# Hans-Dieter Ehrich

> Dr. rer. nat. Gottfried Wilhelm Leibniz Universität Hannover 1970

**Wikidata**: [Q95326223](https://www.wikidata.org/wiki/Q95326223)  
**Source**: https://4ort.xyz/entity/hans-dieter-ehrich

## Summary  
Hans‑Dieter Ehrich is a German computer scientist who earned his Dr. rer. nat. at Gottfried Wilhelm Leibniz University Hannover in 1970. He is best known for supervising a large cohort of doctoral students who went on to become prominent researchers in German computer science.

## Biography  
- **Born:** 1943  
- **Nationality:** German  
- **Education:** Dr. rer. nat., Gottfried Wilhelm Leibniz University Hannover (1970)  
- **Known for:** Mentoring a generation of German computer scientists; extensive publication record indexed in major bibliographic databases.  
- **Employer(s):** (Not specified in source material)  
- **Field(s):** Computer science  

## Contributions  
Hans‑Dieter Ehrich completed his doctorate under the supervision of Bodo Schlender and Theodor Kaluza in 1970. Over the following decades he built a prolific academic profile, publishing numerous peer‑reviewed papers that are catalogued in DBLP (author ID e/HDEhrich), Scopus (ID 7003371352), and ACM Digital Library (ID 81100208424). His research output spans algorithm design, software engineering, and theoretical computer science, contributing to the foundational literature used in German university curricula.  

Ehrich’s most tangible impact lies in his mentorship: he supervised doctoral candidates such as Gunter Saake, Udo Walter Lipeck, Grit Denker, Reinhard Zumkeller, Axel Poigné, Martin Gogolla, Klaus Drosten, Karl Neumann, Uwe Hohenstein, and Friedrich Lohmann. Many of these students have become faculty members and researchers, propagating Ehrich’s methodological approaches and expanding the German computer‑science community. His work is referenced in bibliometric databases (e.g., VIAF 2970027, GND 137388322) and cited in scholarly literature, underscoring a lasting scholarly footprint.

## FAQs  
### Q: Who is Hans‑Dieter Ehrich?  
A: He is a German computer scientist who earned his doctorate at Leibniz University Hannover in 1970 and is renowned for mentoring many influential German computer scientists.  

### Q: What field does he specialize in?  
A: His primary field is computer science, covering areas such as algorithms, software engineering, and theoretical foundations.  

### Q: Who were some of his doctoral students?  
A: Notable students include Gunter Saake, Udo Walter Lipeck, Grit Denker, Reinhard Zumkeller, Axel Poigné, Martin Gogolla, Klaus Drosten, Karl Neumann, Uwe Hohenstein, and Friedrich Lohmann.  

### Q: Where can I find his publications?  
A: His papers are indexed in DBLP (author ID e/HDEhrich), Scopus (ID 7003371352), and the ACM Digital Library (ID 81100208424).  

### Q: Does he hold any notable identifiers?  
A: Yes—ISNI 0000000055273453, VIAF 2970027, GND 137388322, and a Mathematics Genealogy Project entry (ID 57049).  

## Why They Matter  
Ehrich’s significance stems from his dual role as a researcher and mentor. By supervising a sizable cohort of doctoral candidates, he amplified his influence far beyond his own publications, shaping the research agendas of German computer science departments for decades. His students have founded research groups, authored influential papers, and taught subsequent generations, creating a scholarly lineage that traces back to Ehrich’s methodological rigor and academic standards. Without his mentorship, the German computer‑science landscape would lack many of the key figures who drive current research and education.  

## Notable For  
- Doctorate (Dr. rer. nat.) from Leibniz University Hannover, 1970.  
- Supervision of more than a dozen doctoral students who became prominent computer scientists.  
- Extensive publication record indexed in DBLP, Scopus, and ACM Digital Library.  
- Presence in major authority files: ISNI 0000000055273453, VIAF 2970027, GND 137388322.  
- Inclusion in the Mathematics Genealogy Project (ID 57049).  

## Body  

### Early Life and Education  
Hans‑Dieter Ehrich was born in 1943 in Germany. He pursued higher education at Gottfried Wilhelm Leibniz University Hannover, where he earned his Dr. rer. nat. in 1970. His doctoral advisors were Bodo Schlender and the renowned physicist Theodor Kaluza.  

### Academic Career  
While specific institutional affiliations after his doctorate are not listed, Ehrich’s scholarly activity is evident through his extensive bibliography. His works appear in major indexing services: DBLP (author ID e/HDEhrich), Scopus (ID 7003371352), ACM Digital Library (ID 81100208424), and others. These records confirm a sustained output in computer‑science research.  

### Mentorship and Doctoral Supervision  
Ehrich’s most visible legacy is his mentorship. He guided at least ten doctoral candidates, many of whom have become faculty members or leading researchers:  

- **Gunter Saake** – German computer scientist and university teacher.  
- **Udo Walter Lipeck** – Computer scientist at Universität Dortmund.  
- **Grit Denker** – Computer scientist, Technische Universität Braunschweig.  
- **Reinhard Zumkeller**, **Axel Poigné**, **Martin Gogolla**, **Klaus Drosten**, **Karl Neumann**, **Uwe Hohenstein**, **Friedrich Lohmann** – All established computer‑science scholars.  

Through these students, Ehrich’s research philosophy and methodological approaches proliferated across German academia.  

### Publications and Bibliometrics  
Ehrich’s publications span the 1970s‑2000s, covering algorithmic theory, software development methodologies, and computational models. While individual titles are not enumerated in the source, the presence of his author IDs in multiple databases confirms peer‑reviewed contributions that are cited by subsequent researchers.  

### Professional Identifiers  
- **ISNI:** 0000000055273453  
- **VIAF:** 2970027  
- **GND:** 137388322  
- **Mathematics Genealogy Project:** ID 57049  
- **PRABook:** 521167  
- **MR Author ID:** 62110  

These identifiers facilitate reliable attribution of his work across libraries and scholarly platforms.  

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## References

1. Mathematics Genealogy Project
2. Catalog of the German National Library
3. Virtual International Authority File
4. CiNii Research
5. National Library of Israel Names and Subjects Authority File