Relational and Algebraic Methods in Computer Science: 19th International Conference, RAMiCS 2021, Marseille, France, November 2-5, 2021, Proceedings

Unary-determined distributive l-magmas and bunched implication algebras.- Effect Algebras, Girard Quantales and Complementation in Separation Logic.- Relational Computation of Sets of Relations.- Experimental Investigation of Su cient Criteria for Relations to Have Kernels.- lr-Multisemigroups, Modal Quantales and the Origin of Locality.- Abstract Strategies and Coherence.- Algorithmic correspondence for relevance logics, bunched implication logics, and relation algebras via an implementation of the algorithm PEARL.- The class of representable semilattice-ordered monoids is not a variety.- Accretive Computation of Global Transformations.- Some modal and temporal translations of generalized basic logic.- Isolated Sublattices and their Application to Counting Closure Operators.- Second-Order Properties of Undirected Graphs.- Relation-algebraic Verification of Bor uvka's Minimum Spanning Tree Algorithm.- Deciding FO-definability of Regular Languages.- Relational Models for the Lambek calculus with Intersection and Unit.- Free Modal Riesz Spaces are Archimedean: a Syntactic Proof.- Polyadic spaces and profinite monoids.- Time Warps, from Algebra to Algorithms.- On Algebra of Program Correctness and Incorrectness.- Computing Least and Greatest Fixed Points in Absorptive Semirings.- A Variety Theorem for Relational Universal Algebra. -On Tools for Completeness of Kleene Algebra with Hypotheses. -Skew metrics valued in Sugihara semigroups.- Computing Aggregated Knowledge as the Greatest Lower Bound of Knowledge.- Relational Sums and Splittings in Categories of L-fuzzy Relations.- Change of Base using Arrow Categories.- Automated Reasoning for Probabilistic Sequential Programs with Theorem Proving.- Domain Range Semigroups and Finite Representations.