Peter René Oscar Bally was a Swiss botanical illustrator, botanist and taxonomist. The standard author abbreviation P.R.O.Bally is used to indicate this person as the author when citing a botanical name.
"}{"type":"standard","title":"Curvilinear coordinates","displaytitle":"Curvilinear coordinates","namespace":{"id":0,"text":""},"wikibase_item":"Q1790208","titles":{"canonical":"Curvilinear_coordinates","normalized":"Curvilinear coordinates","display":"Curvilinear coordinates"},"pageid":755300,"thumbnail":{"source":"https://upload.wikimedia.org/wikipedia/commons/thumb/0/0c/Curvilinear.svg/330px-Curvilinear.svg.png","width":320,"height":342},"originalimage":{"source":"https://upload.wikimedia.org/wikipedia/commons/thumb/0/0c/Curvilinear.svg/472px-Curvilinear.svg.png","width":472,"height":504},"lang":"en","dir":"ltr","revision":"1278787242","tid":"535be3a4-f913-11ef-9a74-4c3ba47fce6e","timestamp":"2025-03-04T16:11:27Z","description":"Coordinate system whose directions vary in space","description_source":"local","content_urls":{"desktop":{"page":"https://en.wikipedia.org/wiki/Curvilinear_coordinates","revisions":"https://en.wikipedia.org/wiki/Curvilinear_coordinates?action=history","edit":"https://en.wikipedia.org/wiki/Curvilinear_coordinates?action=edit","talk":"https://en.wikipedia.org/wiki/Talk:Curvilinear_coordinates"},"mobile":{"page":"https://en.m.wikipedia.org/wiki/Curvilinear_coordinates","revisions":"https://en.m.wikipedia.org/wiki/Special:History/Curvilinear_coordinates","edit":"https://en.m.wikipedia.org/wiki/Curvilinear_coordinates?action=edit","talk":"https://en.m.wikipedia.org/wiki/Talk:Curvilinear_coordinates"}},"extract":"In geometry, curvilinear coordinates are a coordinate system for Euclidean space in which the coordinate lines may be curved. These coordinates may be derived from a set of Cartesian coordinates by using a transformation that is locally invertible at each point. This means that one can convert a point given in a Cartesian coordinate system to its curvilinear coordinates and back. The name curvilinear coordinates, coined by the French mathematician Lamé, derives from the fact that the coordinate surfaces of the curvilinear systems are curved.","extract_html":"
In geometry, curvilinear coordinates are a coordinate system for Euclidean space in which the coordinate lines may be curved. These coordinates may be derived from a set of Cartesian coordinates by using a transformation that is locally invertible at each point. This means that one can convert a point given in a Cartesian coordinate system to its curvilinear coordinates and back. The name curvilinear coordinates, coined by the French mathematician Lamé, derives from the fact that the coordinate surfaces of the curvilinear systems are curved.
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