17 Feb and 3 Mar
K. V. Shajesh
Wednesday, February 16, 2022
Monday, January 24, 2022
Spring 2022
27 Jan and 10 Feb
(to be continued...)
Mohammad Sayeh
Associative memory
Via zoom; the link is given above.
Image from https://www.hrl.com/news/
2019/05/30/hrls-sparse-associative-memory
-emulates-a-major-function-of-the-brain
Thursday, May 20, 2021
Wednesday, April 28, 2021
SPRING 2021
29 Apr 2021
Jerzy Kocik
Lie algebra in graphical language
for pedestrians
(with a tinge of category theory)
[video]
Remark on summation convetion: When an expression has a repeated index, once as a superscript and once as a subscript, the summation over this index is implied, for instance $$A^j_iv^i \equiv \sum_iA^j_iv^i$$ I forgot to mention it at the beginning of the talk.
Tuesday, April 20, 2021
SPRING 2021
22 Apr 2021
Derek Hostalek
Blockchain Math without Speculation
[Video]
https://bitcoin.org/bitcoin.
https://www.egr.msu.edu/~
https://www.blockchain.com
Wednesday, April 14, 2021
Wednesday, March 31, 2021
SPRING 2021
[1 April seminar is cancelled]
8 April 2021
Borzu Toloui
The Descriptor Picture of Quantum Mechanics
(Part 3 -- conclusions)
Video 3 (starts at 20th minute)
[2 pm, zoom link at the top]
Borzu suggests these papers for further insights:
- https://arxiv.org/pdf/quant-ph/9906007.pdf
- https://arxiv.org/pdf/quant-ph/0104033.pdf
- https://arxiv.org/pdf/2012.11189.pdf
- https://arxiv.org/pdf/2001.09646.pdf
- https://arxiv.org/pdf/quant-ph/0609085.pdf
- https://arxiv.org/pdf/1109.6223.pdf
Wednesday, March 17, 2021
SPRING 2021
18 and 25 March 2021
Borzu Toloui
The Descriptor Picture of Quantum Mechanics
(Part1 and Part 2)
Here is the link to a relevant paper:
[For basics on quantum computing see Lomonaco's "Roseta Stone"]
Wednesday, March 10, 2021
Spring 2021
11 Mar 2021
Revival of the seminar!
A general chat + a possible talk:
Jerzy Kocik
On a certain discrete matrix group
Sunday, December 6, 2020
Autumn 2020
Our seminar takes a break till the next semester (January). Thank you everybody for participating! Please use this space for sharing comments and interesting or relevant items. Use comments or send me a material to be posted.
Happy physical, spiritual, and mental transition to 2021!
From now on we shall use a permanent zoom address; see below.
Note that the link is also displayed in the right margin column.
Thursdays 2pm for seminar, any time for a chat:
Meeting ID: 923 4934 3807, Passcode: 426631
You may also join by Skype for Business.
Saturday, November 14, 2020
Autumn 2020
19 Nov and 3 Dec 2020
K. V. Shajesh
Casimir Effect
Thursdays 2pm for seminar, any time for a chat:
Meeting ID: 923 4934 3807, Passcode: 426631
You may also join by Skype for Business.
Wednesday, November 4, 2020
Autumn 2020
5 and 12 Nov 2020
Jerzy Kocik
Integrality implies super-integrality and hyper-integrality
Part 2: Disks as vectors in Minkowski space, inversions, and conclusion of the proof.
See Apolloniana for some background
Recording of Part 1
Recording of Part 2
Part 1: Here are two warm-up problems (related, but not central):
Suppose 4 integers do not have a common factor, gcd(a,b,c,d)=1, and satisfy quadratic equation $$(a+b+c+d)^2 = 2\, (a^2+b^2+c^2+d^2)$$ Show that:
1. Exactly two of them are odd (easy)
2. The sum of any two can be written as a sum of two squares (a challenge)
Examples of solutions to the quadratic equation: (2,3,6,23), (2,3,15,38), (3,6, 14 47), (0,1,4,9), (11,14,15,89),...
Part 1: Here are two warm-up problems (related, but not central):
Suppose 4 integers do not have a common factor, gcd(a,b,c,d)=1, and satisfy quadratic equation $$(a+b+c+d)^2 = 2\, (a^2+b^2+c^2+d^2)$$ Show that:
1. Exactly two of them are odd (easy)
2. The sum of any two can be written as a sum of two squares (a challenge)
Examples of solutions to the quadratic equation: (2,3,6,23), (2,3,15,38), (3,6, 14 47), (0,1,4,9), (11,14,15,89),...
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