In this article, we solve the equivalence problem for 2–nondegenerate CR geometries that have (at every point) a homogeneous space G/H as maximally symmetric model G simple real Lie group of automorphisms. This completes classification submanifolds in complex are models with automorphism group. particular, construct (local) embeddings these into space.

Code equivalence is a well-known concept in coding theory. Recently, literature saw an increased interest this notion, due to the introduction of protocols based on hardness finding between two linear codes. In paper, we analyze security code equivalence, with special focus hardest instances, cryptographic usage. Our work stems from thorough review existing literature, identifies various types ...