Spacetime - Dimension

: The historical foundation of spacetime. Minkowski's mathematical formalism established the idea of a four-dimensional world where space and time are inextricably linked into a single continuum. Theoretical Frameworks with Extra Dimensions

would make physics unpredictable because partial differential equations would lack the "hyperbolicity" property. Spacetime Dimension

Several foundational and modern papers explore the dimensionality of spacetime, ranging from explaining why our universe has 3 spatial and 1 temporal dimension to theoretical frameworks involving multiple time dimensions or "scale-dependent" dimensionality. Landmark Papers on Spacetime Dimensions : The historical foundation of spacetime

might be too simple to support observers. You can read the full text at arXiv:gr-qc/9702052 . would lead to unstable atoms and planetary orbits

would lead to unstable atoms and planetary orbits.

: This is one of the most cited papers on this topic. Tegmark argues that our 3+1 dimensional spacetime (3 space, 1 time) is "privileged." He demonstrates that: