Joined July 2018
- Tweets 50
- Following 33
- Followers 174
- Likes 26
9 Photos and videos
Bohemian Matrices retweeted
4 Feb 2022
ALT https://github.com/JeffIrwin/bomat/blob/main/examples/bomat-5d-z--2022-02-03.json
ALT https://github.com/JeffIrwin/bomat/blob/main/examples/bomat-4h--2022-02-03.json
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30 Jun 2021
For anyone curious about the rounding error in the skew-symmetric tridiagonal matrices eigenvalue plot. This shows a close up of the rounding error (a different family of matrices but the same principle applies).
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30 Jun 2021
The red circles have radii of eps^(1/m) (machine epsilon) giving the expected rounding error for eigenvalues of multiplicity m in double precision with m=15 for the outermost circle.
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30 Jun 2021
The family used here is 20x20 "anti-tridiagonal" matrices (an upside-down tridiagonal matrix) with population {-1, 0, 1}. 100 million matrices were sampled.
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Bohemian Matrices retweeted
29 Jun 2021
Today's @BohemianMatrix computation, by my student Aaron Asner: the eigenvalues of all 31 by 31 skew-symmetric tridiagonal matrices with population 1 and i. Over a billion matrices; computation in parallel on a 64 core machine took 85 hours. The center rose is rounding error!
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Bohemian Matrices retweeted
6 Jun 2021
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28 Jan 2021
Just in time for February, the 2021 Bohemian Matrices calendar is ready thanks to @corless_rob. Download your copy at bohemianmatrices.com.
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Bohemian Matrices retweeted
19 Aug 2020
The work (with @stevejtrettel and Kate Stange) I have been trailing for a while on Algebraic number starscapes (the patterns in polynomial roots) is now up on the arXiv; arxiv.org/abs/2008.07655 It is a math paper, but the images should be accessible to all!
ALT Roots of septic polynomials
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Bohemian Matrices retweeted
4 Jul 2020
Happy to announce that our Generalized Standard Triples paper (a part of the @BohemianMatrix
Project) has been revised. Thanks @LeiliRafiee and @euniceyschan
and to @tisseurf
for the feedback! arxiv.org/abs/1805.04488
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Bohemian Matrices retweeted
20 Dec 2019
"Electric Bohemian 13" my last @BohemianMatrix image done @NewtonInstitute for 2019. Thanks @maplesoft and @3j0hn for the Color Tools package.
ALT Eigenvalue density plot for all 13 by 13 complex symmetric tridiagonal matrices with zero main diagonal and population 1, exp(I*pi/4), and its conjugate. Colorized to make art. Well, perhaps it's art.
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Bohemian Matrices retweeted
12 Dec 2019
Ok I'm happy with this @BohemianMatrix picture. Merry Newtonmas! Come to my @NewtonInstitute masterclass to learn how to use Maple to make your own. @maplesoft
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Bohemian Matrices retweeted
10 Dec 2019
Ok enough about other people's talks. I'm giving two: one Thursday, a general introduction to Maple @maplesoft and one Friday where I will show how to make @BohemianMatrix pictures like this in Maple.
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Bohemian Matrices retweeted
2 Dec 2019
In my upcoming (Dec 12/13) masterclass in Maple @NewtonInstitute, participants will learn how to make @BohemianMatrix pictures like this. This is hybrid symbolic numeric computation. @maplesoft [5th roots of unity, 7 by 7 symmetric tridiagonal 0 main diagonal]
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Bohemian Matrices retweeted
28 Nov 2019
Currently designing my masterclass in Maple for #NewtonCAT219 at @NewtonInstitute next month. Naturally, @BohemianMatrix gets a showing. I think people may enjoy building their own. @maplesoft @westernuAPMaths @rotmanphilo
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Bohemian Matrices retweeted
23 Aug 2019
Congratulations to Dr @euniceyschan !! The newest PhD in @westernuAPMaths and @rotmanphilo ! Thanks to @tisseurf for being the external examiner :)
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Bohemian Matrices retweeted
19 Jul 2019
Cleve explaining the Moler matrix at @BohemianMatrix minisymposium at @ICIAM2019
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Bohemian Matrices retweeted
19 Jul 2019
Gil Strang going strong @ICIAM2019 at our @BohemianMatrix minisymposium meeting some old and new @westernuAPMaths friends!
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Bohemian Matrices retweeted
19 Jul 2019
Here is @euniceyschan giving her talk at the @BohemianMatrix minisymposium @westernuAPMaths @rotmanphilo
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Bohemian Matrices retweeted
16 Jul 2019
MATLAB's creator Cleve Moler will be taking part at the minisymposium on "Bohemian Matrices" at @ICIAM2019 on Friday 19. Do not miss it! @MathWorks #weloveMATLAB
SPOILER AHEAD 👇🧐⚠️
blogs.mathworks.com/cleve/20…
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