Methods of constructing quasisolutions in inverse boundary-value aerohydrodynamics problems© 2014, Allerton Press, Inc. The different quasisolutions of the inverse
boundary-value problem Integration over non-rectifiable curves and Riemann boundary value problems on the
boundary is considered. As an application, solvability conditions of the Riemann
boundary value problem Index of Twisted Elliptic Boundary Value Problems Associated with Isometric Group Actions$$ with
boundary and a $$\Gamma$$ -invariant elliptic
boundary value problem $$\mathcal{D}$$ on $$M$$ , we consider
Index of Twisted Elliptic Boundary Value Problems Associated with Isometric Group Actions and a $\Gamma$-invariant elliptic
boundary value problem $\mathcal{D}$ on $M$, we consider its twisting