We consider the formal maps in any finite dimension d with coefficients an integral domain K identity. Those invertible under composition form a group [inline-graphic 1i]. centraliser Cg of element g ∈ 1i] infinite order, tangent to identity If has order and is field characteristic zero, we show that contains isomorphic copy additive (K, +). positive characteristic, uncountable abelian subgroup...

This special issue of IEEE Security & Privacy offers some experience how the formal methods (FM) community, working in partnership with sponsors and users, is achieving a broader use this critical technology at increasing levels scale. Formal have rich history spanning half-century. Mathematical proofs properties programs been sought since early days computing. Despite these aspirations, FMs no...