Sigurd Angenent




Sigurd Bernardus Angenent (born 1960)[1] is a Dutch-born mathematician and professor at the University of Wisconsin–Madison. Angenent works on partial differential equations and dynamical systems, with his recent research focusing on heat equation and diffusion equation.[2][3] The Angenent torus and Angenent ovals are special solutions to the mean curvature flow published by Angenent in 1992;[4] the Angenent torus remains self-similar as it collapses to a point under the flow, and the Angenent ovals are the only compact ancient solutions other than circles for the curve-shortening flow.[5]


Angenent was raised in Haarlem, the Netherlands.[6] He obtained his PhD in Mathematics from Leiden University in 1986.[7] In 1996 Angenent became a correspondent of the Royal Netherlands Academy of Arts and Sciences.[2]


At the University of Wisconsin–Madison he is director of the Undergraduate Mathematics Program. After becoming frustrated with high prices of textbooks and poor quality he wrote and made available his own notes for all classes.[8]



References





  1. ^ "Angenent, Sigurd Bernardus, 1960-". Virtual International Authority File. Retrieved 5 April 2016..mw-parser-output cite.citation{font-style:inherit}.mw-parser-output q{quotes:"""""""'""'"}.mw-parser-output code.cs1-code{color:inherit;background:inherit;border:inherit;padding:inherit}.mw-parser-output .cs1-lock-free a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/6/65/Lock-green.svg/9px-Lock-green.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .cs1-lock-limited a,.mw-parser-output .cs1-lock-registration a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/d/d6/Lock-gray-alt-2.svg/9px-Lock-gray-alt-2.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .cs1-lock-subscription a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/a/aa/Lock-red-alt-2.svg/9px-Lock-red-alt-2.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .cs1-subscription,.mw-parser-output .cs1-registration{color:#555}.mw-parser-output .cs1-subscription span,.mw-parser-output .cs1-registration span{border-bottom:1px dotted;cursor:help}.mw-parser-output .cs1-hidden-error{display:none;font-size:100%}.mw-parser-output .cs1-visible-error{font-size:100%}.mw-parser-output .cs1-subscription,.mw-parser-output .cs1-registration,.mw-parser-output .cs1-format{font-size:95%}.mw-parser-output .cs1-kern-left,.mw-parser-output .cs1-kern-wl-left{padding-left:0.2em}.mw-parser-output .cs1-kern-right,.mw-parser-output .cs1-kern-wl-right{padding-right:0.2em}


  2. ^ ab "Sigurd Angenent". Royal Netherlands Academy of Arts and Sciences. Retrieved 16 August 2015.


  3. ^ "Sigurd Angenent". University of Wisconsin–Madison. Retrieved 16 August 2015.


  4. ^ Angenent, Sigurd B. (1992), "Shrinking doughnuts" (PDF), Nonlinear diffusion equations and their equilibrium states, 3 (Gregynog, 1989), Progress in Nonlinear Differential Equations and their Applications, 7, Boston, MA: Birkhäuser, pp. 21–38, MR 1167827.


  5. ^ Daskalopoulos, Panagiota; Hamilton, Richard; Sesum, Natasa (2010), "Classification of compact ancient solutions to the curve shortening flow", Journal of Differential Geometry, 84 (3): 455–464, arXiv:0806.1757, Bibcode:2008arXiv0806.1757D, MR 2669361.


  6. ^ "Personal page". University of Wisconsin–Madison. Retrieved 16 August 2015.


  7. ^ "Researcher: Sigurd Angenent". Wisconsin Discovery Portal. 20 February 2015. Retrieved 16 August 2015.


  8. ^ "Ten to receive Distinguished Teaching Awards" (in Dutch). University of Wisconsin–Madison. 1 May 2014. Retrieved 16 August 2015.




External links




  • Profile at the Mathematics Genealogy Project

  • Profile at University of Wisconsin–Madison















Comments

Post a Comment

Popular posts from this blog

Information security

Image
This article is part of a series on Information security Related security categories Internet security Cyberwarfare Computer security Mobile security Network security Threats Computer crime Vulnerability Eavesdropping Malware Spyware Ransomware Trojans Viruses Worms Rootkits Bootkits Keyloggers Screen scrapers Exploits Backdoors Logic bombs Payloads Denial of service Defenses Computer access control Application security Antivirus software Secure coding Secure by default Secure by design Secure operating systems Authentication Multi-factor authentication Authorization Data-centric security Encryption Firewall Intrusion detection system Mobile secure gateway Runtime application self-protection (RASP) v t e Information security , sometimes shortened to InfoSec , is the practice of preventing unauthorized access, use, disclosure, disruption, modification, inspection, recording or destruction of information. Th
Read more

Lambak Kiri

Image
For Lambak Kiri public housing area, see Lambak Kiri Landless Indigenous Citizens' Housing Scheme. Village in Brunei-Muara, Brunei Lambak Kiri Village Location in Brunei Coordinates: 4°59′26″N 114°57′04″E  /  4.990472°N 114.951114°E  / 4.990472; 114.951114 Coordinates: 4°59′26″N 114°57′04″E  /  4.990472°N 114.951114°E  / 4.990472; 114.951114 Country Brunei District Brunei-Muara Mukim Berakas A Government  • Village head Hamdani Omar Postcode BB1214 Lambak Kiri is a populated place in Brunei-Muara District, Brunei. It is officially a village subdivision under Berakas A, a mukim in the district. Lambak Kiri may also refer to the greater area which includes the Lambak Kiri public housing area of the Landless Indigenous Citizens' Housing Scheme (Malay: Skim Tanah Kurnia Rakyat Jati ), although the latter is a separate subdivision. Contents 1 Name 2 Administration 3 See also 4 References Name
Read more

Farm Security Administration

Image
Farm Security Administration Farm Security Administration logo Agency overview Formed September 1, 1937  ( 1937-09-01 ) Preceding agencies Resettlement Administration Federal Emergency Relief Administration Dissolved 1946 Superseding agency Farmers Home Administration Key documents Farm Security Act Bankhead-Jones Farm Tenant Act The Farm Security Administration ( FSA ) was a New Deal agency created in 1937 to combat rural poverty during the Great Depression in the United States. It succeeded the Resettlement Administration (1935–1937). [1] The FSA stressed "rural rehabilitation" efforts to improve the lifestyle of sharecroppers, tenants, very poor landowning farmers, and a program to purchase submarginal land owned by poor farmers and resettle them in group farms on land more suitable for efficient farming. Critics, including the Farm Bureau, strongly opposed the FSA as an experiment in collectivizing agriculture—that is, in bringing
Read more