Although the concept of ‘lucid dreaming’ was fi rst coined by Frederik Willems van Eeden, a Dutch psychiatrist, and introduced at the meeting of The Society for Psychical Research held on 22 April 1913, the phenomenon of lucid dreaming was already known in earlier historical periods and its descriptions can be found in writings of Aristotle. However, modern lucid dreaming research was establish...

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Incrementalization is at the core of a systematic program design method, especially for the design of algorithms and data structures. It takes a function and an input change operation and yields an incremental function that computes each new output by using the old output and additional values. It is the analogue of differentiation in continuous domains. This article gives an overview of a syst...