Dimension - Spacetime

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

would lead to unstable atoms and planetary orbits. 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 Spacetime Dimension