Monday, December 15, 2008

Re: One question about Authority/Hub computation

By  "different", I assume you referring to them having different results during  intermediate iterations, right?
We are not really interested in a1 and h1--but rather in a* and h*. Both reach the same fix point. [I suspect the rate of convergence for the first method is going to be faster--for the same reason asynchronous iterations on pagerank make it converge faster.]


On Sun, Dec 14, 2008 at 5:05 PM, Jianhui Chen <> wrote:
Hello, Dear Dr. Rao,

I have a question about the computation of Authority / Hub score as below:
If a0 and h0 are pre-given, let A be the adjacent matrix, we can
compute a1 and h1 via
following two approaches theoretically

1. a1 = A' * h0, h1 = A * a1
2. a1 = (A' * A) * a0, h1 = (A * A') * h0.

However, in generally, the two approaches would generate different result.

Could you please help to advice which one we should take for the computation?

Sorry for disturbing you during the weekend. Many thanks.


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