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Let (Ω, J, P; J s,t) be a probability space with a family of sub-σ-algebras indexed by (s, t) ∈ [ 0, ∞) × [ 0, ∞), satisfying the usual conditions. Let X(s,t) be a solution of a stochastic ...

These unusual structures - with their intricate designs and symmetrical forms - may look like they have been created by a 3D printer, but they are in fact more than a century old. Displayed at the ...