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### Messages - Victor Ivrii

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1
##### Chapter 6 / Re: Laplace Equation Section 6.4
« on: March 21, 2020, 09:55:28 AM »
It means that $\Theta$ is $2\pi$-periodic.

2
##### Chapter 3 / Re: 3.1 question 13 typo
« on: March 16, 2020, 10:08:38 AM »
Thanks. Fixed

3
##### Chapter 5 / Re: Section 5.1, 5.2 - ok to consider delta distribution?
« on: March 10, 2020, 08:35:56 AM »
Then you need to explain more or less rigorously, what is $\delta$-distribution and how Fourier transform is defined for it. Yes, online textbook covers this topic and much more than your physics class but in more advanced chapters, we do not cover

4
##### Chapter 2 / Re: 2.4
« on: March 07, 2020, 08:08:06 AM »
Either investigate the power series or to use theorem that if $f$ is analytic in some disc $D(z_0,r)$, then the expansion at its center $z_0$ converges in this disc.

5
##### Chapter 4 / Re: 4.1 typos
« on: March 07, 2020, 08:06:06 AM »
You seem to have a different texbook than posted

6
##### Chapter 2 / Re: S2.4 online textbook
« on: February 21, 2020, 05:09:16 PM »
The error was done before. Now it fixed. Thanks

7
##### Chapter 2 / Re: Section 2.6 Problem 2
« on: February 19, 2020, 01:11:02 PM »
Pst problem or provide a link to it

8
##### Chapter 3 / Re: Section3.2
« on: February 14, 2020, 12:51:46 AM »
Sometimes, for some functions there are shortcuts, but generally not

9
##### Chapter 2 / Re: 2.2 home assignment question 18
« on: February 12, 2020, 03:12:59 PM »
Fixed. Thanks!

10
##### Chapter 2 / Re: 2.2 home assignment question 18
« on: February 11, 2020, 07:38:13 AM »

11
##### Chapter 2 / Re: 2.3 question 3
« on: February 11, 2020, 07:37:38 AM »
Your answer is correct ($-\pi i$).

If you see discrepancies, report them

12
##### Chapter 2 / Re: 2.3 textbook
« on: February 09, 2020, 06:54:26 PM »
Yes, wrong sign  in the middle (should be $\drac{1}{2i}=-\dfrac{i}{2}$) but the final result is correct

13
##### Chapter 2 / Re: Section 2.6
« on: February 03, 2020, 08:18:07 AM »
Since $u$ is defined for $x<0$ and for $x>0$, you calculate limits from the left ($u|_{x=-0}$) and from the right ($u|_{x=+0}$). This is a standard notation

14
##### Quiz 2 / Re: Quiz2 TUT5101
« on: January 31, 2020, 10:49:26 PM »
In the tsecond/third lines should be $dt$, ..., not $\partial t$,...

15
##### Quiz 2 / Re: TUT5101 QUIZ2
« on: January 31, 2020, 09:05:11 AM »
You cannot use LH out of the box for complex variables. You need to consider $z=re^{i\theta}$ and consider $\bigl|\dfrac{\operatorname{Log}(z)}{z}\bigr|$ ...

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