension in space-time manifold; and the properties of continuous monotonic and forced increment of metrically detailed coordinate of massive particle in its coordinate tuple. Time ambivalence allows connecting the flow of time with variability of systems. Besides, the suggested definition of time includes two primary (undefined) concepts: time extent and increment of such extent.