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Forum: Differential Equations

Ordinary and Partial Differential Equations, Linear and Nonlinear; also Integral and Integro-Differential Equations

  1. Sticky Thread Sticky Threads

  2. Sticky Thread Bessel Functions Cheat Sheet

    Started by Ackbach, September 11th, 2015 10:13
    • Replies: 0
    • Views: 891
    September 11th, 2015, 10:13 Go to last post
  3. Sticky Thread Stürm-Liouville Problem Cheat Sheet

    Started by Ackbach, September 4th, 2015 10:10
    • Replies: 0
    • Views: 799
    September 4th, 2015, 10:10 Go to last post
  4. Sticky Thread Status of DE Tutorial

    Started by Chris L T521, December 26th, 2012 03:16
    • Replies: 4
    • Views: 1,885
    July 10th, 2013, 04:41 Go to last post
  1. Normal Thread Normal Threads

  2. [SOLVED] Help with Froebenious method

    Started by ognik, January 13th, 2016 21:47
    2alpha, 2a_j+1k+j+1, a_j+2k+j+2k+j+1, a_lambda, sum
    • Replies: 1
    • Views: 399
    January 15th, 2016, 18:20 Go to last post
  3. [SOLVED] Another Frobenius method ODE

    Started by ognik, January 14th, 2016 19:07
    .fk, a_j, forbenius, ode
    • Replies: 0
    • Views: 283
    January 14th, 2016, 19:07 Go to last post
  4. Why do we use this relation?

    Started by evinda, January 14th, 2016 13:12
    $sigma, $xt$, $yt$, geq, leq
    • Replies: 0
    • Views: 301
    January 14th, 2016, 13:12 Go to last post
  5. How do we deduce that there is such a point?

    Started by evinda, January 14th, 2016 09:42
    $yx0$, leq, show, solution, x_0$
    • Replies: 2
    • Views: 381
    January 14th, 2016, 11:24 Go to last post
  6. [SOLVED] Please check Eulers ODE

    Started by ognik, January 12th, 2016 17:49
    $x^p, n^2, ode, substituting, x^p
    • Replies: 1
    • Views: 337
    January 13th, 2016, 01:19 Go to last post
  7. [SOLVED] Find Ansatz for this ODE (3.5.15)

    Started by ognik, January 12th, 2016 18:53
    ansatz, find, good, solution, worked
    • Replies: 2
    • Views: 395
    January 12th, 2016, 21:25 Go to last post
  8. Irregular singularity

    Started by ognik, January 12th, 2016 19:44
    book, infty$, irregular, putting, singularity
    • Replies: 0
    • Views: 297
    January 12th, 2016, 19:44 Go to last post
  9. [SOLVED] Please check this particular solution excercise

    Started by ognik, January 11th, 2016 18:33
    $y_p, ansatz, cos, omega, sin
    • Replies: 3
    • Views: 479
    January 12th, 2016, 17:47 Go to last post
  10. [SOLVED] Help with ODE initial conditions

    Started by ognik, January 11th, 2016 18:12
    book, conditions, eqtn, initial, ode
    • Replies: 2
    • Views: 401
    January 11th, 2016, 23:05 Go to last post
  11. [SOLVED] Please check this ODE (1)

    Started by ognik, January 10th, 2016 21:13
    cos, c_1, c_2, left, sqrt2$
    • Replies: 7
    • Views: 604
    January 11th, 2016, 23:04 Go to last post
  12. Please check Laguerre's eqtn solution

    Started by ognik, December 19th, 2015 15:50
    eqtn, e^-x, factor, laguerres, self-adjoint
    • Replies: 5
    • Views: 554
    January 9th, 2016, 17:23 Go to last post
  13. [SOLVED] a^2 u_xx=u_t

    Started by karush, January 5th, 2016 22:07
    complicated, differential, equation, returned, ti-nspire
    • Replies: 2
    • Views: 471
    January 6th, 2016, 16:31 Go to last post
  14. [SOLVED] a^2 U_xx = u_tt

