E is a theorem prover for full first-order logic with equality. It reduces first-order problems to clause normal form and employs a saturation algorithm based on the equational superposition calculus. E is built on shared terms with cached rewriting, and employs several innovations for efficient clause indexing. Major strengths of the system are automatic problem analysis and highly flexible se...

Stephan’s Quintet (SQ), discovered more than 100 years ago, is the most famous and well studied compact galaxy group. It has been observed in almost all wavebands, with the most advanced instruments including Spitzer, GALEX, HST, Chandra, VLA, and various large mm/submm telescopes/arrays such as the IRAM 30m and BIMA. The rich multi-band data reveal one of the most fascinating pictures in the u...

Freefinement is an algorithm that constructs a sound refinement calculus from a verification system under certain conditions. In this paper, a verification system is any formal system for establishing whether an inductively defined term, typically a program, satisfies a specification. Examples of verification systems include Hoare logics and type systems. Freefinement first extends the term lan...

TLA+ is a language intended for the high-level specification of reactive, distributed, and in particular asynchronous systems. Combining the linear-time temporal logic TLA and classical set-theory, it provides an expressive specification formalism and supports assertional verification.

Zusammenfassung. Wissen, Medien und Design entfalten gemeinsam eine sozio-technische Dynamik, die das neue Forschungsund Praxisfeld des Knowledge Media Designs (KMD) begründet. Hier treffen sich theoretische, gestalterische und technische Fächer, die neue Methoden und Forschungsformate entsprechend ihren erweiterten Wirkungsmöglichkeiten entwickeln. Unter dem Aspekt der Gestaltung werden in der...