Talk:PageRank

reference 44 links to dead page

Sorry for this kind of informing - I don't know wiki's workflow. And I do not claim that I may modify page by myself. — Preceding unsigned comment added by 89.79.154.219 (talk) 21:47, 13 January 2013 (UTC)

Profitable computer algorithm

Is this the most profitable computer algorithm ever? What is its commercial value?--22:57, 12 December 2010 (UTC)

Google Panda update

I think it should be mentioned the latest modification of this page ranking algorithm, as state here and here. In additional, we could create the graphs using the XLS file addateched to the first link. Xionbox^₪ 06:48, 15 April 2011 (UTC)

What does that have to do with PageRank? PageRank is not the sole essence of Google relevance calculations, it's only one of more than 200 ranking signals. What makes you think that this "Google Panda Update" is about the PageRank signal? -- X7q (talk) 06:53, 15 April 2011 (UTC)

I thought page rank was the essence of the Google ranking algorithm. This is why I thought modification of Google Panda had something to do with Page rank.

Xionbox^₪ 08:00, 15 April 2011 (UTC)

Not clear how PR(A) is calculated in Section 3.1

It says that PR(A) = PR(B)/2 + PR(C)/1 + PR(D)/3. However, according to the description in the text ("Suppose that page B has a link to page C as well as to page A, while page D has links to all three pages."), there's no link from C to A. So why does PR(C) appear in the equation? --91.14.208.203 (talk) 20:36, 26 June 2011 (UTC)

I cannot understand this too. I think this is correct: PR(A) = PR(B)/2 + PR(D)/3 Am I right or something is wrong? --93.80.151.174 (talk) 21:35, 11 May 2012 (UTC)

Difference between Page Rank and Page Ranking

There seems to be some blurring here around the difference between page rank and page ranking. For instance,

Other factors are also part of the algorithm such as the size of a page, the number of changes and its up-to-dateness, the key texts in headlines and the words of hyperlinked anchor texts.

These are part of Google's ranking algorithm, but not part of the page rank algorithm.

The Google Page Rank algorithm provides a numerical value which is used (unless discontinued) as part of the Google SERPs algorithm. — Preceding unsigned comment added by Oli4uk (talk • contribs) 21:34, 29 June 2011 (UTC)

"named after Larry Page[1]"

Tom Anderson has cited this article as a reference for this extremely dubious factoid, but the reference goes to a nonlink at Google. So I don't know whether this is a spoof, an April Fool's joke at Google, or truth. Can anyone support it? It probably should be deleted otherwise. · rodii · 15:28, 18 July 2011 (UTC)

That page disappeared only recently. There's still a copy in Google's cache dated Jul 12. There's a copy at archive.org which we can cite. -- X7q (talk) 15:35, 18 July 2011 (UTC)

I believe it should be "purported" to be named after the patent assigned to Larry Page, but may simply represent the ranking of web "pages" ... to cite a PR statement from Google doesn't seem to align with the realities of what IS - should we drink the Koolaid?

Problem with equations in 'Power Method' section

Some of the equations are not parsed properly in this section. It seems to be because a pair of curly braces are needed to define the scope of the \widehat operator, but have been omitted. I'm not sure of the correct scope of the operator so haven't fixed it. — Preceding unsigned comment added by 109.156.49.34 (talk) 21:20, 6 October 2011 (UTC)

Estimates on how many pages are PageRank 10, 9, 8, 7, 6, 5, 4, 3, 2, 1?

Here are pages that gives numbers for PageRank 10 and 9, I would like to know the others at least how many pages are 8, 7, 6, 5, 4, 3, 2, 1 PageRank?

1. http://www.doheth.co.uk/info/list-of-web-sites-with-high-page-rank.php
2. http://www.ipwebdesign.it/2010/07/paerank-list/

• PageRank 10= 12 pages (see the website above)
• PageRank 9 = 148 pages (see the website above)
• PageRank 8 = 1816 pages estimates
• PageRank 7 = 22330 pages estimates
• PageRank 6 = 274664 pages estimates
• PageRank 5 = 3378367 pages estimates
• PageRank 4 = 41553912 pages estimates
• PageRank 3 = 511113116 pages estimates
• PageRank 2 = 6286691331 pages estimates
• PageRank 1 = 73463463463 pages estimates

From PageRank 8 to 1 I have estimated by using two numbers from 10 and 9 but if anybody knows exact numbers let me know. MohammedBinAbdullah (talk) 22:02, 10 April 2012 (UTC)

My estimate would be.....

