Superpermutators

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This group is for anyone who is interested in the minimal superpermutation problem. Please do sign up if you’re interested.

We have a GitHub repository at https://github.com/superpermutators/superperm. Let me know if you’d like to be added to the organisation.

Background reading:

Nathaniel Johnston’s blog (1, 2, 3) and paper,
Robin Houston’s paper,
Greg Egan’s web page.
Article by Erica Klarreich in Quanta magazine.

Videos:

Numberphile (Jan 2018)
Matt Parker (Jan 2019)

0 selected

Robin Houston

12/8/23

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There have been some attempts to spam this group recently, and so I am being stricter with requests

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12/8/23

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12/1/23

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Amada Buerstatte

11/30/23

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11/30/23

Amada Buerstatte

11/30/23

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11/30/23

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11/30/23

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11/30/23

Amada Buerstatte

11/30/23

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11/30/23

Amada Buerstatte

11/30/23

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11/30/23

Randy Olsen

8/11/23

Superpermutation song

To set expectations properly: This isn't a "reveal" for some new development. I merely

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Superpermutation song

To set expectations properly: This isn't a "reveal" for some new development. I merely

8/11/23

Robin Houston

7/28/23

Stitching Superpermutations

Yesterday, at the Bridges conference, Emily Dennett gave a talk on the subject _Stitching

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Stitching Superpermutations

Yesterday, at the Bridges conference, Emily Dennett gave a talk on the subject _Stitching

7/28/23

Jay Pantone, … Кирилл Фролов3

3/11/23

Shutting down the distributed superpermutation search on Friday March 10

Will this server be shut down too? https://www.gregegan.net/SCIENCE/Superpermutations/

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Shutting down the distributed superpermutation search on Friday March 10

Will this server be shut down too? https://www.gregegan.net/SCIENCE/Superpermutations/

3/11/23

Кирилл Фролов

2/26/23

FastDCM problem

I have had a problem running FastDCM compiled with cuda 12 on windows. It crashed when i ran it. When

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FastDCM problem

I have had a problem running FastDCM compiled with cuda 12 on windows. It crashed when i ran it. When

2/26/23

Joshua A

9/9/22

A possibility, that if true would suggest the minimum digit count for n=8 is less than the standard 46,205

I would like to introduce myself first: that I cannot understand all that mumbo jumbo that proves the

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A possibility, that if true would suggest the minimum digit count for n=8 is less than the standard 46,205

I would like to introduce myself first: that I cannot understand all that mumbo jumbo that proves the

9/9/22

Mister Teacher, … Randy Olsen6

11/22/21

How many standard superpermutations are there length 872 for n=6?

I've checked all 42288 of the length 872 n=6 superpermutations in this "treelike"

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How many standard superpermutations are there length 872 for n=6?

I've checked all 42288 of the length 872 n=6 superpermutations in this "treelike"

11/22/21

Ryan Holbrook

11/17/21

Kaggle Superpermutation Competition

Hey everyone, I'm a data scientist at Kaggle, a community platform for data science and machine

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Kaggle Superpermutation Competition

Hey everyone, I'm a data scientist at Kaggle, a community platform for data science and machine

11/17/21

Randy Olsen

10/31/21

Fun with number base systems

One Dr. Maximilian F. Hasler beat me to this, and probably others as well, yet at the same time I was

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Fun with number base systems

One Dr. Maximilian F. Hasler beat me to this, and probably others as well, yet at the same time I was

10/31/21

joseduardo...@gmail.com, Jay Pantone2

8/30/21

Reached w=122

Hi everyone, I have finally updated the timing table for w=121. It took longer than normal because I

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Reached w=122

Hi everyone, I have finally updated the timing table for w=121. It took longer than normal because I

8/30/21

theReal_JamesGrime, Miles Gould2

8/27/21

question

Hi Marco! (I'm assuming you're not the real James Grime...) I'm not sure exactly what you

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question

Hi Marco! (I'm assuming you're not the real James Grime...) I'm not sure exactly what you

