# Vol. 15 No. 3 (2020)

Published: 2020-12-24

## Articles

• ### A complete solution to the spectrum problem for graphs with six vertices and up to nine edges

Emre Kolotoglu
1-24
• ### On the uniformity of the approximation for $r$-associated Stirling numbers of the second Kind

Harold Connamacher, Julia Dobrosotskaya
25-42

43-74
• ### Normality of one-matching semi-Cayley graphs over finite abelian groups with maximum degree 3

Majid Arezoomand, Mohsen Ghasemi
75-87
• ### Degree sequence of the generalized Sierpiński ‎graph

Ali Behtoei, Mahsa Khatibi, Fatemeh Attarzadeh
88-97
• ### Bounds of characteristic polynomials of regular matroids

Martin Kochol
98-107

Wenchang Chu
108-116

117-129

Shen-Fu Tsai
130-132
• ### Binomial transforms of the balancing and Lucas-balancing polynomials

Nazmiye Yilmaz
133-144