Here the authors formulate and explore a new axiom of set theory, CPA, the Covering Property Axiom. CPA is consistent with the usual ZFC axioms, indeed it is true in the iterated Sacks model and actually captures the combinatorial core of this model. A plethora of results known to be true in the Sacks model easily follow from CPA. Replacing iterated forcing arguments with deductions from CPA simplifies proofs, provides deeper insight, and leads to new results. One may say that CPA is similar in nature to Martin's axiom, as both capture the essence of the models of ZFC in which they hold. The exposition is self contained and there are natural applications to real analysis and topology. Researchers who use set theory in their work will find much of interest in this book.
A new edition of a book on sales and leases of goods by two of the country's leading experts in commercial law. The book uses a problem-based approach to help students master the applicable legal rules, understand how the law applies to both simple and complex commercial transactions, and learn how to use the law in planning transactions and drafting agreements. The book consists primarily of text and carefully sequenced problems. Many of the problems ask students to apply the law to a set of facts. Others do the reverse, asking students to identify a set of facts to which a specific rule applies. The remainder prompt students to think about the policies underlying the law or how the law affects commercial behavior or do a bit of contract drafting. An extensive teacher's manual, available in both print and electronic format, contains suggestions on teaching methodology and a detailed analysis of all problems. PowerPoint slides custom designed for almost every problem are available to teachers on the web site for the book..