# User contributions

From Polymath1Wiki

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- 11:43, 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) (current)
- 11:09, 12 September 2019 (diff | hist) . . (+204) . . Hadwiger-Nelson problem (→Best bounds for different shapes that can be k-colored: added bock citation)
- 11:55, 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)
- 12:59, 22 August 2019 (diff | hist) . . (+223) . . m Hadwiger-Nelson problem (→Best bounds for different shapes that can be k-colored)
- 12:57, 22 August 2019 (diff | hist) . . (+274) . . Hadwiger-Nelson problem (added bounds for shapes)
- 16:21, 28 July 2019 (diff | hist) . . (0) . . Hadwiger-Nelson problem (→Notable unit distance graphs)
- 16:20, 28 July 2019 (diff | hist) . . (+174) . . Hadwiger-Nelson problem (→Notable unit distance graphs: added 519)
- 14:26, 16 July 2019 (diff | hist) . . (+167) . . Hadwiger-Nelson problem (→Notable unit distance graphs: added 525 vertex record)
- 01:00, 8 July 2019 (diff | hist) . . (+280) . . Hadwiger-Nelson problem (→Notable unit distance graphs: added 529 vertex graphs)
- 23:58, 10 May 2019 (diff | hist) . . (+182) . . Hadwiger-Nelson problem (→Best known results for the chromatic number of spheres: added SV paper)
- 04:58, 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)
- 02:12, 24 April 2019 (diff | hist) . . (-6) . . m Probabilistic formulation of Hadwiger-Nelson problem (→Proposition 36: deleted acute)
- 12:38, 16 April 2019 (diff | hist) . . (+86) . . Hadwiger-Nelson problem (→Best known results for the chromatic number of spheres)
- 02:51, 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)
- 02:08, 25 March 2019 (diff | hist) . . (+29) . . Hadwiger-Nelson problem (→Best known results for the chromatic number of spheres)
- 01:45, 25 March 2019 (diff | hist) . . (+112) . . Hadwiger-Nelson problem (→Best known results for the chromatic number of spheres)
- 00:54, 25 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)
- 13:38, 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) - 06:46, 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)
- 06:40, 12 December 2018 (diff | hist) . . (-86) . . Probabilistic formulation of Hadwiger-Nelson problem (Undo revision 10950 by Domotorp (talk))
- 06:37, 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)
- 02:41, 6 November 2018 (diff | hist) . . (+43) . . Probabilistic formulation of Hadwiger-Nelson problem (→Bounds on p_d for 4-colourings)
- 05:18, 24 August 2018 (diff | hist) . . (-55) . . Excluding bichromatic vertices (→Conjecture for using bichromatic vertices to bound CNP: added conjecture is true for lines) (current)
- 12:31, 7 August 2018 (diff | hist) . . (+1) . . m Probabilistic formulation of Hadwiger-Nelson problem (→Bounds on p_d for 4-colourings: fixed lemma 39 placing)
- 04:29, 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)
- 03:36, 6 August 2018 (diff | hist) . . (+113) . . Probabilistic formulation of Hadwiger-Nelson problem (→Bounds on p_d for 4-colourings: added >=SQRT(2))
- 03:31, 6 August 2018 (diff | hist) . .
**(+603)** . . Probabilistic formulation of Hadwiger-Nelson problem (→Proofs of bounds: added lemma 39, general lower bound 1/25) - 03:07, 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})
- 02:47, 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)
- 06:57, 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)
- 06:05, 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})
- 01:55, 14 July 2018 (diff | hist) . . (0) . . Probabilistic formulation of Hadwiger-Nelson problem (→Bounds on p_d for 4-colourings: fixed large d)
- 01:55, 14 July 2018 (diff | hist) . . (0) . . m Probabilistic formulation of Hadwiger-Nelson problem (→Proposition 36: also statement)
- 01:54, 14 July 2018 (diff | hist) . . (-14) . . Probabilistic formulation of Hadwiger-Nelson problem (→Proposition 36: fixed error at the end)
- 01:09, 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)
- 01:08, 11 July 2018 (diff | hist) . . (+256) . . Probabilistic formulation of Hadwiger-Nelson problem (→Proposition 36: fixed last case error)
- 14:33, 10 July 2018 (diff | hist) . . (-27) . . Excluding bichromatic vertices (→Conjecture for using bichromatic vertices to bound CNP: improved previous)
- 14:29, 10 July 2018 (diff | hist) . .
**(+1,607)** . . Excluding bichromatic vertices (added conjecture) - 14:13, 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)
- 14:01, 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)
- 13:55, 10 July 2018 (diff | hist) . .
**(+740)** . . Probabilistic formulation of Hadwiger-Nelson problem (→Proposition 36: added new construction with iteration) - 13:09, 10 July 2018 (diff | hist) . .
**(+1,348)** . . Probabilistic formulation of Hadwiger-Nelson problem (→Proposition 36: added iteration arguments) - 13:16, 7 July 2018 (diff | hist) . . (+121) . . Probabilistic formulation of Hadwiger-Nelson problem (→Lemma 38: added one line proof (also kept original))
- 13:11, 7 July 2018 (diff | hist) . . (+2) . . m Probabilistic formulation of Hadwiger-Nelson problem (→Lemma 37: added missing 3)
- 04:58, 5 July 2018 (diff | hist) . . (+1) . . Probabilistic formulation of Hadwiger-Nelson problem (→Proposition 36: fixed note 2)
- 14:11, 4 July 2018 (diff | hist) . . (+274) . . Probabilistic formulation of Hadwiger-Nelson problem (→Proposition 36: added note 2)
- 13:15, 4 July 2018 (diff | hist) . . (+65) . . Probabilistic formulation of Hadwiger-Nelson problem (→Proposition 36: fixed def of E and F as noted by Aubrey here https://dustingmixon.wordpress.com/2018/07/02/polymath16-ninth-thread-searching-for-a-6-coloring/#comment-5106)
- 14:35, 23 June 2018 (diff | hist) . . (+2) . . m Probabilistic formulation of Hadwiger-Nelson problem (→Proposition 36)
- 14:21, 23 June 2018 (diff | hist) . . (+83) . . Probabilistic formulation of Hadwiger-Nelson problem (→Proposition 36: lower bound on d)
- 14:00, 23 June 2018 (diff | hist) . . (+1) . . Probabilistic formulation of Hadwiger-Nelson problem (→Proposition 35: fixed BAD angle and \frac{1}{4} in first inequality)

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