On 2-Absorbing Subtractive Ideals in Semirings

In this paper, (1) a characterization of 2-absorbing ideals in the semiring (Z + 0 , gcd, lcm) is obtained; (2) some characterizations of 2-absorbing subtractive ideals in a semiring R are investigated; (3) the 2-absorbing avoidance theorem for subtractive ideals of a semiring R is obtained.