{"product_id":"9780817636685","title":"Singularity Theory and Gravitational Lensing (Progress in Mathematical Physics)","description":"\u003cp\u003eRoughly one third of this energy density of the universe is \"dark matter,\" matter that clusters gravitationally but does not emit light. However, most of the energy density of the universe appears to be in an even stranger form: energy associated with empty space.\u003c\/p\u003e","brand":"Birkhauser","offers":[{"title":"Default Title","offer_id":48677490131179,"sku":"00000_00000_00000_00000","price":402.84,"currency_code":"SGD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0758\/4484\/5803\/files\/9780817636685-1.jpg?v=1781642010","url":"https:\/\/kinokuniya.com.sg\/ja\/products\/9780817636685","provider":"Books Kinokuniya Singapore","version":"1.0","type":"link"}