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Murpi – Murphystic Pictures =========================== It is possible to hang up a picture on two nails such that it falls down if only one of the two nails breaks. Since this is some kind of optimization of Murphy's law, I call such an arrangement "murphystic". This can be generalized to any number of nails and is a popular funny exercise on the theory of fundamental groups. Murpi is a program that generates such arrangements and visializes them as PostScript files. It is implemented in C++ and can be compiled as follows: ./autogen.sh ./configure make There is also a collection of sample outputs (converted to PDF): https://github.com/vog/murpi/raw/master/murpi.pdf