Alpern, BowenSchneider, Fred B.2007-04-232007-04-231985-10http://techreports.library.cornell.edu:8081/Dienst/UI/1.0/Display/cul.cs/TR85-650https://hdl.handle.net/1813/6495A formal definition for liveness properties is proposed. It is argued that this definition captures the intuition that liveness properties stipulate that "something good" eventually happens during execution. A topological characterization of safety and liveness is given. Every property is shown to be the intersection of a safety property and a liveness property.692044 bytes520459 bytesapplication/pdfapplication/postscripten-UScomputer sciencetechnical reporttechnical report