2 problems

Let $A^+$ and $A^-$ denote the positive and negative parts of the normal principal-symbol operator, with corresponding projections $P^+$ and $P^-$; let $P^0$ project onto its kerne…

Let $E_q$ be the fiber at a boundary point $q$, let $E_{f(q)}$ be the fiber at its image under the boundary map $f$, and set … For boundary data … let $\widetilde{A}$ be the self-a…