286Re: sorry,not the 3.14 in the 1st version,but 2st version
- Dec 8, 2003--- In email@example.com, "chenyu468" <chenyu468@y...> wrote:
> By the way, I have 2 stupid pre-questions:1. This is not supposed to be an implementation of a search engine,
> 1. Why it is necessary to search a path of links from one URL to the
> other URL? When we search through google, we always entry "key word"
> not "URL". If we know the "URL" already, what's the need to search
> through "google?
> 2. What's the meaning of "predecessor function"?
> 2.1 In the version 1 of AIMA, I can't find this concept in the Index
but I think more of a "six degrees of websites" question. (Apologies
to Kevin Bacon! See http://www.geocities.com/theeac/bacon.html )
The question is just saying that for this problem a search engine can
be used to implement a predecessor function.
2. From the text,
"Let the predecessors of a node n, Pred(n), be all those nodes that
have n as a successor. Bidirectional search requires that Pred(n) be
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