Second variation of liquid crystal energy at x [absolute value of x]
journal contributionposted on 01.01.1991 by David Kinderlehrer, Biao Ou
Any type of content formally published in an academic journal, usually following a peer-review process.
Abstract: "A new and simplified proof of the sign of the second variation of the Oseen-Frank Energy in terms of the elastic constants is given. The proof relies on the frame indifference of the energy and a new expression for the second invariant null lagrangian as a surface integral."