Collapsible washing lines: a strangulation hazard.
نویسندگان
چکیده
منابع مشابه
Knots in Collapsible and Non-Collapsible Balls
We construct the first explicit example of a simplicial 3-ball B15,66 that is not collapsible. It has only 15 vertices. We exhibit a second 3-ball B12,38 with 12 vertices that is collapsible and not shellable, but evasive. Finally, we present the first explicit triangulation of a 3-sphere S18,125 (with only 18 vertices) that is not locally constructible. All these examples are based on knotted ...
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ژورنال
عنوان ژورنال: BMJ
سال: 1981
ISSN: 0959-8138,1468-5833
DOI: 10.1136/bmj.282.6277.1664