{"type":"standard","title":"Oise amber","displaytitle":"Oise amber","namespace":{"id":0,"text":""},"wikibase_item":"Q116449373","titles":{"canonical":"Oise_amber","normalized":"Oise amber","display":"Oise amber"},"pageid":72737333,"thumbnail":{"source":"https://upload.wikimedia.org/wikipedia/commons/thumb/9/91/Elektroepyris_magnificus_holotype_MNHN.F.A30298_dorsal.jpg/330px-Elektroepyris_magnificus_holotype_MNHN.F.A30298_dorsal.jpg","width":320,"height":213},"originalimage":{"source":"https://upload.wikimedia.org/wikipedia/commons/9/91/Elektroepyris_magnificus_holotype_MNHN.F.A30298_dorsal.jpg","width":1772,"height":1181},"lang":"en","dir":"ltr","revision":"1258904756","tid":"f7abaad4-a8a7-11ef-b9f6-d831b83a0884","timestamp":"2024-11-22T08:01:24Z","description":"Type of amber found in France","description_source":"local","content_urls":{"desktop":{"page":"https://en.wikipedia.org/wiki/Oise_amber","revisions":"https://en.wikipedia.org/wiki/Oise_amber?action=history","edit":"https://en.wikipedia.org/wiki/Oise_amber?action=edit","talk":"https://en.wikipedia.org/wiki/Talk:Oise_amber"},"mobile":{"page":"https://en.m.wikipedia.org/wiki/Oise_amber","revisions":"https://en.m.wikipedia.org/wiki/Special:History/Oise_amber","edit":"https://en.m.wikipedia.org/wiki/Oise_amber?action=edit","talk":"https://en.m.wikipedia.org/wiki/Talk:Oise_amber"}},"extract":"Oise amber is a type of amber found near the Oise river near Creil in northern France. Oise amber is around 53Â million years old, dating to the Early Eocene (Ypresian). Oise amber is softer than Baltic amber, although Oise amber is older and both types of amber have similar geographic origins. The formation is known for preserving a diverse fauna of invertebrates.","extract_html":"
Oise amber is a type of amber found near the Oise river near Creil in northern France. Oise amber is around 53Â million years old, dating to the Early Eocene (Ypresian). Oise amber is softer than Baltic amber, although Oise amber is older and both types of amber have similar geographic origins. The formation is known for preserving a diverse fauna of invertebrates.
"}{"type":"standard","title":"Harmonious coloring","displaytitle":"Harmonious coloring","namespace":{"id":0,"text":""},"wikibase_item":"Q5659354","titles":{"canonical":"Harmonious_coloring","normalized":"Harmonious coloring","display":"Harmonious coloring"},"pageid":690728,"thumbnail":{"source":"https://upload.wikimedia.org/wikipedia/commons/thumb/7/73/Harmonious_coloring_tree.svg/320px-Harmonious_coloring_tree.svg.png","width":320,"height":320},"originalimage":{"source":"https://upload.wikimedia.org/wikipedia/commons/thumb/7/73/Harmonious_coloring_tree.svg/300px-Harmonious_coloring_tree.svg.png","width":300,"height":300},"lang":"en","dir":"ltr","revision":"1152945582","tid":"3a86f38f-e98b-11ed-9828-fffabd4d1e30","timestamp":"2023-05-03T08:19:31Z","description":"Vertex coloring where no two linked nodes have the same color pairing","description_source":"local","content_urls":{"desktop":{"page":"https://en.wikipedia.org/wiki/Harmonious_coloring","revisions":"https://en.wikipedia.org/wiki/Harmonious_coloring?action=history","edit":"https://en.wikipedia.org/wiki/Harmonious_coloring?action=edit","talk":"https://en.wikipedia.org/wiki/Talk:Harmonious_coloring"},"mobile":{"page":"https://en.m.wikipedia.org/wiki/Harmonious_coloring","revisions":"https://en.m.wikipedia.org/wiki/Special:History/Harmonious_coloring","edit":"https://en.m.wikipedia.org/wiki/Harmonious_coloring?action=edit","talk":"https://en.m.wikipedia.org/wiki/Talk:Harmonious_coloring"}},"extract":"In graph theory, a harmonious coloring is a (proper) vertex coloring in which every pair of colors appears on at most one pair of adjacent vertices. It is the opposite of the complete coloring, which instead requires every color pairing to occur at least once. The harmonious chromatic number χH(G) of a graph G is the minimum number of colors needed for any harmonious coloring of G.","extract_html":"
In graph theory, a harmonious coloring is a (proper) vertex coloring in which every pair of colors appears on at most one pair of adjacent vertices. It is the opposite of the complete coloring, which instead requires every color pairing to occur at least once. The harmonious chromatic number χH(G) of a graph G is the minimum number of colors needed for any harmonious coloring of G.
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