Is Stephen Wolfram’s “A New Kind of Science” Bullshit? Computer Science |
- Is Stephen Wolfram’s “A New Kind of Science” Bullshit?
- Help me understand this statement from Theory of Computation by Peter Linz
- Become a Cybersecurity specialist
| Is Stephen Wolfram’s “A New Kind of Science” Bullshit? Posted: 21 Apr 2018 08:23 PM PDT Here's one critique by physicist Steven Weinberg I found interesting: He says, "Wolfram himself is a lapsed elementary particle physicist, and I suppose he can't resist trying to apply his experience with digital computer programs to the laws of nature. This has led him to the view (also considered in a 1981 paper by Richard Feynman) that nature is discrete rather than continuous. He suggests that space consists of a set of isolated points, like cells in a cellular automaton, and that even time flows in discrete steps. Following an idea of Edward Fredkin, he concludes that the universe itself would then be an automaton, like a giant computer. It's possible, but I can't see any motivation for these speculations, except that this is the sort of system that Wolfram and others have become used to in their work on computers. So might a carpenter, looking at the moon, suppose that it is made of wood." [link] [comments]  |
| Help me understand this statement from Theory of Computation by Peter Linz Posted: 21 Apr 2018 10:34 PM PDT "If between two vertices vi and vj there is any walk labeled w, then there must be some walk labeled w of length no more than Λ + (1 + Λ) |w|, where Λ is the number of λ- edges in the graph. The argument for this is: While λ-edges may be repeated, there is always a walk in which every repeated λ-edge is separated by an edge labeled with a nonempty symbol. Otherwise, the walk contains a cycle labeled λ, which can be replaced by a simple path without changing the label of the walk." I am also having difficulty in understand extended transition function for an nfa , would be really helpful if someone could explain that. [link] [comments]  |
| Become a Cybersecurity specialist Posted: 21 Apr 2018 09:34 AM PDT |
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