Abraham Lempel
Israeli computer scientist (1936–2023)
Abraham Lempel | |
|---|---|
 Lempel in 2007 | |
| Born | (1936-02-10)10 February 1936 Lwów, Second Polish Republic (now Lviv, Ukraine) |
| Died | 4 February 2023(2023-02-04) (aged 86) |
| Known for | LZ77 and LZ78 compression algorithms |
| Awards | Paris Kanellakis Award (1997) IEEE Richard W. Hamming Medal (2007) |
| Scientific career | |
| Fields | Information theory |
| Institutions | Technion - Israel Institute of Technology |
Abraham Lempel (Hebrew: אברהם למפל; 10 February 1936 – 4 February 2023)[1] was an Israeli computer scientist and one of the fathers of the LZ family of lossless data compression algorithms.
Biography
Lempel was born on 10 February 1936 in Lwów, Poland (now Lviv, Ukraine).[2] He studied at Technion - Israel Institute of Technology, and received a B.Sc. in 1963, an M.Sc. in 1965, and a D.Sc. in 1967. Since 1977 he held the title of full professor, and was a professor emeritus at Technion.
His historically-important works start with the presentation of the LZ77 algorithm in a paper entitled "A Universal Algorithm for Sequential Data Compression" in the IEEE Transactions on Information Theory (May 1977), co-authored by Jacob Ziv.
Lempel was the recipient of the 1998 Golden Jubilee Award for Technological Innovation from the IEEE Information Theory Society;[3] and the 2007 IEEE Richard W. Hamming Medal for "pioneering work in data compression, especially the Lempel-Ziv algorithm".[4]
Lempel founded HP Labs—Israel in 1994, and served as its director until October 2007.
Lempel died on 4 February 2023, at age 86.
Works
The LZ77 and LZ78 algorithms authored by Lempel and Jacob Ziv have led to a number of derivative works, including the Lempel–Ziv–Welch algorithm, used in the GIF image format, and the Lempel-Ziv-Markov chain algorithm, used in the 7-Zip and xz compressors. The algorithms have also been used as originally published in formats such as DEFLATE, used in the PNG image format.
Bibliography
- Jacob Ziv, Abraham Lempel (May 1977). "A Universal Algorithm for Sequential Data Compression". IEEE Transactions on Information Theory. 23 (3): 337–343. CiteSeerX 10.1.1.118.8921. doi:10.1109/TIT.1977.1055714. S2CID 9267632.
See also
References
- ^ מת פרופ' אברהם למפל – האיש ששינה את מדעי המחשב (in Hebrew)
- ^ "IEEE Transactions On Computers: Contributors". Institute of Electrical and Electronics Engineers. December 1970. doi:10.1109/T-C.1970.222867.
{{cite journal}}: Cite journal requires|journal=(help) - ^ "Golden Jubilee Awards for Technological Innovation". IEEE Information Theory Society. Retrieved 30 October 2014.
- ^ "IEEE Richard W. Hamming Medal Recipients" (PDF). IEEE. Retrieved 30 October 2014.
External links
- Abraham Lempel – GHN: IEEE Global History Network
- Abraham Lempel at DBLP Bibliography Server
- Technion: Computer Science Department: Prof. Abraham Lempel Archived 24 November 2020 at the Wayback Machine
- "Abraham Lempel: Senior HP Fellow". Archived from the original on 6 July 2008. Retrieved 9 June 2009.
- Abraham Lempel at the Mathematics Genealogy Project
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Winners of the Paris Kanellakis Theory and Practice Award
- Adleman, Diffie, Hellman, Merkle, Rivest, Shamir (1996)
- Lempel, Ziv (1997)
- Bryant, Clarke, Emerson, McMillan (1998)
- Sleator, Tarjan (1999)
- Karmarkar (2000)
- Myers (2001)
- Franaszek (2002)
- Miller, Rabin, Solovay, Strassen (2003)
- Freund, Schapire (2004)
- Holzmann, Kurshan, Vardi, Wolper (2005)
- Brayton (2006)
- Buchberger (2007)
- Cortes, Vapnik (2008)
- Bellare, Rogaway (2009)
- Mehlhorn (2010)
- Samet (2011)
- Broder, Charikar, Indyk (2012)
- Blumofe, Leiserson (2013)
- Demmel (2014)
- Luby (2015)
- Fiat, Naor (2016)
- Shenker (2017)
- Pevzner (2018)
- Alon, Gibbons, Matias, Szegedy (2019)
- Azar, Broder, Karlin, Mitzenmacher, Upfal (2020)
- Blum, Dinur, Dwork, McSherry, Nissim, Smith (2021)
- Burrows, Ferragina, Manzini (2022)
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