Henry Wallman

Henry (Hank) Wallman (1915 [http://www.chalmers.se/sections/om_chalmers/akademiska_hogtidlig/promotion/chalmersmedaljen/henry-wallman Biography of Wallman] at the Chalmers University of Technology (in Swedish).] – 1992) was an American mathematician, known for his work in lattice theory, dimension theory, topology, and electronic circuit design.

Wallman received his Ph.D. in mathematics from Princeton University in 1937, under the supervision of Solomon Lefschetz [mathgenealogy|name=Henry Wallman|id=7829.] and became a faculty member at the Massachusetts Institute of Technology, where he was associated with the Radiation Laboratory. During World War II he did classified work at MIT, possibly involving radar.The Princeton Mathematics Community in the 1930s, interviews with Albert Tucker, transcripts [http://www.princeton.edu/~mudd/finding_aids/mathoral/pmc33.htm 33] , [http://www.princeton.edu/~mudd/finding_aids/mathoral/pmc36.htm 36] , and [http://www.princeton.edu/~mudd/finding_aids/mathoral/pmc41.htm 41] .] In 1948, he left MIT to become a professor of electrotechnics at the Chalmers University of Technology in Gothenburg, Sweden, which awarded him the Chalmers medal in 1980 [ [http://www.chalmers.se/en/sections/about_chalmers/academic-ceremonies/conferment-doctoral/chalmers-medal Chalmers medalists] , Chalmers University of Technology.] and where he eventually retired. In 1950 he was elected as a foreign member to the Swedish Royal Academy. [citation|title=Notes|journal=Bulletin of the American Mathematical Society|year=1950|volume=56|issue=2|pages=212–215|doi=10.1090/S0002-9904-1950-09396-3; citation|first=Edith R.|last=Schneckenburger|title=News and Notices|journal=American Mathematical Monthly|volume=57|issue=6|year=1950|pages=433–435|url=http://www.jstor.org/view/00029890/di991341/99p0029z/0.]

The disjunction property of Wallman is named after Wallman, as is the Wallman compactification, and he co-authored an important monograph on dimension theory with Witold Hurewicz. [citation|title=Dimension Theory|first1=W.|last1=Hurewicz|first2=H.|last2=Wallman|publisher=Princeton University Press|year=1941. Reviews: citation|title=Dimension|last=Menger|first=Karl|authorlink=Karl Menger|journal=Science|volume=95|issue=2474|pages=554–556|url=http://www.jstor.org/view/00368075/ap992474/99a00170/0; mathscinet|id=0006493 (reviewed by Hassler Whitney); citation|title=Dimension theory|last=Smith|first=P. A.|journal=Bulletin of the American Mathematical Society|volume=48|year=1942|pages=641–642|doi=10.1090/S0002-9904-1942-07723-8.] Wallman was also a radio enthusiast, and in the postwar period co-authored a book comprehensively documenting what was known at the time about vacuum tube amplification technology, [citation | last1 = Valley
first1 = George E. Jr. | last2=Wallman | first2= Henry | title=Vacuum Tube Amplifiers|series=MIT Radiation Laboratory Series 18 | publisher=McGraw-Hill. | location=New York |date=1948. Reviews: citation|last=Reid|first=J. G., Jr.|title=Vacuum tube amplifiers|journal=Science|volume=109|issue=283|page=412|url=http://www.jstor.org/view/00368075/ap992834/99a00200/0|year=1949; citation|last=Giacoletto|first=L. J.|title=Institute News and Radio Notes|journal=Proceedings of the I.R.E.|volume=37|issue=8|year=1949|page=907|url=http://ieeexplore.ieee.org/xpls/abs_all.jsp?isnumber=35798&arnumber=1698111&count=28&index=14; citation|last=Frankland|first=Scott|year=1998|title=Vacuum tube electronics: Reviews of the major texts|publisher=Perkins Electro-Acoustical Research Laboratory|url=http://www.pearl-hifi.com/06_Lit_Archive/01_Audio_Notes/Frankland_Tube_Elect.pdf.] including new developments such as showing how the central limit theorem could be used to describe the rise time of cascaded circuits. At Chalmers, Wallman helped build the Electronic Differential Analyser, an early example of an analog computer, [citation|title=Early analog computers in Sweden—with examples from Chalmers University of Technology and the Swedish Aerospace Industry|first=Magnus|last=Johansson|journal=IEEE Annals of the History of Computing|volume=18|issue=4|year=1996|pages=27–33|url=http://ieeexplore.ieee.org/iel4/85/11673/00539913.pdf.] and performed pioneering research in biomedical engineering combining video displays with X-ray imaging. [ [http://www.chalmers.se/biocenter/EN/about_us/process-developing/background-to-evaluation/downloadFile/file/Background_to_Evaluation_en.pdf?nocache=1172736753.09 Chalmers Bioscience Program background material 2004] , Gunnar Bjursell and Catharina Hiort.]

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