Found 90 Documents (Results 1–90)
A Frobenius problem suggested by prime \(k\)-tuplets. (English) Zbl 1519.11013
Reviewer: Jaak Henno (Tallinn)
On the seven non-isomorphic solutions of the fifteen schoolgirl problem. (English) Zbl 1511.05024
MSC:
05B07
Bijections for ranked tree-child networks. (English) Zbl 1491.92086
MSC:
92D15
Rainbow and monochromatic circuits and cocircuits in binary matroids. (English) Zbl 1495.05024
Reviewer: Kelly J. Pearson (Murray)
A generalized-polymatroid approach to disjoint common independent sets in two matroids. (English) Zbl 1414.05072
Blocking optimal structures. (English) Zbl 1387.05262
MSC:
05D15
Homomorphisms and colourings of oriented graphs: an updated survey. (English) Zbl 1334.05046
MSC:
05C15
Point determining digraphs, \(\{ 0,1 \}\)-matrix partitions, and dualities in full homomorphisms. (English) Zbl 1315.05066
MSC:
05C20
Trees, tight-spans and point configurations. (English) Zbl 1301.54042
Reviewer: Hans Peter Künzi (Rondebosch)
Acyclic homomorphisms to stars of graph Cartesian products and chordal bipartite graphs. (English) Zbl 1244.05151
Extending precolourings of circular cliques. (English) Zbl 1238.05085
MSC:
05C15
The sum of the distances between the leaves of a tree and the ‘semi-regular’ property. (English) Zbl 1222.05027
A kernel of order \(2k - c\) for Vertex Cover. (English) Zbl 1223.05242
MSC:
05C70
Matching signatures and Pfaffian graphs. (English) Zbl 1222.05213
MSC:
05C70
Subspace intersection graphs. (English) Zbl 1222.05218
MSC:
05C75
Acyclic 4-choosability of planar graphs with neither 4-cycles nor triangular 6-cycles. (English) Zbl 1209.05063
On wreathed lexicographic products of graphs. (English) Zbl 1195.05064
MSC:
05C76
All countable monoids embed into the monoid of the infinite random graph. (English) Zbl 1194.05142
Reviewer: Ulrich Knauer (Oldenburg)
The capture time of a graph. (English) Zbl 1177.91056
The good, the bad, and the great: homomorphisms and cores of random graphs. (English) Zbl 1215.05158
MSC:
05C80
Almost all graphs are rigid-revisited. (English) Zbl 1200.05102
MSC:
05C25
On unretractive graphs. (English) Zbl 1210.05127
On colorings of graph powers. (English) Zbl 1213.05082
A forbidden induced subgraph characterization of distance-hereditary 5-leaf powers. (English) Zbl 1221.05040
Gaps in semigroups. (English) Zbl 1235.11018
Reviewer: Olaf Ninnemann (Berlin)
On realizations of point determining graphs, and obstructions to full homomorphisms. (English) Zbl 1135.05042
Double graphs. (English) Zbl 1131.05042
Mixed hypergraphs and other coloring problems. (English) Zbl 1117.05043
Reviewer: Lorenzo Traldi (Easton)
MSC:
05C15
The structure of bi-arc trees. (English) Zbl 1110.05093
Matrix partitions of perfect graphs. (English) Zbl 1143.05035
Reviewer: Bert Randerath (Köln)
Resolvable group divisible designs with block size four and index three. (English) Zbl 1086.05016
MSC:
05B05
On (\(g\), 4; 1)-difference matrices. (English) Zbl 1081.05015
Reviewer: Mohammad-Reza Darafsheh (Tehran)
MSC:
05B10
Cuts and bounds. (English) Zbl 1076.05089
Chromatic numbers and products. (English) Zbl 1073.05025
MSC:
05C15
Some new \(\mathbb{Z}\)-cyclic whist tournament designs. (English) Zbl 1069.05005
Reviewer: Luc Teirlinck (Auburn)
MSC:
05B05
Ranking whist players. (English) Zbl 1042.05011
Minimum embedding of balanced \(P_{4}\)-designs into 5-cycle systems. (English) Zbl 1035.05016
Reviewer: Charles J. Colbourn (Tempe)
MSC:
05B05
\(Z\)-cyclic generalized whist frames and \(Z\)-cyclic generalized whist tournaments. (English) Zbl 1034.05005
MSC:
05B05
One frame and several new infinite families of \(Z\)-cyclic whist designs. (English) Zbl 1039.05013
Reviewer: Kishore Sinha (Ranchi)
MSC:
05B05
Existence of OBIBDs with \(k=4\) with and without nesting. (English) Zbl 1025.05008
Reviewer: Charles J.Colbourn (Burlington)
MSC:
05B05
Inductive extensions of some \(Z\)-cyclic whist tournaments. (English) Zbl 0924.05005
Reviewer: Peter Boyvalenkov (Sofia)
MSC:
05B05
On the construction of balanced Room squares. (English) Zbl 0933.05022
Reviewer: Du Ding-Zhu (Minneapolis)
MSC:
05B15
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