Heiko Harborth

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All two-color Rado numbers for a(x + y) = bz

Heiko Harborth, Silke Maasberg, H. Harborth, 1999, Discret. Math..

All Ramsey numbers for five vertices and seven or eight edges

Heiko Harborth, Ingrid Mengersen, 1989, Discret. Math..

Some Ramsey Schur Numbers

Hans-Dietrich O. F. Gronau, Heiko Harborth, Jens-P. Bode, 2005, Comb. Probab. Comput..

Eulerian straight ahead cycles in drawings of complete bipartite graphs

Heiko Harborth, 2001, Discret. Math..

Points Sets with Small Integral Distances

Lothar Piepmeyer, Heiko Harborth, 1990, Applied Geometry And Discrete Mathematics.

On the maximum number of edges in a c4-free subgraph of qn

Peter Braß, Heiko Harborth, Hauke Nienborg, 1995, J. Graph Theory.

The Maximum of the Maximum Rectilinear Crossing Numbers of d-Regular Graphs of Order n

Matthew Alpert, Heiko Harborth, Elie Feder, 2008, Electron. J. Comb..

Zero-Sum Ramsey Numbers modulo 3

Heiko Harborth, Lothar Piepmeyer, 1996, J. Comb. Theory, Ser. A.

Solution of Steinhaus's Problem with Plus and Minus Signs

Heiko Harborth, 1972, J. Comb. Theory, Ser. A.

On Path Convex Ramsey Numbers

Cecil C. Rousseau, Heiko Harborth, Chula J. Jayawardene, 2017, J. Graph Theory.

Minimum sets of partial polyominoes

Heiko Harborth, Hartmut Weiss, 1991, Australas. J Comb..

Maximale Länge von Folgen ohne trennende Teilblöcke

Heiko Harborth, 1973 .

An upper bound for the ramsey number r(K5 - e)

Heiko Harborth, Ingrid Mengersen, 1985, J. Graph Theory.

Directed paths of diagonals within polygons

Heiko Harborth, Jens-P. Bode, 2005, Discret. Math..

An upper bound for the minimum diameter of integral point sets

Arnfried Kemnitz, Heiko Harborth, Meinhard Möller, 1993, Discret. Comput. Geom..

Rado Numbers fora(x+y)=bz

Heiko Harborth, Silke Maasberg, H. Harborth, 1997, J. Comb. Theory, Ser. A.

The ramsey number of k5 - e

Geoffrey Exoo, Heiko Harborth, Ingrid Mengersen, 1989, J. Graph Theory.

Independence for knights on hexagon and triangle boards

Heiko Harborth, Jens-P. Bode, 2003, Discret. Math..

Weak independence number for grid graphs

Heiko Harborth, Heiko Dietrich, 2005 .

Ramsey numbers in octahedron graphs

Heiko Harborth, Ingrid Mengersen, 2001, Discret. Math..

Hexagonal polyomino achievement

Heiko Harborth, Jens-P. Bode, 2000, Discret. Math..

Special numbers of crossings for complete graphs

Heiko Harborth, 2002, Discret. Math..

King independence on triangle boards

Heiko Harborth, Jens-P. Bode, Martin Harborth, 2003, Discret. Math..

Point sets with many unit circles

Heiko Harborth, Ingrid Mengersen, 1986, Discret. Math..

Weakened Ramsey Numbers

Heiko Harborth, Meinhard Möller, H. Harborth, 1999, Discret. Appl. Math..

Ramsey numbers for sets of small graphs

Hans-Dietrich O. F. Gronau, Heiko Harborth, Christian Schwahn, 1994, Discret. Math..

Coloring arcs of convex sets

Hanno Lefmann, Heiko Harborth, 2000, Discret. Math..

Plane four-regular graphs with vertex-to-vertex unit triangles

Heiko Harborth, 1991, Discret. Math..

The drawing Ramsey number Dr(Kn)

Richard H. Schelp, Heiko Harborth, Ingrid Mengersen, 1995, Australas. J Comb..

The minimum size of kk-rainbow connected graphs of given order

Heiko Harborth, Jens-P. Bode, 2013, Discret. Math..

Smallest limited snakes in d-grids

Heiko Harborth, Christian Thürmann, 2001, Discret. Math..

Plane integral drawings of planar graphs

Arnfried Kemnitz, Heiko Harborth, 2001, Discret. Math..

No-three-in-line for seventeen and nineteen

Heiko Harborth, Thomas Prellberg, Philipp Oertel, 1989, Discret. Math..

Universal tilings of the plane by 0-1-matrices

Heiko Harborth, Knut Dehnhardt, 1989, Discret. Math..

Rainbows in the Hypercube

Maria Axenovich, Ingo Schiermeyer, Arnfried Kemnitz, 2007, Graphs Comb..

Empty triangles in drawings of the complete graph

Heiko Harborth, 1998, Discret. Math..

A PARTIAL PROOF OF THE ERDŐS-SZEKERES CONJECTURE FOR HEXAGONS

Zsolt Lángi, Heiko Harborth, Tu Braunschweig, 2009 .

Edges without crossings in drawings of complete graphs

Heiko Harborth, Ingrid Mengersen, 1974 .

Rado Numbers for Fibonacci Sequences and a Problem of S. Rabinowitz

Heiko Harborth, Silke Maasberg, H. Harborth, 1996 .

On the smallest limited snake of unit disks

Heiko Harborth, Tibor Bisztriczky, Lothar Piepmeyer, 1991 .

ON THE PROBLEM OF P. ERDÖS CONCERNING POINTS WITH INTEGRAL DISTANCES

Heiko Harborth, 1970 .

NUMBER OF ODD BINOMIAL COEFFICIENTS

Heiko Harborth, 1977 .

Calculations for Bertrand's Postulate

Arnfried Kemnitz, Heiko Harborth, H. Harborth, 1981 .

Minimum Integral Drawings of the Platonic Graphs

Heiko Harborth, Meinhard Möller, 1994 .

Smallest Limited Vertex-to-vertex Snakes of Unit Triangles

Heiko Harborth, László Szabo, Zoltán Ujváry-Menyhárt, 1999 .

Generalized Ramsey theory for graphs XII: Bipartite Ramsey sets

Frank Harary, Heiko Harborth, Ingrid Mengersen, 1981, Glasgow Mathematical Journal.

SOME SIMPLE ARRANGEMENTS OF PSEUDOLINES WITH A MAXIMUM NUMBER OF TRIANGLES

Heiko Harborth, H. Harborth, 1985 .

Newton Numbers for Overlapping Circular Discs

László Szabó, Heiko Harborth, M. Koch, 2001 .

Graceful Labelings of Nearly Complete Graphs

Heiko Harborth, H. Harborth, Detlev Beutner, 2002 .

CONCENTRIC CYCLES IN MOSAIC GRAPHS

Heiko Harborth, 1990 .

On empty convex polytopes

Heiko Harborth, Tibor Bisztriczky, 1995 .

All two-color Rado numbers for a ( x + y ) = bz

Heiko Harborth, Silke Maasberg, H. Harborth, 1999 .

Integral Distances in Point Sets

Heiko Harborth, H. Harborth, 1998 .

Edges with at Most One Crossing in Drawings of the Complete Graph

Heiko Harborth, I. Mengersen, 1990 .

Independence on triangular triangle boards

Heiko Harborth, Heiko Dietrich, 2005 .

Two-Distance Sets and the Golden Ratio

Heiko Harborth, Lothar Piepmeyer, 1993 .