Summer School 2026

Spacetime has 3+1 dimensions, and there are many good reasons why Nature works so well in

this setup. We’ll discuss how many physical phenomena (within classical physics, relativity,

thermodynamics and statistical physics) depend on dimensionality, treat the hyperbolic structure

of partial differential equations, see how that uniquely fits to Lorentzian spacetimes and look at

concepts that rely exclusively on three spatial dimensions. We run a few thought experiments

how Nature would appear to us if the dimensionality of spacetime was wildly different.