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- Douglas J. Klein

Discipline name
D-index
D-index (Discipline H-index) only includes papers and citation values for an examined
discipline in contrast to General H-index which accounts for publications across all
disciplines.
Citations
Publications
World Ranking
National Ranking

Mathematics
D-index
45
Citations
6,731
215
World Ranking
1040
National Ranking
491

- Quantum mechanics
- Geometry
- Electron

The scientist’s investigation covers issues in Combinatorics, Computational chemistry, Wiener index, Hückel method and Pure mathematics. His Combinatorics study frequently intersects with other fields, such as Discrete mathematics. His studies in Computational chemistry integrate themes in fields like Octahedral symmetry, Electronegativity, Boron, MNDO and Hamiltonian.

The study incorporates disciplines such as Kirchhoff index, SIMPLE algorithm, Matrix and Topological index in addition to Wiener index. His Hückel method research incorporates elements of Atomic cluster, Buckminsterfullerene, Electronic structure and Spin-½. His Molecule research is multidisciplinary, incorporating perspectives in Elemental carbon, Molecular physics and Polyhedron.

- Elemental carbon cages (608 citations)
- On the definition of the hyper-Wiener index for cycle-containing structures (217 citations)
- Graphitic polymer strips with edge states (213 citations)

Combinatorics, Computational chemistry, Condensed matter physics, Discrete mathematics and Molecule are his primary areas of study. Graph, Resistance distance, Enumeration, Graph theory and Wiener index are subfields of Combinatorics in which his conducts study. His Resistance distance study often links to related topics such as Kirchhoff index.

His Computational chemistry research includes elements of Chemical physics, Aromaticity, Conjugated system, Molecular physics and Hückel method. His Condensed matter physics research is multidisciplinary, incorporating elements of Electron and Valence bond theory. Douglas J. Klein studies Generalized valence bond, a branch of Valence bond theory.

- Combinatorics (25.70%)
- Computational chemistry (16.41%)
- Condensed matter physics (13.62%)

- Combinatorics (25.70%)
- Condensed matter physics (13.62%)
- Crystallography (8.98%)

His primary scientific interests are in Combinatorics, Condensed matter physics, Crystallography, Resistance distance and Computational chemistry. His Combinatorics research integrates issues from Discrete mathematics and Product. The Condensed matter physics study combines topics in areas such as Electron, Graphene and Ground state.

His Icosahedral symmetry study in the realm of Crystallography connects with subjects such as Borane. The various areas that Douglas J. Klein examines in his Resistance distance study include Kirchhoff index, Mathematical analysis, 1-planar graph, Graph product and Moore–Penrose pseudoinverse. His Computational chemistry research is multidisciplinary, relying on both Aromaticity, Theoretical physics, Chromophore, Graph theory and Uniqueness.

- A recursion formula for resistance distances and its applications (69 citations)
- Resistance distance-based graph invariants of subdivisions and triangulations of graphs (31 citations)
- A high-spin organic diradical as a spin filter (17 citations)

- Quantum mechanics
- Geometry
- Electron

Douglas J. Klein mainly investigates Combinatorics, Kirchhoff index, Molecule, Computational chemistry and Diradical. His Combinatorics research incorporates themes from Discrete mathematics and Invertible matrix. Douglas J. Klein has included themes like Recursion, Straight chain, Point, Random walk and Calculus in his Kirchhoff index study.

His research in Molecule intersects with topics in Chemical physics and Photochemistry, Chromophore. Douglas J. Klein combines subjects such as Structure, Aromaticity, Forcing, Chemistry and Graph theory with his study of Computational chemistry. His biological study spans a wide range of topics, including Crystallography, Intramolecular force, Ferromagnetism and Density functional theory.

This overview was generated by a machine learning system which analysed the scientist’s body of work. If you have any feedback, you can contact us here.

On the definition of the hyper-Wiener index for cycle-containing structures

Douglas J. Klein;István Lukovits;Ivan Gutman.

Journal of Chemical Information and Computer Sciences **(1995)**

398 Citations

Graphitic polymer strips with edge states

D.J. Klein.

Chemical Physics Letters **(1994)**

320 Citations

Extensions of the Wiener Number

H.-Y. Zhu;Douglas J. Klein;István Lukovits.

Journal of Chemical Information and Computer Sciences **(1996)**

267 Citations

Molecular cyclicity and centricity of polycyclic graphs. I. Cyclicity based on resistance distances or reciprocal distances

Danail Bonchev;Alexandru T. Balaban;Xiaoyu Liu;Douglas J. Klein.

International Journal of Quantum Chemistry **(1994)**

237 Citations

Degenerate perturbation theory

D. J. Klein.

Journal of Chemical Physics **(1974)**

220 Citations

Icosahedral symmetry carbon cage molecules

D. J. Klein;W. A. Seitz;T. G. Schmalz.

Nature **(1986)**

191 Citations

Resistance-Distance Sum Rules*

Douglas J. Klein.

Croatica Chemica Acta **(2002)**

185 Citations

Resistance-distance matrix: A computational algorithm and its application

Darko Babić;Douglas Klein;Istvan Lukovits;Sonja Nikolić.

International Journal of Quantum Chemistry **(2002)**

175 Citations

Graphical properties of polyhexes: perfect matching vector and forcing

Frank Harary;Douglas J. Klein;Tomislav P. Živkovič.

Journal of Mathematical Chemistry **(1991)**

141 Citations

Molecular topological index: a relation with the Wiener index

Douglas J. Klein;Zlatko Mihalic;Dejan Plavsic;Nenad Trinajstic.

Journal of Chemical Information and Computer Sciences **(1992)**

140 Citations

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