Discrete Dynamics in Nature and Society / 2012 / Article / Alg 1

Research Article

A Cloud-Computing-Based Data Placement Strategy in High-Speed Railway

Algorithm 1

Formal description.
Formal description of a semi-definite programming problem
Solution:
  
 Satisfying:
    are unit vectors;
    and form the matrix and all its
eigenvalues are greater than or equal to 0,
  that is, matrix is semi-definite.