{"product_id":"9789810237349","title":"VARIATIONAL PRINCIPLES FOR SECOND-ORDER DIFFERENTIAL EQUATIONS, APPLICATION OF THE SPENCER THEORY OF","description":"\u003cp\u003eThis work looks at second-order differential equations and asks if they can be written as Euler-Lagrangian equations. To solve the inverse problem, the authors use the formal integrability theory of overdetermined partial differential systems in the Spencer-Quillen-Goldschmidt version.\u003c\/p\u003e","brand":"World Scientific Publishing Co Pte Ltd","offers":[{"title":"Default Title","offer_id":42952780480587,"sku":"00000_00000_00000_00000","price":3387.06,"currency_code":"THB","in_stock":false}],"url":"https:\/\/kinokuniya.co.th\/th\/products\/9789810237349","provider":"Books Kinokuniya Thailand","version":"1.0","type":"link"}