Sigma models are a class of field theories where the fundamental fields constitute maps from a spacetime manifold to a target space endowed with rich geometric structures. These models have been ...

Let $(\Omega, \mathscr{a}, P)$ be a probability space and $\mathscr{B} \subset \mathscr{a}$ be a $\sigma$-field. Let $s$ with $1 < s < \infty$ be fixed. If $f \in L_s ...