# User contributions

From Polymath1Wiki

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- 23:29, 12 January 2020 (diff | hist) . . (-222) . . Hadwiger-Nelson problem (→Best known results for the chromatic number in higher dimensions: fixed link to R4)
- 01:44, 8 January 2020 (diff | hist) . . (+328) . . Hadwiger-Nelson problem (→Best bounds for different shapes that can be k-colored: added table for disks)
- 01:42, 20 November 2019 (diff | hist) . . (+1) . . Hadwiger-Nelson problem (→Notable unit distance graphs)
- 01:41, 20 November 2019 (diff | hist) . . (+173) . . Hadwiger-Nelson problem (→Notable unit distance graphs: added 510 vertex record)
- 10:12, 25 October 2019 (diff | hist) . . (+132) . . Hadwiger-Nelson problem (→Best bounds for different shapes that can be k-colored: added k=3 lower bound)
- 10:34, 9 October 2019 (diff | hist) . . (+124) . . Hadwiger-Nelson problem (→Best bounds for different shapes that can be k-colored: added 1.25 for k=4)
- 11:14, 8 October 2019 (diff | hist) . . (+126) . . Hadwiger-Nelson problem (→Best bounds for different shapes that can be k-colored: improved lower bound for k=5: https://dustingmixon.wordpress.com/2019/08/05/polymath16-fourteenth-thread-automated-graph-minimization/#comment-24369)
- 04:28, 28 September 2019 (diff | hist) . . (0) . . m Hadwiger-Nelson problem (→Best bounds for different shapes that can be k-colored)
- 10:26, 25 September 2019 (diff | hist) . . (+131) . . Hadwiger-Nelson problem (→Best bounds for different shapes that can be k-colored: added upper bound for k=4)
- 10:43, 18 September 2019 (diff | hist) . . (+13) . . Hadwiger-Nelson problem (→Best bounds for different shapes that can be k-colored: added new best for k=4)
- 10:09, 12 September 2019 (diff | hist) . . (+204) . . Hadwiger-Nelson problem (→Best bounds for different shapes that can be k-colored: added bock citation)
- 10:55, 23 August 2019 (diff | hist) . . (+2) . . Hadwiger-Nelson problem (→Best bounds for different shapes that can be k-colored: added new bound for k=4 by Felix Bock)
- 11:59, 22 August 2019 (diff | hist) . . (+223) . . m Hadwiger-Nelson problem (→Best bounds for different shapes that can be k-colored)
- 11:57, 22 August 2019 (diff | hist) . . (+274) . . Hadwiger-Nelson problem (added bounds for shapes)
- 15:21, 28 July 2019 (diff | hist) . . (0) . . Hadwiger-Nelson problem (→Notable unit distance graphs)
- 15:20, 28 July 2019 (diff | hist) . . (+174) . . Hadwiger-Nelson problem (→Notable unit distance graphs: added 519)
- 13:26, 16 July 2019 (diff | hist) . . (+167) . . Hadwiger-Nelson problem (→Notable unit distance graphs: added 525 vertex record)
- 00:00, 8 July 2019 (diff | hist) . . (+280) . . Hadwiger-Nelson problem (→Notable unit distance graphs: added 529 vertex graphs)
- 22:58, 10 May 2019 (diff | hist) . . (+182) . . Hadwiger-Nelson problem (→Best known results for the chromatic number of spheres: added SV paper)
- 03:58, 7 May 2019 (diff | hist) . . (+154) . . Probabilistic formulation of Hadwiger-Nelson problem (→Bounds on p_d for 4-colourings: added strictness for 1/2) (current)
- 01:12, 24 April 2019 (diff | hist) . . (-6) . . m Probabilistic formulation of Hadwiger-Nelson problem (→Proposition 36: deleted acute)
- 11:38, 16 April 2019 (diff | hist) . . (+86) . . Hadwiger-Nelson problem (→Best known results for the chromatic number of spheres)
- 01:51, 25 March 2019 (diff | hist) . . (+1) . . Hadwiger-Nelson problem (→Best known results for the chromatic number of spheres: I've put a question mark after tetrahedron, because I've realized that I couldn't verify this and I keep on getting different numbers for the radius)
- 01:08, 25 March 2019 (diff | hist) . . (+29) . . Hadwiger-Nelson problem (→Best known results for the chromatic number of spheres)
- 00:45, 25 March 2019 (diff | hist) . . (+112) . . Hadwiger-Nelson problem (→Best known results for the chromatic number of spheres)
- 23:54, 24 March 2019 (diff | hist) . . (+213) . . Hadwiger-Nelson problem (→Best known results for the chromatic number of spheres: added range of \sqrt{(3-\sqrt 3)}/2)
