Helmut Friedrich

5.7k total citations
85 papers, 2.8k citations indexed

About

Helmut Friedrich is a scholar working on Astronomy and Astrophysics, Nuclear and High Energy Physics and Applied Mathematics. According to data from OpenAlex, Helmut Friedrich has authored 85 papers receiving a total of 2.8k indexed citations (citations by other indexed papers that have themselves been cited), including 51 papers in Astronomy and Astrophysics, 42 papers in Nuclear and High Energy Physics and 17 papers in Applied Mathematics. Recurrent topics in Helmut Friedrich's work include Cosmology and Gravitation Theories (45 papers), Black Holes and Theoretical Physics (42 papers) and Advanced Mathematical Physics Problems (13 papers). Helmut Friedrich is often cited by papers focused on Cosmology and Gravitation Theories (45 papers), Black Holes and Theoretical Physics (42 papers) and Advanced Mathematical Physics Problems (13 papers). Helmut Friedrich collaborates with scholars based in Germany, Hungary and United States. Helmut Friedrich's co-authors include Gabriel Nagy, Piotr T. Chruściel, John M. Stewart, Lars Andersson, István Rácz, Robert M. Wald, Sergio Dain, Bernd Schmidt, Piotr Bizoń and Jörg Frauendiener and has published in prestigious journals such as Phytochemistry, Communications in Mathematical Physics and Solid State Communications.

In The Last Decade

Helmut Friedrich

82 papers receiving 2.6k citations

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
Helmut Friedrich Germany 28 2.3k 2.2k 546 452 423 85 2.8k
Gernot Neugebauer Germany 19 741 0.3× 635 0.3× 693 1.3× 76 0.2× 66 0.2× 43 1.3k
Igor Rodnianski United States 28 837 0.4× 924 0.4× 527 1.0× 784 1.7× 1.5k 3.5× 65 2.2k
Claude Duhr Switzerland 42 1.3k 0.6× 6.7k 3.1× 343 0.6× 181 0.4× 227 0.5× 105 7.2k
Stefan Theisen Germany 35 1.9k 0.8× 3.5k 1.6× 1.3k 2.4× 59 0.1× 265 0.6× 103 3.8k
Murat Günaydin United States 35 2.1k 0.9× 3.4k 1.6× 2.1k 3.9× 354 0.8× 408 1.0× 102 4.0k
Àngel Jorba Spain 26 1.3k 0.6× 225 0.1× 1.2k 2.2× 59 0.1× 307 0.7× 103 2.4k
Stephan Stieberger Germany 38 1.9k 0.8× 3.5k 1.6× 1.1k 2.0× 58 0.1× 224 0.5× 86 3.7k
Henri Epstein France 20 366 0.2× 490 0.2× 483 0.9× 163 0.4× 369 0.9× 42 1.3k
Piotr Bizoń Poland 24 1.6k 0.7× 1.7k 0.8× 605 1.1× 148 0.3× 368 0.9× 81 2.1k
Pietro Fré Italy 28 1.5k 0.6× 2.4k 1.1× 1.4k 2.6× 106 0.2× 254 0.6× 158 2.5k

Countries citing papers authored by Helmut Friedrich

Since Specialization
Citations

This map shows the geographic impact of Helmut Friedrich'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 Helmut Friedrich with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Helmut Friedrich more than expected).

Fields of papers citing papers by Helmut Friedrich

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Helmut Friedrich. 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 Helmut Friedrich. The network helps show where Helmut Friedrich may publish in the future.

