# Christian Lengauer

> Ph.D. University of Toronto 1982

**Wikidata**: [Q102130480](https://www.wikidata.org/wiki/Q102130480)  
**Source**: https://4ort.xyz/entity/christian-lengauer

## Summary
Christian Lengauer is a prominent computer scientist and academic who has held faculty positions at major institutions in the United States, the United Kingdom, and Germany. He is best known for his long-standing tenure as a Full Professor at the University of Passau and his significant role in mentoring a generation of researchers in software engineering and computer science.

## Biography
- **Education:** Ph.D. in Computer Science, University of Toronto (1982)
- **Known for:** Academic leadership in computer science and the doctoral supervision of numerous influential researchers.
- **Employer(s):** University of Passau (Full Professor), University of Edinburgh (Lecturer), University of Texas at Austin (Assistant Professor).
- **Field(s):** Computer Science

## Contributions
Christian Lengauer’s professional contributions are centered on his extensive career in academic research and higher education. After completing his doctoral studies at the University of Toronto in 1982 under the supervision of Eric Hehner, Lengauer established a global academic footprint. He began his career as an Assistant Professor at the University of Texas at Austin (1982–1989) before serving as a Lecturer at the University of Edinburgh (1990–1992). In April 1992, he accepted a position as a Full Professor at the University of Passau, where he has spent the majority of his career.

While his specific research papers are indexed across major platforms such as DBLP, IEEE Xplore, and the ACM Digital Library, his most concrete legacy is his contribution to the "Mathematics Genealogy" of computer science. He has supervised a wide array of doctoral students who have gone on to make their own significant marks on the industry and academia. These students include Sergei Gorlatch, Martin Griebl, and Sven Apel, the latter of whom is a Professor for Software Engineering at Saarland University. Lengauer’s work is recognized by major professional bodies, evidenced by his unique identifiers in the Mathematical Reviews (MR) and Google Scholar databases.

## FAQs
### Q: Where did Christian Lengauer receive his Ph.D.?
A: Christian Lengauer earned his Doctor of Philosophy from the University of Toronto in 1982. His doctoral advisor was the Canadian computer scientist Eric Hehner.

### Q: Which universities has Christian Lengauer worked for?
A: He has held faculty roles at three major institutions: the University of Texas at Austin (Assistant Professor), the University of Edinburgh (Lecturer), and the University of Passau (Full Professor).

### Q: Who are some of Christian Lengauer's notable students?
A: Lengauer has advised many doctoral students, including Sven Apel, Sergei Gorlatch, Michael Barnett, Jingling Xue, and Martin Griebl, many of whom have become professors and researchers in software engineering.

## Why They Matter
Christian Lengauer’s significance lies in his role as a foundational figure in the international computer science community. By holding influential positions in three different countries, he helped bridge the academic traditions of North America and Europe during a period of rapid growth in the field of software engineering. His career at the University of Passau, spanning several decades, helped establish the institution as a node for high-level computer science research.

The lasting impact of his work is best measured through his academic descendants. Through the mentorship of over ten doctoral students—many of whom, like Sven Apel, have achieved international recognition—Lengauer has influenced the development of modern software engineering practices and theory. His presence in major academic databases like the ACM Digital Library and IEEE Xplore underscores a lifetime of participation in the formalization and advancement of computer science as a rigorous academic discipline. Without his contributions to doctoral training, the academic lineage of several key subfields in software engineering would be significantly diminished.

## Notable For
*   **Academic Longevity:** Served as a Full Professor at the University of Passau for over three decades, starting in 1992.
*   **International Faculty Roles:** Held teaching and research positions at the University of Texas at Austin and the University of Edinburgh.
*   **Prolific Doctoral Advisor:** Successfully supervised at least 11 doctoral students, including prominent researchers like Sven Apel and Sergei Gorlatch.
*   **Distinguished Lineage:** He is the brother of Thomas Lengauer, another noted figure in the scientific community.

## Body
### Academic Appointments
Christian Lengauer’s career is characterized by a steady progression through prestigious international institutions:
*   **University of Texas at Austin:** Served as an Assistant Professor from September 1, 1982, to December 31, 1989.
*   **University of Edinburgh:** Served as a Lecturer from January 1, 1990, to March 31, 1992.
*   **University of Passau:** Appointed as a Full Professor on April 1, 1992.

### Doctoral Supervision and Mentorship
According to the Mathematics Genealogy Project and academic records, Lengauer has been a prolific advisor. His doctoral students include:
*   **Sven Apel:** Now a Professor at Saarland University.
*   **Sergei Gorlatch:** A notable researcher in parallel computing.
*   **Martin Griebl, Armin Größlinger, and Peter Faber:** Contributors to the field of loop optimization and parallelization.
*   **Other Students:** Chua-Huang Huang, Michael Barnett, Jingling Xue, Ulrike Lechner, Christoph A. Herrmann, and Nils Ellmenreich.

### Research Identifiers
Lengauer’s contributions to the field are documented under several major academic identifiers:
*   **DBLP:** l/CLengauer
*   **IEEE Xplore:** 37312615300
*   **ACM Digital Library:** 81100085132
*   **Google Scholar:** He31yBEAAAAJ
*   **Mathematics Genealogy Project:** 102247

### Personal and Professional Connections
Lengauer is the sibling of Thomas Lengauer. His own academic foundation was established under Eric Hehner at the University of Toronto, where he completed his Ph.D. in 1982.

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## References

1. Mathematics Genealogy Project
2. [ORCID Public Data File 2021](https://pub.orcid.org/v3.0/0000-0002-2717-3417/employment/3111099)
3. [ORCID Public Data File 2021](https://pub.orcid.org/v3.0/0000-0002-2717-3417/employment/3111094)
4. [ORCID Public Data File 2021](https://pub.orcid.org/v3.0/0000-0002-2717-3417/employment/3111087)