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1. • CommentRowNumber1.
   • CommentAuthorUrs
   • CommentTimeJan 24th 2020
   • PermaLink
   Author: Urs
   Format: MarkdownItexStarting something. Not done yet, but need to save. <a href="https://ncatlab.org/nlab/revision/large+1%2FN+limit/1">v1</a>, <a href="https://ncatlab.org/nlab/show/large+1%2FN+limit">current</a>

   Starting something. Not done yet, but need to save.

   v1, current

2. • CommentRowNumber2.
   • CommentAuthorUrs
   • CommentTimeJan 24th 2020
   • PermaLink
   Author: Urs
   Format: MarkdownItexnow some minimum in place. <a href="https://ncatlab.org/nlab/revision/large+1%2FN+limit/1">v1</a>, <a href="https://ncatlab.org/nlab/show/large+1%2FN+limit">current</a>

   now some minimum in place.

   v1, current

3. • CommentRowNumber3.
   • CommentAuthorDavid_Corfield
   • CommentTimeJan 24th 2020
   • PermaLink
   Author: David_Corfield
   Format: MarkdownItexI was just reminded of John Baez years ago [describing](http://math.ucr.edu/home/baez/week92.html) Bar-Natan's paper on the four-color problem and the relation between $SU(2)$ and $SU(n)$ gauge theory. Bar-Natan's paper is [here](https://arxiv.org/abs/q-alg/9606016).

   I was just reminded of John Baez years ago describing Bar-Natan’s paper on the four-color problem and the relation between $SU(2)$ and $SU(n)$ gauge theory. Bar-Natan’s paper is here.

4. • CommentRowNumber4.
   • CommentAuthorUrs
   • CommentTimeJan 24th 2020
   • PermaLink
   Author: Urs
   Format: MarkdownItexThanks, excellent. So let's add that to all related entries: On the [[logical equivalence]] between the [[four-colour theorem]] and a statement about transition from the [[small N limit]] to the [[large N limit]] for [[Lie algebra weight systems]] on [[Jacobi diagrams]] via the [['t Hooft double line construction]]: * [[Dror Bar-Natan]], _Lie Algebras and the Four Color Theorem_, Combinatorica 17-1(1997) 43–52 ([arXiv:q-alg/9606016](https://arxiv.org/abs/q-alg/9606016), [doi:10.1007/BF01196130](https://doi.org/10.1007/BF01196130))

   Thanks, excellent. So let’s add that to all related entries:

   On the logical equivalence between the four-colour theorem and a statement about transition from the small N limit to the large N limit for Lie algebra weight systems on Jacobi diagrams via the ’t Hooft double line construction:

   • Dror Bar-Natan, Lie Algebras and the Four Color Theorem, Combinatorica 17-1(1997) 43–52 (arXiv:q-alg/9606016, doi:10.1007/BF01196130)
5. • CommentRowNumber5.
   • CommentAuthorUrs
   • CommentTimeJan 24th 2020
   • (edited Jan 24th 2020)
   • PermaLink
   Author: Urs
   Format: MarkdownItexI wonder if Bar-Natan didn't know that the double line construction he uses so effectively is earlier due to 't Hooft, or if he intentionally chose to never cite him. Seems a curious omission.

   I wonder if Bar-Natan didn’t know that the double line construction he uses so effectively is earlier due to ’t Hooft, or if he intentionally chose to never cite him. Seems a curious omission.

6. • CommentRowNumber6.
   • CommentAuthorDavid_Corfield
   • CommentTimeJan 24th 2020
   • PermaLink
   Author: David_Corfield
   Format: MarkdownItexThat would be fun if M-theory could help out with the four-colour problem!

   That would be fun if M-theory could help out with the four-colour problem!

7. • CommentRowNumber7.
   • CommentAuthorUrs
   • CommentTimeJan 24th 2020
   • PermaLink
   Author: Urs
   Format: MarkdownItexadded this pointer on [[1/N corrections]] in [[2d QCD]]: * [[Itzhak Bars]], _QCD and Strings in 2D_ ([arXiv:hep-th/9312018](https://arxiv.org/abs/hep-th/9312018)) <a href="https://ncatlab.org/nlab/revision/diff/large+1%2FN+limit/4">diff</a>, <a href="https://ncatlab.org/nlab/revision/large+1%2FN+limit/4">v4</a>, <a href="https://ncatlab.org/nlab/show/large+1%2FN+limit">current</a>

   added this pointer on 1/N corrections in 2d QCD:

   • Itzhak Bars, QCD and Strings in 2D (arXiv:hep-th/9312018)

   diff, v4, current

8. • CommentRowNumber8.
   • CommentAuthorUrs
   • CommentTimeJan 24th 2020
   • PermaLink
   Author: Urs
   Format: MarkdownItexadded this pointer: * David Jorrin, Nicolas Kovensky, Martin Schvellinger, _Towards $1/N$ corrections to deep inelastic scattering from the gauge/gravity duality_, JHEP 04 (2016) 113 ([arXiv:1601.01627](https://arxiv.org/abs/1601.01627)) <a href="https://ncatlab.org/nlab/revision/diff/large+1%2FN+limit/4">diff</a>, <a href="https://ncatlab.org/nlab/revision/large+1%2FN+limit/4">v4</a>, <a href="https://ncatlab.org/nlab/show/large+1%2FN+limit">current</a>

   added this pointer:

   • David Jorrin, Nicolas Kovensky, Martin Schvellinger, Towards $1/N$ corrections to deep inelastic scattering from the gauge/gravity duality, JHEP 04 (2016) 113 (arXiv:1601.01627)

   diff, v4, current

9. • CommentRowNumber9.
   • CommentAuthorUrs
   • CommentTimeMar 11th 2020
   • PermaLink
   Author: Urs
   Format: MarkdownItexadded pointer to * Masayasu Harada, Shinya Matsuzaki, and Koichi Yamawaki, _Implications of holographic QCD in chiral perturbation theory with hidden local symmetry_, Phys. Rev. D 74, 076004 (2006) ([doi:10.1103/PhysRevD.74.076004](https://doi.org/10.1103/PhysRevD.74.076004)) <a href="https://ncatlab.org/nlab/revision/diff/large+1%2FN+limit/7">diff</a>, <a href="https://ncatlab.org/nlab/revision/large+1%2FN+limit/7">v7</a>, <a href="https://ncatlab.org/nlab/show/large+1%2FN+limit">current</a>

   added pointer to

   • Masayasu Harada, Shinya Matsuzaki, and Koichi Yamawaki, Implications of holographic QCD in chiral perturbation theory with hidden local symmetry, Phys. Rev. D 74, 076004 (2006) (doi:10.1103/PhysRevD.74.076004)

   diff, v7, current

10. • CommentRowNumber10.
    • CommentAuthorUrs
    • CommentTimeAug 30th 2021
    • PermaLink
    Author: Urs
    Format: MarkdownItexadded pointer to today's: * Yosuke Imamura, *Finite-$N$ superconformal index via the AdS/CFT correspondence* ([arXiv:2108.12090](https://arxiv.org/abs/2108.12090)) <a href="https://ncatlab.org/nlab/revision/diff/large+1%2FN+limit/10">diff</a>, <a href="https://ncatlab.org/nlab/revision/large+1%2FN+limit/10">v10</a>, <a href="https://ncatlab.org/nlab/show/large+1%2FN+limit">current</a>

    added pointer to today’s:

    • Yosuke Imamura, Finite-$N$ superconformal index via the AdS/CFT correspondence (arXiv:2108.12090)

    diff, v10, current