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From Benson Margulies <bimargul...@gmail.com>
Subject Re: PageRank
Date Tue, 31 May 2011 15:31:46 GMT
Well, we can go send that link to legal-discuss@apache.org and see
what they say.


On Tue, May 31, 2011 at 10:57 AM, Sebastian Schelter <ssc@apache.org> wrote:
> I'm a little confused now :) What do you mean by "real knowledge"? I found a
> link to the patent when reading the wikipedia page about PageRank, however
> as I'm not a lawyer, I don't consider myself capable of judging the
> situation.
>
> --sebastian
>
> On 31.05.2011 16:41, Benson Margulies wrote:
>>
>> Let me clarify this:
>>
>> No one is obligated to do patent research. If you have real knowledge
>> of a patent infringement in a proposed contribution, you must disclose
>> it. If you have no real knowledge, you need not go looking for it.
>>
>> On Tue, May 31, 2011 at 10:18 AM, Dhruv Kumar<dkumar@ecs.umass.edu>
>>  wrote:
>>>
>>> Jimmy Lin's Cloud 9 Map Reduce library also includes an implementation of
>>> Page Rank as an example:
>>>
>>> http://www.umiacs.umd.edu/~jimmylin/cloud9/docs/
>>>
>>> On Tue, May 31, 2011 at 9:10 AM, Sebastian Schelter<ssc@apache.org>
>>>  wrote:
>>>
>>>> Thank you very much for the advice, I'll try to contact Stanford then.
>>>>
>>>> --sebastian
>>>>
>>>>
>>>> On 31.05.2011 14:53, Benson Margulies wrote:
>>>>
>>>>> As a contributor, you could submit a patch noting the existence of the
>>>>> patent, *If you know that a patent reads on it*. As a PMC member, I'm
>>>>> advised by legal-discuss@ to reject the patch, unless you can get a
>>>>> grant from Stanford.
>>>>>
>>>>> However, 'having heard' is not the same thing as *knowing*. A vague
>>>>> rumor does not trigger any of this.
>>>>>
>>>>> The fact that CMU has chosen to distribute an implementation is
>>>>> neither here nor there.
>>>>>
>>>>>
>>>>>
>>>>> On Tue, May 31, 2011 at 8:25 AM, Sebastian Schelter<ssc@apache.org>
>>>>>  wrote:
>>>>>
>>>>>> Hello everyone,
>>>>>>
>>>>>> I have a question regarding legal issues.
>>>>>>
>>>>>> I have one of my students implement PageRank in MapReduce, would
it be
>>>>>> possible to contribute this to Mahout or are there any legal issues
>>>>>> prohibiting this?
>>>>>>
>>>>>> I read that Stanford is holding a patent on PageRank but I've seen
a
>>>>>> PageRank implementation already included in the Pegasus Framework
from
>>>>>> Carnegie Mellon University which is Apache licensed.
>>>>>>
>>>>>> Can someone help here with advice?
>>>>>>
>>>>>> --sebastian
>>>>>>
>>>>>>
>>>>
>>>
>
>

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