- 12:38, 24 March 2019 (diff | hist) . .
**(+635)** . . Hadwiger-Nelson problem (added section about spheres based on Simmons paper https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S1446788700019315) - 05:46, 12 December 2018 (diff | hist) . . (+361) . . Probabilistic formulation of Hadwiger-Nelson problem (→Bounds on p_d for 4-colourings: fixed (\sqrt{6} \pm \sqrt{2})/2)
- 05:40, 12 December 2018 (diff | hist) . . (-86) . . Probabilistic formulation of Hadwiger-Nelson problem (Undo revision 10950 by Domotorp (talk))
- 05:37, 12 December 2018 (diff | hist) . . (+86) . . Probabilistic formulation of Hadwiger-Nelson problem (→Bounds on p_d for 4-colourings: improved (\sqrt{6} \pm \sqrt{2})/2)
- 01:41, 6 November 2018 (diff | hist) . . (+43) . . Probabilistic formulation of Hadwiger-Nelson problem (→Bounds on p_d for 4-colourings)
- 04:18, 24 August 2018 (diff | hist) . . (-55) . . Excluding bichromatic vertices (→Conjecture for using bichromatic vertices to bound CNP: added conjecture is true for lines) (current)
- 11:31, 7 August 2018 (diff | hist) . . (+1) . . m Probabilistic formulation of Hadwiger-Nelson problem (→Bounds on p_d for 4-colourings: fixed lemma 39 placing)
- 03:29, 6 August 2018 (diff | hist) . . (+6) . . m Probabilistic formulation of Hadwiger-Nelson problem (→Bounds on p_d for 4-colourings: added <=2 to general lower bound)
- 02:36, 6 August 2018 (diff | hist) . . (+113) . . Probabilistic formulation of Hadwiger-Nelson problem (→Bounds on p_d for 4-colourings: added >=SQRT(2))
- 02:31, 6 August 2018 (diff | hist) . .
**(+603)** . . Probabilistic formulation of Hadwiger-Nelson problem (→Proofs of bounds: added lemma 39, general lower bound 1/25) - 02:07, 6 August 2018 (diff | hist) . . (+147) . . Probabilistic formulation of Hadwiger-Nelson problem (→Bounds on p_d for 4-colourings: improved lower for 1/\sqrt{3})
- 01:47, 6 August 2018 (diff | hist) . . (+9) . . m Probabilistic formulation of Hadwiger-Nelson problem (→Bounds on p_d for 4-colourings: added lemma 15 to \sqrt{3} lower bound)
- 05:57, 19 July 2018 (diff | hist) . . (+14) . . m Hadwiger-Nelson problem (→Notable unit distance graphs: fixed link to >V_A \oplus V_A \oplus V_A)
- 05:05, 19 July 2018 (diff | hist) . . (-4) . . m Probabilistic formulation of Hadwiger-Nelson problem (→Bounds on p_d for 4-colourings: added 0.26 to \sqrt{3})
- 00:55, 14 July 2018 (diff | hist) . . (0) . . Probabilistic formulation of Hadwiger-Nelson problem (→Bounds on p_d for 4-colourings: fixed large d)
- 00:55, 14 July 2018 (diff | hist) . . (0) . . m Probabilistic formulation of Hadwiger-Nelson problem (→Proposition 36: also statement)
- 00:54, 14 July 2018 (diff | hist) . . (-14) . . Probabilistic formulation of Hadwiger-Nelson problem (→Proposition 36: fixed error at the end)
- 00:09, 11 July 2018 (diff | hist) . . (+15) . . m Probabilistic formulation of Hadwiger-Nelson problem (→Bounds on p_d for 4-colourings: fixed bound for large d)
- 00:08, 11 July 2018 (diff | hist) . . (+256) . . Probabilistic formulation of Hadwiger-Nelson problem (→Proposition 36: fixed last case error)
- 13:33, 10 July 2018 (diff | hist) . . (-27) . . Excluding bichromatic vertices (→Conjecture for using bichromatic vertices to bound CNP: improved previous)
- 13:29, 10 July 2018 (diff | hist) . .
**(+1,607)** . . Excluding bichromatic vertices (added conjecture) - 13:13, 10 July 2018 (diff | hist) . . (-267) . . Probabilistic formulation of Hadwiger-Nelson problem (→Bounds on p_d for 4-colourings: fixed incorrect lemma 2, cor 16 refs, updated upper bounds from prop 36)
- 13:01, 10 July 2018 (diff | hist) . . (+164) . . Probabilistic formulation of Hadwiger-Nelson problem (→Bounds on p_d for 4-colourings: added two more values from Prop 36)
- 12:55, 10 July 2018 (diff | hist) . .
**(+740)** . . Probabilistic formulation of Hadwiger-Nelson problem (→Proposition 36: added new construction with iteration)

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