Or the novel, "Permutation City", by Greg Egan. https://www.goodreads.com/book/show/156784.Permutation_City https://www.goodreads.com/book/show/156784.Permutati

Or the novel, "Permutation City", by Greg Egan. https://www.goodreads.com/book/show/156784.Permutation_City https://www.goodreads.com/book/show/156784.Permutation_City