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* [[Rota's conjecture|Polymath12]]: proving Rota's conjecture.  Proposed Feb 28, 2017.
* [[Rota's conjecture|Polymath12]]: proving Rota's conjecture.  Proposed Feb 28, 2017.
* [[Intransitive dice|Polymath13]]: Intransitive dice.  Proposed Apr 28, 2017.
* [[Intransitive dice|Polymath13]]: Intransitive dice.  Proposed Apr 28, 2017.
* [[linear norm|Polymath14]]: Classifying homogeneous norms on groups.  Initiated Dec 16, 2017; solved Dec 21, 2017.  Research results have now been published.
* [[linear norm|Polymath14]]: Classifying homogeneous norms on groups.  Initiated Dec 16, 2017.  Results submitted, Jan 11, 2018.
* [[De_Bruijn-Newman constant|Polymath15]]: Upper bounding the de Bruin-Newman constant.  Proposed, Jan 24 2018; launched Jan 27 2018.
* [[De_Bruijn-Newman constant|Polymath15]]: Upper bounding the de Bruin-Newman constant.  Proposed, Jan 24 2018; launched Jan 27 2018.
* [[Hadwiger-Nelson problem|Polymath16]]: Simplifying the lower bound proof for the Hadwiger-Nelson problem.  Proposed, Apr 10, 2018; launched, Apr 14, 2018.
* [[Hadwiger-Nelson problem|Polymath16]]: Simplifying the lower bound proof for the Hadwiger-Nelson problem.  Proposed, Apr 10, 2018; launched, Apr 14, 2018.

Revision as of 10:09, 27 November 2018

This is the wiki for polymath projects - massively collaborative online mathematical projects. The idea of such projects originated in Tim Gowers' blog post Is massively collaborative mathematics possible?

Many polymath projects will be proposed, planned, and run at This Blog.

A Polymath logo is being trialled. If you have more suggestions, please add them to the logo page, or add to the discussion at Talk:logo.

The wiki is currently locked down due to a major influx of spam (July 29, 2013). Please email mn@michaelnielsen.org if you'd like an account set up, and I'll do my best to reply quickly.

Existing polymath projects

  • Polymath1: New proofs and bounds for the density Hales-Jewett theorem. Initiated Feb 1, 2009; research results have now been published.
  • Polymath2: Must an “explicitly defined” Banach space contain [math]\displaystyle{ c_0 }[/math] or [math]\displaystyle{ l_p }[/math]? Initiated Feb 17, 2009; attempts to relaunch via wiki, June 9 2010.
  • Mini-polymath1: Solving Problem 6 of the 2009 International Mathematical Olympiad. Initiated July 20, 2009; five proofs obtained so far.
  • Polymath3. The polynomial Hirsch conjecture. Proposed July 17, 2009; launched, September 30, 2010.
  • Polymath4: A deterministic way to find primes. Proposed July 27, 2009; launched Aug 9, 2009. Research results have now been published.
  • Polymath5: The Erdős discrepancy problem. Proposed Jan 10, 2010; launched Jan 19, 2010. Activity ceased by the end of 2012, but results from the project were used to solve the problem in 2015.
  • Mini-polymath2: Solving Problem 5 the 2010 International Mathematical Olympiad. Proposed Jun 12, 2010; launched and solved, Jul 8 2010.
  • Polymath6: Improving the bounds for Roth's theorem. Proposed Feb 5, 2011.
  • Mini-polymath3: Solving a problem from the 2011 International Mathematical Olympiad. Proposed Jun 9, 2011; launched and solved, Jul 19, 2011.
  • Mini-polymath4: Solving a problem from the 2012 International Mathematical Olympiad. Proposed, Jun 3, 2012; launched, July 12 2012.
  • Polymath7: Establishing the Hot Spots conjecture for acute-angled triangles. Proposed, May 31st, 2012; launched, Jun 8, 2012.
  • Polymath8: Improving the bounds for small gaps between primes. Proposed, June 4, 2013; launched, June 4, 2013. Research results have now been published.
  • Polymath9: exploring Borel determinacy-based methods for giving complexity bounds. Proposed, Oct 24, 2013; launched, Nov 3, 2013.
  • Polymath10: improving the bounds for the Erdos-Rado sunflower lemma. Launched, Nov 2, 2015.
  • Polymath11: proving Frankl's union-closed conjecture. Proposed Jan 21, 2016; launched Jan 29, 2016. Concluded, Jan 17, 2017.
  • Polymath12: proving Rota's conjecture. Proposed Feb 28, 2017.
  • Polymath13: Intransitive dice. Proposed Apr 28, 2017.
  • Polymath14: Classifying homogeneous norms on groups. Initiated Dec 16, 2017. Results submitted, Jan 11, 2018.
  • Polymath15: Upper bounding the de Bruin-Newman constant. Proposed, Jan 24 2018; launched Jan 27 2018.
  • Polymath16: Simplifying the lower bound proof for the Hadwiger-Nelson problem. Proposed, Apr 10, 2018; launched, Apr 14, 2018.

Polymath-like projects

Proposed polymath projects


A (partial) list of proposed projects can be found here.

If you have a tentative proposal for a polymath project, you can either make a post on it on your own blog, or place it here.

Discussions about polymath

Additional links are very welcome.

Other links

Note on anonymous editing

To help combat spam, anonymous editing has been disabled, and a captcha system added to hinder automated account creation. If this is causing problems, please email mn@michaelnielsen.org.

Note on image uploads

Image uploads have been disabled, as they were causing problems with spam. If you'd like to upload an image, please email mn@michaelnielsen.org

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