SIR WILLIAM BLACKSTONE, an 18th-century jurist who wrote a famous four-volume history of English law, described a man’s right to trial by his peers as “the principal bulwark of our liberties”.

We proved that each square quaternion matrix has at least one right characteristic principal value and its eigenvector, and a concrete solution was given.

The reasonable mediation of value conflict in accounting norms changes lies in strengthening process control and giving a certain amount right to select for economic principal part.