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@msh210 A "Nachlass" is written after the person cited is deceased, so the "dagger" means "died". (If it indicated a footnote, it would be written in "superscript" style)
Greg Egan's homepage has some (sadly non-open) Java Applets illustrating concepts possibly mentioned or explored in his books. These being Java Applets, do I hear someone say "(better) dead technology?". Well, yes, but I always thought about taking time out to write a screensaver doing the deBruijn plane tiling