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A user with 79 edits. Account created on 4 January 2006.

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20:1120:11, 5 October 2006 diff hist −2 m Partial differential equation →Introduction: Fix misprint.

18:4918:49, 29 June 2006 diff hist +1,265 Calculus of variations →Eigenvalue problems: added higher dimensional case. ~~~~
16:2516:25, 29 June 2006 diff hist +3,577 Calculus of variations added eigenvalue problems. ~~~~

17:5217:52, 28 June 2006 diff hist 0 m Calculus of variations →Reference books: correctged Gelfand-Fomin. ~~~~
17:5017:50, 28 June 2006 diff hist +96 m Calculus of variations →Reference books: added ref to Courant-Hilbert. ~~~~
17:4817:48, 28 June 2006 diff hist +3,290 Calculus of variations →Functions of several variables: added more examples. ~~~~
17:1417:14, 28 June 2006 diff hist +4,616 User:Donludwig/Sandbox No edit summary

17:0417:04, 26 June 2006 diff hist +183 m Calculus of variations added some references. ~~~~
16:5716:57, 26 June 2006 diff hist +2,840 Calculus of variations add Dirichlet's principle. ~~~~

19:1519:15, 23 June 2006 diff hist −1,536 User:Donludwig/Sandbox No edit summary
16:3616:36, 23 June 2006 diff hist +1,522 Calculus of variations added section on action principle. ~~~~

18:2318:23, 15 June 2006 diff hist +519 Calculus of variations clarify connection between Fermat's principle and wave equation. ~~~~
18:1918:19, 15 June 2006 diff hist −1,677 User:Donludwig/Sandbox No edit summary

16:5916:59, 14 June 2006 diff hist +97 User talk:Oleg Alexandrov No edit summary
16:5416:54, 14 June 2006 diff hist +693 User talk:Oleg Alexandrov No edit summary

17:5517:55, 11 May 2006 diff hist +27 m Calculus of variations clarify Snell's law. ~~~~
17:4917:49, 11 May 2006 diff hist +4,724 Calculus of variations added Fermat's principle. ~~~~
17:4617:46, 11 May 2006 diff hist +3,022 User:Donludwig/Sandbox No edit summary

00:3100:31, 9 May 2006 diff hist +85 User:Donludwig/Sandbox No edit summary

23:5923:59, 8 May 2006 diff hist −903 User:Donludwig/Sandbox No edit summary
18:2018:20, 8 May 2006 diff hist +3,638 Calculus of variations added Euler-Lagrange equation. ~~~~
15:5815:58, 8 May 2006 diff hist −361 User:Donludwig/Sandbox No edit summary

17:0917:09, 12 April 2006 diff hist +6,537 N First-order partial differential equation firs try at first order PDE theory. ~~~~

20:3720:37, 11 April 2006 diff hist +1,067 User:Donludwig/Sandbox No edit summary

23:0723:07, 4 April 2006 diff hist +873 Wave equation added 2D solution. ~~~~
16:1316:13, 4 April 2006 diff hist −2 m Wave equation →Solution of a general initial-value problem: Fix factor. ~~~~
16:0516:05, 4 April 2006 diff hist 0 m Wave equation →Solution of a general initial-value problem: Fix scale factor c. ~~~~

17:2217:22, 3 April 2006 diff hist +428 Wave equation added references
17:1817:18, 3 April 2006 diff hist +3,824 Wave equation added 3D initial value problem. ~~~~

18:0318:03, 31 March 2006 diff hist +217 Talk:Wave equation No edit summary
18:0118:01, 31 March 2006 diff hist +2,494 Wave equation rearranged material and added something on eigenvalue problems. ~~~~
00:4900:49, 31 March 2006 diff hist +1,455 User:Donludwig/Sandbox No edit summary

23:1423:14, 28 March 2006 diff hist +4,506 Laplace's equation add some 3D theory. ~~~~

18:0618:06, 24 March 2006 diff hist +283 m Helmholtz equation →References: add refs
18:0418:04, 24 March 2006 diff hist −402 m Helmholtz equation →Three-dimensional solutions: Add some refs. ~~~
17:1517:15, 24 March 2006 diff hist −153 m Helmholtz equation fix notation of 2D case. ~~~~
17:1317:13, 24 March 2006 diff hist +4,963 m User:Donludwig/Sandbox fix notation for 2D case. ~~~~

18:4318:43, 23 March 2006 diff hist +1,908 Helmholtz equation →Solving the Helmholtz equation using separation of variables: added 2D theory. ~~~~
17:3517:35, 23 March 2006 diff hist +76 m Partial differential equation →References: added Jost reference. ~~~~
17:3417:34, 23 March 2006 diff hist +2,421 Partial differential equation →Methods to solve PDEs: added material on initial-boundary problems. ~~~~

17:5417:54, 22 March 2006 diff hist +856 User:Donludwig/Sandbox No edit summary
16:4316:43, 22 March 2006 diff hist +4 m Partial differential equation Fixed level of headings in 2D Laplace eq ~~~~
16:4016:40, 22 March 2006 diff hist −3,132 Partial differential equation shortened 2D Laplace story by moving to Laplace article. Added Poisson integral. ~~~~
00:3600:36, 22 March 2006 diff hist −686 User:Donludwig/Sandbox No edit summary
00:2300:23, 22 March 2006 diff hist +4,885 Laplace's equation wrote an account for 2D case. ~~~~

18:0018:00, 20 March 2006 diff hist −3,796 Partial differential equation shorten account of wave equation; vibrating string to go to wave equation entry. ~~~~
17:3017:30, 20 March 2006 diff hist −2,825 Partial differential equation shortened treatment of heat equation by referring elsewhere. ~~~~

21:4021:40, 15 March 2006 diff hist −2 m Partial differential equation correct reference to Monge cone. ~~~~
17:5717:57, 15 March 2006 diff hist +2,710 Partial differential equation add classification for first-order systems ~~~~
17:5417:54, 15 March 2006 diff hist −511 User:Donludwig/Sandbox No edit summary

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