Some sufficient and necessary conditions of the full symmetric real matrix is fulldefinite matrix are discussed.
讨论了全对称实矩阵是全正定矩阵的几个充分必要条件。
2
In this paper the concept of the fulldefinite matrix is given, some sufficient and necessary conditions of the full symmetric real matrix is fulldefinite matrix are discussed.
本文给出了全正定矩阵的概念，讨论了全对称实矩阵是全正定矩阵的几个充分必要条件。
3
Last year, NASA smacked a spent Centaur rocket into a Shadowed lunar crater and blew out the first definite signs that the moon is chock-full of water.