Yom Tov Lipman Lipkin

Yom Tov Lipman Lipkin (Hebrew: יום טוב ליפמן ליפקין‎‎, Russian: Липман Израилевич Липкин; 1846 – February 21 [O.S. February 9] 1876) was a Lithuanian Jewish mathematician and inventor. He was the youngest son of notable Rabbi Yisroel Salanter, the father of the Musar movement.

Lipkin is best known for the Peaucellier–Lipkin linkage which was partly named after him. The device also known as "Lipkin parallelogram". Lipkin discovered the linkage independent from Peaucellier in 1871. A model of Lipkin's invention was exhibited at the exposition at Vienna in 1873, and was later secured from the inventor by the Museum of the Institute of Engineers of Ways of Communication, St. Petersburg.

Lipkin was born in Salantai, department of Kovno, in 1846. He became interested in science and mathematics since childhood. Not knowing any European language, he had to derive his information from Hebrew books alone. He later mastered German and French and went to study at University of Königsberg at the age of 17. He received a Ph.D. degree at Jena University with a thesis titled "Ueber die Räumlichen Strophoiden." He then moved to St. Petersburg, to work at University of St. Petersburg and continue his studies under Pafnuty Chebyshev. Soon afterwards he died in 1876 from smallpox.

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