{"version":"1.0","type":"rich","provider_name":"EbookNetworking","provider_url":"https://www.ebooknetworking.net","title":"Regular Polygons, Volume I: Applied New Theory of Trisection to Construct a Regular Heptagon for Centuries in the History of Mathematics","author_name":"Fen Chen","thumbnail_url":"https://www.ebooknetworking.net/books/096/715/big0967151112.jpg","thumbnail_width":330,"thumbnail_height":500,"html":"<a href=\"https://www.ebooknetworking.net/books_detail-0967151112.html\">Regular Polygons, Volume I: Applied New Theory of Trisection to Construct a Regular Heptagon for Centuries in the History of Mathematics</a>","width":400,"height":300}