LFD Book Forum Problem 3.6(a)
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#1
07-12-2017, 05:41 PM
 tikenn Junior Member Join Date: Jun 2017 Posts: 3
Problem 3.6(a)

I think this is similar to the answer provided for problem 3.5, but I am having a difficult time understanding why, in Problem 3.4, the error is continuous and differentiable at the point . I have the three cases looking like this so far:

in which I believe
in which I believe
in which I believe

These cases would make non-differentiable because the derivatives from the left and right are different. Am I evaluating the error from the book wrong --> ?
#2
07-15-2017, 02:27 PM
 htlin NTU Join Date: Aug 2009 Location: Taipei, Taiwan Posts: 558
Re: Problem 3.6(a)

Are the derivatives on the two sides really different? :-)
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#3
07-16-2017, 12:36 AM
 tikenn Junior Member Join Date: Jun 2017 Posts: 3
Re: Problem 3.6(a)

I apologize, I realize I made an error in labeling the problem that my question refers to. My original question actually refers to Problem 3.4a.

Quote:
 Originally Posted by htlin Are the derivatives on the two sides really different? :-)
Anyway, thank you for the hint! My confusion was with how problem 3.5 and problem 3.4 were so different, but I forgot to evaluate the gradients all the way through for both. Thanks!
#4
08-24-2017, 05:05 AM
 subbupd Junior Member Join Date: Aug 2017 Location: Singapore Posts: 7
Re: Problem 3.6(a)

Correct - evaluating the gradients would work!

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