Saturday, October 28, 2006

Beth's question and a very brief tutorial.

There are little blogger buttons on the upper left and lower right of this page. They don't look exactly the same, but they both take you to a page where you can create new posts. That way, if you have a question, you can begin a new post and people can respond to your question with comments under that post. I suppose I should have said so earlier. Here's Beth's question:

Ok so I don't really know how this works but I'm hoping this gets posted...I was trying to work on the math homework and kept getting stuck on part (d) of each question (since each question asks us to do the same thing for different functions) anyways....what is a sufficient second order condition? and how can you tell if the choices maximize the function locally or globally? thanks


At 8:19 PM, October 28, 2006, Blogger Henry said...

I have'nt done 314 yet but isn't this what she was talking about at the end of class Thursday. That is:

The sufficient condition for a local max is that the Hessian negative definite at the point in question.

For a global max its neg. def. for all 'x'.

I'm guessing that's what it must be.

At 8:23 PM, October 28, 2006, Blogger Henry said...

When you post comments if the number of comments under the post does not change you can go to the dashboard (the place where you create new posts) hit the status button and choose 'republish entire blog' and the number will be updated (you don't have to do this but it might take a while for the comment number to change otherwise). Though I'm pretty sure that even if you don't do this the comment will be visible if people look at the comments. Contrarily if you're checking to see if anyone left a comment on a post, you might want to check to make sure there isn't a new comment that just has'nt been counted.


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