8/27/21

Math lo, Miles Gould2

8/3/21

Need help with my paper on Superpermutations

Hi! It looks like you've rediscovered the recursive algorithm for constructing superpermutations,

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Need help with my paper on Superpermutations

Hi! It looks like you've rediscovered the recursive algorithm for constructing superpermutations,

8/3/21

Kyle Gullion, Miles Gould3

6/9/21

Encoding superpermutations

Disabling the physics engine after doing the first layout will allow a new encoding to be copy and

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Encoding superpermutations

Disabling the physics engine after doing the first layout will allow a new encoding to be copy and

6/9/21

Jay Pantone3

5/19/21

Superpermutation Distributed Search - Network Issues

Hi everyone, Our central server for the superpermutation search is now online and stable again. Thank

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Superpermutation Distributed Search - Network Issues

Hi everyone, Our central server for the superpermutation search is now online and stable again. Thank

5/19/21

Nick Art

5/15/21

Would computing things on the ETH Euler system help?

After lurking in the shadows a bit and a few interesting thoughts and conversations I had about the

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Would computing things on the ETH Euler system help?

After lurking in the shadows a bit and a few interesting thoughts and conversations I had about the

5/15/21

Jay Pantone2

4/16/21

Superpermutation Distributed Search - Maintenance Tomorrow

Hi everyone, Thanks for your patience, things should be up and running now. Please let me know if you

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Superpermutation Distributed Search - Maintenance Tomorrow

Hi everyone, Thanks for your patience, things should be up and running now. Please let me know if you

4/16/21

Randy Olsen

4/10/21

Key relation?

This seems to hold: This is just me of course writing out as elegantly as I know how the connection

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Key relation?

This seems to hold: This is just me of course writing out as elegantly as I know how the connection

4/10/21

danba...@googlemail.com, Greg Egan3

3/21/21

Intro For Graphs

Hi Greg, Thank you for the quick reply. > If you're talking about drawing a superpermutation

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Intro For Graphs

Hi Greg, Thank you for the quick reply. > If you're talking about drawing a superpermutation

3/21/21

Randy Olsen

3/20/21

Probable feature of an n = 8 superpermutation beating the upper bound

In Robin Houston's n = 6 superpermutation of length 872 I've been studying (the particular

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Probable feature of an n = 8 superpermutation beating the upper bound

In Robin Houston's n = 6 superpermutation of length 872 I've been studying (the particular

3/20/21

Jonathon Hazelton, Robin Houston2

3/7/21

The Superpermutations of 5 things

Sure! Here they are: https://github.com/superpermutators/superperm/blob/master/superpermutations/5/

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The Superpermutations of 5 things

Sure! Here they are: https://github.com/superpermutators/superperm/blob/master/superpermutations/5/

3/7/21

Randy Olsen, … phil.and...@gmail.com6

3/4/21

Pattern in the "negative space"

A second round of the minimal superpermutation negative space stepping away from A288780 starts at n

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Pattern in the "negative space"

A second round of the minimal superpermutation negative space stepping away from A288780 starts at n

3/4/21

Cole Fritsch, Tom S13

2/28/21

872 is Minimal for Superpermutations on n=6

In trying to fix Lemma 5.9, I realized that the current way I am proving Proposition 4.1 gets very

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872 is Minimal for Superpermutations on n=6

In trying to fix Lemma 5.9, I realized that the current way I am proving Proposition 4.1 gets very

2/28/21

Cole Fritsch2

1/23/21

Conditions on the Possibility of 871-Length Superpermutations on n=6

If I am understanding the concept of kernels and extensions correctly, then extensions are

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Conditions on the Possibility of 871-Length Superpermutations on n=6

If I am understanding the concept of kernels and extensions correctly, then extensions are

1/23/21

eng...@gmail.com

1/15/21

Paper on superpermutations and variations

Last year, Vince Vatter and I wrote a paper surveying results on superpermutations and other variants

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Paper on superpermutations and variations

Last year, Vince Vatter and I wrote a paper surveying results on superpermutations and other variants

1/15/21