• PageRank 10= 10 pages estimates
• PageRank 9 = 100 pages estimates
• PageRank 8 = 1,000 pages estimates
• PageRank 7 = 10,000 pages estimates
• PageRank 6 = 100,000 pages estimates
• PageRank 5 = 1,000,000 pages estimates
• PageRank 4 = 10,000,000 pages estimates
• PageRank 3 = 100,000,000 pages estimates
• PageRank 2 = 1,000,000,000 pages estimates
• PageRank 1 = 10,000,000,000 pages estimates

Doubtcoachdoubtcoach (talk) 03:04, 15 September 2012 (UTC)

My estimate would be.....

• PageRank 10= 12 pages (see the website above)
• PageRank 9 = 148 pages (see the website above)
• PageRank 8 = 1500 pages estimates
• PageRank 7 = 12330 pages estimates
• PageRank 6 = 174664 pages estimates
• PageRank 5 = 2378367 pages estimates
• PageRank 4 = 31553912 pages estimates
• PageRank 3 = 411113116 pages estimates
• PageRank 2 = 4286691331 pages estimates
• PageRank 1 = 40463463463 pages estimates

113.203.171.207 (talk) 14:11, 26 September 2012 (UTC)

Page Rank or Page Score?

Hi,

I wanted to pose a question. Adding this may make the article complete.

Is it right to call it PageRank or PageScore?

The reason is -

In ranking - 1 is high and 10 is low

In score - 1 is low and 10 is high.

Google page rank of 1 is low and 10 is high. Hence PageScore may be appropriate.

Regards,

Sashidharan

http://in.linkedin.com/in/sashidharan Website: http://sashidharanb.wix.com/businesssolutions — Preceding unsigned comment added by 101.62.26.247 (talk) 13:32, 18 December 2012 (UTC)

This might be sound logic, but "PageRank" is a name which has been firmly established and recognized. Using "PageScore" would do nothing but confuse people reading this page. It's sort of like Coccinellidae, which goes by names such as "ladybird" or "ladybug" -- but in actuality it is neither a bird nor a bug (in the strictest sense). Sometimes names are wrong, but they continue to be used because it is what people already know and use as a reference point. Jefflithe (talk) 01:40, 21 December 2012 (UTC)

I understand that 'PageRank' is an established name. However, The 'Rank' part of it may confuse some users particular about 'Ranking', especially Ranking of assets etc. 'PageScore' is used here only for discussion purposes. I don't advise using 'PageScore' unless it is officially renamed. — Preceding unsigned comment added by 101.62.79.37 (talk) 16:50, 28 December 2012 (UTC)

Can someone check the MATLAB code, I believe it should be Norm(v,1)

Hi folks,

I was playing with this code, and couldnt get the PR results to sum to 1.0 (per the discussion at start of document). Looking at it, I believe that the problem is that the normalization doesn't cause it to sum to 1 - setting it to norm(v,1) does do this.

This might just have been random good luck on my part - but it meets the initial condition - that the random distribition of pagerank sums to 1.0, not so sure about why it needs to renormalized everytime though, that seems flaky. — Preceding unsigned comment added by 67.160.239.133 (talk) 05:26, 26 December 2012 (UTC)

Follow up - the example itself doesn't sum to one, running on Octave.

The reason I *believe* is at least partly due to the columns not all summing to one. I fixed this in my example code, by ensuring that Node has a SELF-LOOP (ie the diagonal is non zero), and by removing the L2 norm in the loop. Would love someone more knowledgeable than me to explain this though.

ans =

  0.54033
  0.30295
  0.30295
  0.45012
  0.56735  — Preceding unsigned comment added by 67.160.239.133 (talk) 19:58, 26 December 2012 (UTC) 

Update -- in looking at the paper Topic Sensitive Pagerank, (Taher H. Haveliwala) the author reports that if a Node has out degree == 0, then instead of just having a self-loop, assign an equal probability to going EVERYWHERE in the graph. — Preceding unsigned comment added by 63.194.72.222 (talk) 18:25, 4 January 2013 (UTC)