Sunday, May 3, 2020

Interlude 2

On the brighter note, here are books that some of our participants might find interesting and that Springer kindly allows you to download as a part of covid-19 "relieve":











    For more, see here






    Tuesday, April 28, 2020

    Origami

    30 April 2020

    William Holt

    Origami, math between the sheets (of paper)

    Recording (59 min).

    William goes over a number of things, which include his method of folding paper into n equal sections for arbitrary n.  


    Sunday, April 26, 2020

    Interlude


    Two items:


    The text Christian Rose mentioned (and currently reads) can be downloaded here.   (It contains a nice chapter on math of lattices.)    See also the lectures recorded at Oxford Thanks, Christian.


    The lectures on Knot Theory started.  Here are recordings of the first four:
    Lecture 1 (Roger Fenn)
    Lecture 2 (Louis Kauffman)
    Lecture 3  (Roger Fenn)
    Lecture 4  (Louis Kauffman)
    Lecture 5  (Roger Fenn, 1 May)

    Yous probably remember Louis from his visits at Carbondale.


    Monday, April 20, 2020

    negative mass

    Click on the image to see details

    23 April 2020

    Moses Gaither-Ganim

    Minus matter: the possibility of negative mass

    [Recording] - the first few minutes are missing, but can easily be reconstructed from the whiteboard. 


    Monday, April 13, 2020

    Origami geometry

    16 April 2020

    William Holt

    Pentagons from paper, development of division in ancient art

      <<< click on the image to enlarge




    Please prepare at least 5 sheets of letter size paper for folding. 

    Here is the recording of the meeting.




    Wednesday, April 8, 2020

    Fibonacci numbers

    9 Apr 2020

    Jerzy (Jurek) Kocik

    Fibonacci sequence and Ford circles


    For more, see  arXiv:2003.00852





    Friday, February 28, 2020

    Can get it here
    5 Feb 2020

    Don Redmond

    When are Rectangles Squares?

    Thursday, February 27, 2020

    27 Feb 2020

    Kalpa Madhawa

    Quaternionic eigenvalues

    Thursday, February 20, 2020

    From Arts Bathsheba
    20 Feb 2020

    Duston Wetzel

    On gyroid


    Gyroid was discovered by our own Alan Schoen and is enjoing an increasing general popularity in sience and in in general math culture


    Tuesday, February 4, 2020

    Ford and scattering



    6 and 13 Feb 2020 

    K.V Shajesh

    Rayleigh scattering off Ford circles


    Saturday, January 18, 2020

    Math from physics

    23 and 30 Jan 2020

    Philip Feinsilver

    Eigenvectors from eigenvalues

    >> Relevant paper on Arxiv
    >> Quanta Magazine on this subject

      <<  see the original image

      Philip's presentation  (NEW)
     plus this page.

    Thursday, November 14, 2019

    Symmetry


    21 November and
    and 5 December 2019

    Thushari Jayasekera

    Symmetry in Materials Physics

    ← click to view details.