Take a look at this

Jim · 2004-06-21, 06:37 PM

I am thinking of a tip and trick for tomorrow's newsletter and came across this. Is it accurate???

Google Pagerank formula
It looks scary for non math's people.

First let me explain what the damping factor is. The damping factor is the amount of your PR which you can actually pass on when you vote / link to another site. The damping factor is widely known to be .85, this is a little less then the linking pages own PR.

PR(A) = (1-d) + d(PR(t1)/C(t1) + ... + PR(tn)/C(tn))

In layman's terms PR(A) is the Pagerank boost your page A will get after being linked from someone else's site (t1). PR(t1) is the pagerank of the page which links to you and C(t1) is the amount of total links that (t1) has. It is important to know that a pages voting power is only .85 of that pages actual PR and this voting power gets spread out evenly between all sites it links to.

Imagine ABC.COM was linked by XYZ.COM's link page which had a PR of 4 and 9 other links, here's how the formula should look like:

PR(ABC) = (1-.85) + .85*(4/10)
PR(ABC) = .15 + .85*(.4)
PR(ABC) = .15 + .34
PR(ABC) = .49
To sum up my site would get an injection of .49 PR after being linked from a page with a PR of four and 9 other links.

Let's say I was linked from a site with a PR of 8, double the previous example's amount, which had 15 other links, a total of 16 outbound links, my boost would be:

PR(ABC) = (1-.85) +.85*(8/16)
PR(ABC) = .15 + .85(.5)
PR(ABC) = .15 + .425
PR(ABC) = .575

The above two worked examples show that not only is the PR of the linking page important but what is also important is how many other sites are also linked to from that page.

2004-06-21, 06:37 PM	#1
Jim Banned Join Date: Aug 2003 Location: Mohawk, New York Posts: 19,477	Take a look at this I am thinking of a tip and trick for tomorrow's newsletter and came across this. Is it accurate??? Google Pagerank formula It looks scary for non math's people. First let me explain what the damping factor is. The damping factor is the amount of your PR which you can actually pass on when you vote / link to another site. The damping factor is widely known to be .85, this is a little less then the linking pages own PR. PR(A) = (1-d) + d(PR(t1)/C(t1) + ... + PR(tn)/C(tn)) In layman's terms PR(A) is the Pagerank boost your page A will get after being linked from someone else's site (t1). PR(t1) is the pagerank of the page which links to you and C(t1) is the amount of total links that (t1) has. It is important to know that a pages voting power is only .85 of that pages actual PR and this voting power gets spread out evenly between all sites it links to. Imagine ABC.COM was linked by XYZ.COM's link page which had a PR of 4 and 9 other links, here's how the formula should look like: PR(ABC) = (1-.85) + .85(4/10) PR(ABC) = .15 + .85(.4) PR(ABC) = .15 + .34 PR(ABC) = .49 To sum up my site would get an injection of .49 PR after being linked from a page with a PR of four and 9 other links. Let's say I was linked from a site with a PR of 8, double the previous example's amount, which had 15 other links, a total of 16 outbound links, my boost would be: PR(ABC) = (1-.85) +.85*(8/16) PR(ABC) = .15 + .85(.5) PR(ABC) = .15 + .425 PR(ABC) = .575 The above two worked examples show that not only is the PR of the linking page important but what is also important is how many other sites are also linked to from that page.