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Abraham Lempel (Hebrew: אברהם למפל, born 10 February 1936) is an Israeli computer scientist and one of the fathers of the LZ family of lossless data compression algorithms.
Lempel was born on 10 February 1936 in Lwów, Poland (now Lviv, Ukraine).[1] He studied at Technion - Israel Institute of Technology, and received a B.Sc. in 1963, M.Sc. in 1965, and D.Sc. in 1967. Since 1977 he has held the title of full professor. Lempel is now a professor emeritus in 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.
He is the recipient of the 1998 Golden Jubilee Award for Technological Innovation from the IEEE Information Theory Society;[2] and the 2007 IEEE Richard W. Hamming Medal, for "pioneering work in data compression, especially the Lempel-Ziv algorithm".[3]
Lempel founded HP Labs—Israel in 1994, and served as its director until October 2007.
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.
Ukraine, Ukrainian language, Kiev, Lviv Oblast, Poland
Kiev, Russia, Sevastopol, Ukrainian language, Ukrainians
Cryptography, Artificial intelligence, Software engineering, Science, Machine learning
Jerusalem, West Bank, Hebrew language, Tel Aviv, Syria
Israel, Computer science, Information theory, Tiberias, Technion – Israel Institute of Technology
Machine learning, Association for Computing Machinery, Gene, Electronics, Cryptography
Cryptography, Stanford University, Martin Hellman, United States, Sun Microsystems
Computer science, University of California, Berkeley, Stanford University, Public Key Cryptography, Martin Hellman
Nobel Prize in chemistry, Albert Einstein, Nobel Laureates, Dan Shechtman, Google