Here's a soild SF book that deals a fair bit with that question: http://gregegan.customer.netspace.net.au/PERMUTATION/Permutation.html http://gregegan.customer

Here's a soild SF book that deals a fair bit with that question: http://gregegan.customer.netspace.net.au/PERMUTATION/Permutation.html http://gregegan.customer.netspace.net.au/PERMUTATION/Permuta...