{"type":"standard","title":"Ptolemaic graph","displaytitle":"Ptolemaic graph","namespace":{"id":0,"text":""},"wikibase_item":"Q24884155","titles":{"canonical":"Ptolemaic_graph","normalized":"Ptolemaic graph","display":"Ptolemaic graph"},"pageid":50730814,"thumbnail":{"source":"https://upload.wikimedia.org/wikipedia/commons/thumb/3/39/Identity_graph2.svg/320px-Identity_graph2.svg.png","width":320,"height":320},"originalimage":{"source":"https://upload.wikimedia.org/wikipedia/commons/thumb/3/39/Identity_graph2.svg/256px-Identity_graph2.svg.png","width":256,"height":256},"lang":"en","dir":"ltr","revision":"1260982560","tid":"dd6faa01-b198-11ef-afe4-4f1693a0a979","timestamp":"2024-12-03T17:05:58Z","description":"Graphs whose distances obey Ptolemy's inequality","description_source":"local","content_urls":{"desktop":{"page":"https://en.wikipedia.org/wiki/Ptolemaic_graph","revisions":"https://en.wikipedia.org/wiki/Ptolemaic_graph?action=history","edit":"https://en.wikipedia.org/wiki/Ptolemaic_graph?action=edit","talk":"https://en.wikipedia.org/wiki/Talk:Ptolemaic_graph"},"mobile":{"page":"https://en.m.wikipedia.org/wiki/Ptolemaic_graph","revisions":"https://en.m.wikipedia.org/wiki/Special:History/Ptolemaic_graph","edit":"https://en.m.wikipedia.org/wiki/Ptolemaic_graph?action=edit","talk":"https://en.m.wikipedia.org/wiki/Talk:Ptolemaic_graph"}},"extract":"In graph theory, a Ptolemaic graph is an undirected graph whose shortest path distances obey Ptolemy's inequality, which in turn was named after the Greek astronomer and mathematician Ptolemy. The Ptolemaic graphs are exactly the graphs that are both chordal and distance-hereditary; they include the block graphs and are a subclass of the perfect graphs.","extract_html":"
In graph theory, a Ptolemaic graph is an undirected graph whose shortest path distances obey Ptolemy's inequality, which in turn was named after the Greek astronomer and mathematician Ptolemy. The Ptolemaic graphs are exactly the graphs that are both chordal and distance-hereditary; they include the block graphs and are a subclass of the perfect graphs.
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{"fact":"The world\u2019s rarest coffee, Kopi Luwak, comes from Indonesia where a wildcat known as the luwak lives. The cat eats coffee berries and the coffee beans inside pass through the stomach. The beans are harvested from the cat\u2019s dung heaps and then cleaned and roasted. Kopi Luwak sells for about $500 for a 450 g (1 lb) bag.","length":319}
{"fact":"Cats have 30 teeth (12 incisors, 10 premolars, 4 canines, and 4 molars), while dogs have 42. Kittens have baby teeth, which are replaced by permanent teeth around the age of 7 months.","length":183}
{"fact":"Most cats give birth to a litter of between one and nine kittens. The largest known litter ever produced was 19 kittens, of which 15 survived.","length":142}
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