TY - BOOK ID - 7765687 TI - Cardinal Invariants on Boolean Algebras : Second Revised Edition PY - 2014 SN - 3034807295 3034807309 PB - Basel : Springer Basel : Imprint: Birkhäuser, DB - UniCat KW - Algebra, Boolean KW - Functions KW - Cardinal numbers KW - Mathematics KW - Physical Sciences & Mathematics KW - Mathematical Theory KW - Algebra, Boolean. KW - Functions. KW - Cardinal numbers. KW - Arithmetic, Cardinal KW - Cardinal arithmetic KW - Cardinals (Numbers) KW - Numbers, Cardinal KW - Analysis (Mathematics) KW - Boolean algebra KW - Boole's algebra KW - Mathematics. KW - Algebra. KW - Ordered algebraic structures. KW - Mathematical logic. KW - Mathematical Logic and Foundations. KW - Order, Lattices, Ordered Algebraic Structures. KW - Set theory KW - Transfinite numbers KW - Differential equations KW - Mathematical analysis KW - Numbers, Complex KW - Calculus KW - Algebraic logic KW - Logic, Symbolic and mathematical. KW - Algebra of logic KW - Logic, Universal KW - Mathematical logic KW - Symbolic and mathematical logic KW - Symbolic logic KW - Algebra, Abstract KW - Metamathematics KW - Syllogism KW - Algebraic structures, Ordered KW - Structures, Ordered algebraic KW - Algebra UR - https://www.unicat.be/uniCat?func=search&query=sysid:7765687 AB - This book is concerned with cardinal number valued functions defined for any Boolean algebra. Examples of such functions are independence, which assigns to each Boolean algebra the supremum of the cardinalities of its free subalgebras, and cellularity, which gives the supremum of cardinalities of sets of pairwise disjoint elements. Twenty-one such functions are studied in detail, and many more in passing. The questions considered are the behaviour of these functions under algebraic operations such as products, free products, ultraproducts, and their relationships to one another. Assuming familiarity with only the basics of Boolean algebras and set theory, through simple infinite combinatorics and forcing, the book reviews current knowledge about these functions, giving complete proofs for most facts. A special feature of the book is the attention given to open problems, of which 185 are formulated. Based on Cardinal Functions on Boolean Algebras (1990) and Cardinal Invariants on Boolean Algebras (1996) by the same author, the present work is much larger than either of these. It contains solutions to many of the open problems of the earlier volumes. Among the new topics are continuum cardinals on Boolean algebras, with a lengthy treatment of the reaping number. Diagrams at the end of the book summarize the relationships between the functions for many important classes of Boolean algebras, including interval algebras, tree algebras and superatomic algebras. ER -