Co-authorship network of co-authors of Helmut Friedrich

This figure shows the co-authorship network connecting the top 25 collaborators of Helmut Friedrich. A scholar is included among the top collaborators of Helmut Friedrich 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 Helmut Friedrich. Helmut Friedrich is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

20 of 20 papers shown
1.
2.
Friedrich, Helmut. (2024). Cosmologies with positive λ: hierarchies of future behaviour. Philosophical Transactions of the Royal Society A Mathematical Physical and Engineering Sciences. 382(2267). 20230044–20230044. 1 indexed citations
3.
Friedrich, Helmut. (2013). Non-zero rest-mass fields in cyclic cosmologies. arXiv (Cornell University). 2 indexed citations
4.
Frauendiener, Jörg & Helmut Friedrich. (2010). The conformal structure of space-time : geometry, analysis, numerics. Springer eBooks. 7 indexed citations
5.
Chruściel, Piotr T., et al.. (2004). The Einstein Equations and the Large Scale Behavior of Gravitational Fields. Birkhäuser Basel eBooks. 77 indexed citations
6.
Chruściel, Piotr T. & Helmut Friedrich. (2004). The Einstein equations and the large scale behavior of gravitational fields : 50 years of the Cauchy problem in general relativity. CERN Document Server (European Organization for Nuclear Research). 15 indexed citations
7.
Friedrich, Helmut. (2003). Radiative gravitational fields and asymptotically static or stationary initial data. arXiv (Cornell University). 1 indexed citations
8.
Friedrich, Helmut. (1998). Einstein's Equation and Geometric Asymptotics. MPG.PuRe (Max Planck Society). 153. 2 indexed citations
9.
Friedrich, Helmut. (1988). On static and radiative space-times. Communications in Mathematical Physics. 119(1). 51–73. 47 indexed citations
10.
Friedrich, Helmut & Bernd Schmidt. (1987). Conformal geodesics in general relativity.. 277. 5 indexed citations
11.
Friedrich, Helmut & Bernd Schmidt. (1987). Conformal geodesics in general relativity. Proceedings of the Royal Society of London A Mathematical and Physical Sciences. 414(1846). 171–195. 42 indexed citations
12.
Friedrich, Helmut, et al.. (1984). Flavonoide in Blättern vonJuniperus drupacea. Planta Medica. 50(1). 108–109. 5 indexed citations
13.
Friedrich, Helmut & John M. Stewart. (1983). Characteristic initial data and wavefront singularities in general relativity. Proceedings of the Royal Society of London A Mathematical and Physical Sciences. 385(1789). 345–371. 54 indexed citations
14.
Friedrich, Helmut. (1983). On the existence of asymptotically flat and empty spaces. Lecture notes in physics. 124. 407–419. 1 indexed citations
15.
Stewart, John M. & Helmut Friedrich. (1982). Numerical relativity. I. The characteristic initial value problem. Proceedings of the Royal Society of London A Mathematical and Physical Sciences. 384(1787). 427–454. 31 indexed citations
16.
Friedrich, Helmut. (1982). On the existence of analytic null asymptotically flat solutions of Einstein’s vacuum field equations. Proceedings of the Royal Society of London A Mathematical and Physical Sciences. 381(1781). 361–371. 37 indexed citations
17.
Friedrich, Helmut. (1981). On the regular and the asymptotic characteristic initial value problem for Einstein’s vacuum field equations. Proceedings of the Royal Society of London A Mathematical and Physical Sciences. 375(1761). 169–184. 133 indexed citations
18.
Friedrich, Helmut. (1981). The asymptotic characteristic initial value problem for Einstein’s vacuum field equations as an initial value problem for a first-order quasilinear symmetric hyperbolic system. Proceedings of the Royal Society of London A Mathematical and Physical Sciences. 378(1774). 401–421. 106 indexed citations
19.
Friedrich, Helmut. (1962). Über das Vorkommen von Isorhamnetinglykosiden in den Blüten von Calendula officinalis L. Archiv der Pharmazie. 295(1). 59–66. 5 indexed citations
20.
Friedrich, Helmut. (1962). Untersuchungen über die Isorhamnetinglykoside aus den Blüten von Calendula officinalis L. Archiv der Pharmazie. 295(6). 464–471. 7 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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