{"version":"1.0","type":"rich","provider_name":"EbookNetworking","provider_url":"https://www.ebooknetworking.net","title":"Lorentzian Manifolds, including: Wormhole, Alcubierre Drive, Gravitational Singularity, Minkowski Space, Closed Timelike Curve, Pseudo-riemannian ... Spacetime, Asymptotically Flat Spacetime","author_name":"Hephaestus Books","thumbnail_url":"https://www.ebooknetworking.net/books/124/332/big1243329564.jpg","thumbnail_width":330,"thumbnail_height":500,"html":"<a href=\"https://www.ebooknetworking.net/books_detail-1243329564.html\">Lorentzian Manifolds, including: Wormhole, Alcubierre Drive, Gravitational Singularity, Minkowski Space, Closed Timelike Curve, Pseudo-riemannian ... Spacetime, Asymptotically Flat Spacetime</a>","width":400,"height":300}