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Old 2007-05-20, 05:20   #1
jinydu
 
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Dec 2003
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Default Homework: Please Don't Delete Until Tuesday

\int_{\gamma -}(xdy-ydx)=-\int_{a}^{b}(x(b+a-t)y'(b+a-t)-y(b+a-t)x'(b+a-t))dt}

(Sorry, this time I might not get the chance to print this out and show it to my teaching assistant until it's too late)
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Old 2007-05-20, 20:26   #2
jasong
 
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"Jason Goatcher"
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Maybe we should have a forum for things where people need to prove they did something before a certain date, or maybe someone wants to post an online will, etc., or maybe just a simple place for people to place notes for themselves.

Last fiddled with by jasong on 2007-05-20 at 20:27
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Old 2007-05-20, 21:51   #3
gribozavr
 
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There is a free timestamping service which can really (cryptographically) prove that the information was received at the specified time:

http://www.itconsult.co.uk/stamper/stampinf.htm
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Old 2007-05-21, 11:27   #4
jasong
 
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I was not aware of that.

Thank you.
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