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 jinydu 2007-05-20 05:20

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)

 jasong 2007-05-20 20:26

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.

 gribozavr 2007-05-20 21:51

There is a free timestamping service which can really (cryptographically) prove that the information was received at the specified time:

[url]http://www.itconsult.co.uk/stamper/stampinf.htm[/url]

 jasong 2007-05-21 11:27

I was not aware of that.

Thank you.

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