Volume XII, August, 1981

Research Article

The linear spaces on 15 points

Brouwer, A. E.

Ars Comb. 12, 3-35 (1981).

Research Article

A family of optimal trees

Eades, Peter; Jones, Leslie

Ars Comb. 12, 37-45 (1981).

Research Article

Eulerian trails with prescribed degrees in tournaments

Das, Prabir

Ars Comb. 12, 47-50 (1981).

Research Article

Existence of orthogonal diagonal latin squares

Wallis, W. D.; Zhu, L.

Ars Comb. 12, 51-68 (1981).

Research Article

Consecutive eulerian tree graphs

Shank, H.

Ars Comb. 12, 69-71 (1981).

Research Article

Perfect pair-coverings and an algorithm for certain (1-2) factorizations of the complete graph K//(2s+1)

Mullin, R. C.; Stanton, R. G.; Stinson, D. R.

Ars Comb. 12, 73-80 (1981).

Research Article

Prime Boolean matrices – a graph theoretic approach

Gregory, David A.; Pullman, Norman J.

Ars Comb. 12, 81-110 (1981).

Research Article

Isometric embeddability for graphs

Melter, R. A.; Tumescu, I.

Ars Comb. 12, 111-115 (1981).

Research Article

A note on the decomposition of trees into isomorphic subtrees

Alon, Noga

Ars Comb. 12, 117-121 (1981).

Research Article

On some particular disjoint and mutually balanced partial quadruple systems

Gionfriddo, Mario

Ars Comb. 12, 123-134 (1981).

Research Article

Connected graphs with complementary edge-orbits

Gethner, Ellen; Hutchinson, Joan P.

Ars Comb. 12, 135-146 (1981).

Research Article

Elliptic semiplanes. II: Structure theory

Baker, R. D.; Ebert, G. L.

Ars Comb. 12, 147-164 (1981).

Research Article

Partitioning theorems for incomplete block designs

Jacroux, Mike

Ars Comb. 12, 165-177 (1981).

Research Article

Some inequalities for block intersection numbers

Jacroux, Mike

Ars Comb. 12, 179-188 (1981).

Research Article

Mutually orthogonal resolutions from finite geometries

Fuji-Hara, R.; Vanstone, S. A.

Ars Comb. 12, 189-207 (1981).

Research Article

Automorphisms of circuit difference systems

Kelly, John B.

Ars Comb. 12, 209-228 (1981).

Research Article

Some constructions for frames, room squars, and subsquares

Stinson, D. R.

Ars Comb. 12, 229-267 (1981).

Research Article

Symmetric 2-designs having PSL(2,q) fixing a block

Kelly, Graham

Ars Comb. 12, 269-293 (1981).

Research Article

The asymptotics of Menages numbers

Nechvatal, James

Ars Comb. 12, 295-301 (1981).

Research Article

Tight subdesigns of symmetric designs

Baartmans, A.; Shrikhande, Mohan

Ars Comb. 12, 303-309 (1981).

Research Article

Homogeneously n-traceable graphs

Chartrand, Gary; Lesniak-Foster, Linda; Wall, Curtiss E.

Ars Comb. 12, 311-317 (1981).

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