Hans Delfs

986 total citations
16 papers, 460 citations indexed

About

Hans Delfs is a scholar working on Geometry and Topology, Mathematical Physics and Algebra and Number Theory. According to data from OpenAlex, Hans Delfs has authored 16 papers receiving a total of 460 indexed citations (citations by other indexed papers that have themselves been cited), including 6 papers in Geometry and Topology, 5 papers in Mathematical Physics and 5 papers in Algebra and Number Theory. Recurrent topics in Hans Delfs's work include Homotopy and Cohomology in Algebraic Topology (5 papers), Algebraic Geometry and Number Theory (4 papers) and Chaos-based Image/Signal Encryption (4 papers). Hans Delfs is often cited by papers focused on Homotopy and Cohomology in Algebraic Topology (5 papers), Algebraic Geometry and Number Theory (4 papers) and Chaos-based Image/Signal Encryption (4 papers). Hans Delfs collaborates with scholars based in Germany. Hans Delfs's co-authors include Helmut Knebl and Manfred Knebusch and has published in prestigious journals such as Lecture notes in mathematics, Pacific Journal of Mathematics and Mathematische Zeitschrift.

In The Last Decade

Hans Delfs

15 papers receiving 395 citations

Peers — A (Enhanced Table)

Peers by citation overlap · career bar shows stage (early→late) cites · hero ref

Name	h						Papers	Cites
Hans Delfs Germany	11	163	138	123	122	101	16	460
Hugh C. Williams Canada	14	175 1.1×	244 1.8×	65 0.5×	132 1.1×	66 0.7×	46	481
Edwin Weiss United States	7	239 1.5×	159 1.2×	133 1.1×	159 1.3×	43 0.4×	14	588
R. A. Mollin Canada	14	436 2.7×	263 1.9×	187 1.5×	324 2.7×	142 1.4×	110	861
Hans Riesel Sweden	9	131 0.8×	146 1.1×	38 0.3×	205 1.7×	54 0.5×	40	447
Anatolij A. Karatsuba Russia	5	94 0.6×	375 2.7×	65 0.5×	177 1.5×	42 0.4×	17	685
George Havas Australia	14	153 0.9×	283 2.1×	52 0.4×	58 0.5×	44 0.4×	62	610
Tao Zhan China	15	104 0.6×	124 0.9×	35 0.3×	227 1.9×	41 0.4×	56	588
Philippe Loustaunau United States	8	228 1.4×	101 0.7×	69 0.6×	235 1.9×	17 0.2×	20	562
Peter Kirschenhofer Austria	18	91 0.6×	316 2.3×	221 1.8×	160 1.3×	26 0.3×	58	683
Neil J. Calkin United States	11	121 0.7×	137 1.0×	79 0.6×	99 0.8×	16 0.2×	48	504

Countries citing papers authored by Hans Delfs

Since Specialization

Citations

This map shows the geographic impact of Hans Delfs's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by Hans Delfs with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Hans Delfs more than expected).

Fields of papers citing papers by Hans Delfs

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Hans Delfs. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by Hans Delfs. The network helps show where Hans Delfs may publish in the future.

Co-authorship network of co-authors of Hans Delfs

This figure shows the co-authorship network connecting the top 25 collaborators of Hans Delfs. A scholar is included among the top collaborators of Hans Delfs based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with Hans Delfs. Hans Delfs is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

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16 of 16 papers shown

Delfs, Hans, et al.. (2016). 3D modeling of selected assets, security zones and conduits.. GI-Jahrestagung. 571–580. 2 indexed citations

Delfs, Hans & Helmut Knebl. (2015). Introduction to Cryptography. Digital Access to Libraries (Université catholique de Louvain (UCL), l'Université de Namur (UNamur) and the Université Saint-Louis (USL-B)). 28 indexed citations

Delfs, Hans & Helmut Knebl. (2007). Introduction to Cryptography: Principles and Applications (Information Security and Cryptography). 21 indexed citations

Delfs, Hans & Helmut Knebl. (2007). Introduction to Cryptography. Digital Access to Libraries (Université catholique de Louvain (UCL), l'Université de Namur (UNamur) and the Université Saint-Louis (USL-B)). 78 indexed citations

Delfs, Hans & Helmut Knebl. (2002). Introduction to Cryptography. 112 indexed citations

Delfs, Hans, et al.. (1991). TOROS - A System Integrating Object and Rule-Oriented Programming in a C/UNIX Environment.. 12. 207–216.

Delfs, Hans. (1991). Homology of Locally Semialgebraic Spaces. Lecture notes in mathematics. 10 indexed citations

Delfs, Hans. (1985). The homotopy axiom in semialgebraic cohomology.. Journal für die reine und angewandte Mathematik (Crelles Journal). 1985(355). 108–128. 9 indexed citations

Delfs, Hans & Manfred Knebusch. (1985). Locally Semialgebraic Spaces. Lecture notes in mathematics. 55 indexed citations

10.

Delfs, Hans & Manfred Knebusch. (1984). Separation, retractions and homotopy extension in semialgebraic spaces. Pacific Journal of Mathematics. 114(1). 47–71. 40 indexed citations

11.

Delfs, Hans & Manfred Knebusch. (1984). An introduction to locally semialgebraic spaces. Rocky Mountain Journal of Mathematics. 14(4). 11 indexed citations

12.

Delfs, Hans. (1984). Semi algebraic Borel-Moore-homology. Rocky Mountain Journal of Mathematics. 14(4). 1 indexed citations

13.

Delfs, Hans & Manfred Knebusch. (1984). Basic homotopy theory of locally semialgebraic spaces. Rocky Mountain Journal of Mathematics. 14(4). 1 indexed citations

14.

Delfs, Hans & Manfred Knebusch. (1982). On the homology of algebraic varieties over real closed fields.. Journal für die reine und angewandte Mathematik (Crelles Journal). 1982(335). 122–163. 26 indexed citations

15.

Delfs, Hans & Manfred Knebusch. (1981). Semialgebraic topology over a real closed field I: Paths and components in the set of rational points of an algebraic variety. Mathematische Zeitschrift. 177(1). 107–129. 17 indexed citations

16.

Delfs, Hans & Manfred Knebusch. (1981). Semialgebraic topology over a real closed field II: Basic theory of semialgebraic spaces. Mathematische Zeitschrift. 178(2). 175–213. 49 indexed citations

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

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