In order to improve their speed , " fast polynomial multiplication algorithm " and " fast algorithm of r - circulant matrix inversion " are proposed , which offer obviously computational advantages 本文提出了“快速多項式乘法運算”算法和“ r -循環(huán)矩陣快速乘逆運算”算法,用以提高這兩種運算的速度,具有明顯的速度優(yōu)勢。