Zr65Al10Ni10Cu15, Zr52.5Al10Ni10Cu15Be12.5 and Zr52.5Al10Ni14.6 Cu17.9Ti5bulk amorphous alloys were prepared by copper mould casting. The crystallization kineti
For the large sparse block two-by-two real nonsingular matrices, we establish a general framework of structured precondi-tioners through matrix transformation a