# Space-time as a causal set.

@article{Bombelli1987SpacetimeAA, title={Space-time as a causal set.}, author={Bombelli and Lee and Meyer and Sorkin}, journal={Physical review letters}, year={1987}, volume={59 5}, pages={ 521-524 } }

We propose that space-time at the smallest scales is in reality a causal set: a locally finite set of elements endowed with a partial order corresponding to the macroscopic relation that defines past and future. We explore how a Lorentzian manifold can approximate a causal set, noting in particular that the thereby defined effective dimensionality of a given causal set can vary with length scale. Finally, we speculate briefly on the quantum dynamics of causal sets, indicating why an appropriateā¦Ā Expand