Timeline for Understanding Kelley's intersection number (Boolean algebras)
Current License: CC BY-SA 4.0
5 events
| when toggle format | what | by | license | comment | |
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| Sep 1, 2021 at 17:47 | comment | added | Yemon Choi | @Hugh Your original question had a ttle which asked for "understanding" of the intersection number, and so my answer was meant to suggest that it can be viewed geometrically; indeed, the measure $\mu$ that is provided by the theorem you quote comes from a separating hyperplane argument IIRC. You even say "I am having a hard time understanding what is this intersection number concretely" and so I tried to offer a geometric formulation. If all you wanted was a walk-through of a simple solution to the exercise/example that you provided, then perhaps you could reword your question to that effect. | |
| Sep 1, 2021 at 17:46 | comment | added | Yemon Choi | @Hugh if you are referring to my proof that a particular set system has intersection 2/5, then I was not aiming to find the shortest proof, but rather to show how the geometric perspective with convex hulls could be applied. | |
| Sep 1, 2021 at 8:00 | comment | added | Hugh | Thank you for having taken the trouble to answer, but I have a feeling that your argument is overcomplicated. There must be a simpler approach. | |
| Aug 31, 2021 at 19:39 | history | edited | Yemon Choi | CC BY-SA 4.0 |
Added a worked example which should correspond to the example mentioned in the OP's question.
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| Aug 31, 2021 at 19:29 | history | answered | Yemon Choi | CC BY-SA 4.0 |