Unfortunately, many people in the UK aren’t eligible so can’t take advantage of this. Indirectly. As has left EU, it now separate systems and regulations its citizens lost right to free movement. Meanwhile, EU launched a digital covid certificate facilitate movement, which will be issued recognised by all states. The contains QR code showing that …

The goal of this paper is to introduce the notion of certificates, which verify the accuracy of solutions of computational problems with convex structure. Such problems include minimizing convex functions, variational inequalities with monotone operators, computing saddle points of convex-concave functions, and solving convex Nash equilibrium problems. We demonstrate how the implementation of t...

We give the first linear-time certifying algorithms to recognize split graphs, threshold graphs, chain graphs, co-chain graphs and trivially perfect graphs, with sublinear certificates for negative output. In case of membership in a given graph class our algorithms provide as certificate a structure for the input graph that characterizes the class, and in case of non-membership they provide as ...

We show that Connes’ embedding conjecture on von Neumann algebras is equivalent to the existence of certain algebraic certificates for a polynomial in noncommuting variables to satisfy the following nonnegativity condition: The trace is nonnegative whenever self-adjoint contraction matrices of the same size are substituted for the variables. These algebraic certificates involve sums of hermitia...

The paper analyzes SCEP, the Simple Certificate Enrollment Procedure, a two-way communication protocol to manage the secure emission of digital certificates to network devices. The protocol provides a consistent method of requesting and receiving certificates from different Certification Authorities by offering an open and scalable solution for deploying certificates which can be beneficial to ...