    Started by karush, January 2nd, 2016 19:16
    $$u_1leftx, atright$$, constant, tright=sinleftlambda, u_xx
    • Replies: 5
    • Views: 474
    January 6th, 2016, 00:25 Go to last post
  15. Differential equation y/(x^2+y^2)

    Started by Nikolas7, January 1st, 2016 11:30
    • Replies: 4
    • Views: 443
    January 2nd, 2016, 11:58 Go to last post
  16. solve the differential equation

    Started by Nikolas7, December 20th, 2015 04:24
    уу^primeprime=2ху^prime^2, differential, equation, solve
    • Replies: 6
    • Views: 514
    January 1st, 2016, 11:23 Go to last post
  17. [SOLVED] U_xx + U_yy = 0

    Started by karush, December 31st, 2015 19:00
    $$fracdu^2d^2, coshy, u_yy, x+fracdu^2d^2, y=0$$
    • Replies: 5
    • Views: 519
    December 31st, 2015, 23:39 Go to last post
  18. [SOLVED] Order and linear or nonlinear

    Started by karush, December 18th, 2015 18:23
    • Replies: 6
    • Views: 972
    December 27th, 2015, 17:15 Go to last post
  19. [SOLVED] write ODE solution as reals

    Started by ognik, December 15th, 2015 23:30
    c_1cos3x, euler, isin3x, ode, solution
    • Replies: 4
    • Views: 570
    December 20th, 2015, 17:02 Go to last post
  20. Identifying Critical Points

    Started by ineedhelpnow, December 15th, 2015 12:49
    critical, improper, node, point, proper
    • Replies: 3
    • Views: 418
    December 15th, 2015, 21:41 Go to last post
  21. [SOLVED] Higher power constant coefficiants ODEs

    Started by ognik, December 15th, 2015 17:19
    divides, finding, r-1, roots, terms
    • Replies: 2
    • Views: 432
    December 15th, 2015, 17:51 Go to last post
  22. Critical Points, Stability

    Started by ineedhelpnow, December 15th, 2015 13:29
    awesome, final, hours, question, quickly
    • Replies: 7
    • Views: 465
    December 15th, 2015, 17:49 Go to last post
  23. method of undetermined coefficients

    Started by ineedhelpnow, December 14th, 2015 22:07
    coefficients, final, method, questions, undetermined
    • Replies: 9
    • Views: 606
    December 15th, 2015, 03:06 Go to last post
  24. variation of parameters

    Started by ineedhelpnow, December 15th, 2015 01:00
    include, latex, parameters, steps, variation
    • Replies: 2
    • Views: 341
    December 15th, 2015, 02:02 Go to last post
  25. [SOLVED] Determine order and if the equation is linear

    Started by karush, December 14th, 2015 20:42
    determine, equation, linear, order, problems
    • Replies: 0
    • Views: 277
    December 14th, 2015, 20:42 Go to last post
  26. Does this stand also for f?

    Started by mathmari, December 12th, 2015 17:53
    differential, equation, mid, root, solution
    • Replies: 0
    • Views: 300
    December 12th, 2015, 17:53 Go to last post
  27. [SOLVED] Solutions in a ring

    Started by mathmari, October 23rd, 2015 11:56
    $$axz+bxz=yz$$, $r$, $y$, ring, solutions
    • Replies: 3
    • Views: 413
    December 12th, 2015, 12:29 Go to last post
  28. Particular solution

    Started by mathmari, December 10th, 2015 14:15
    a_mx^m$$, equation, homogeneous, multiplicity, solution
    • Replies: 0
    • Views: 307
    December 10th, 2015, 14:15 Go to last post
  29. Non-zero solutions

    Started by mathmari, December 10th, 2015 11:17
    equation, homogeneous, linear, ring, solution
    • Replies: 0
    • Views: 314
    December 10th, 2015, 11:17 Go to last post
  30. System of differential equations

    Started by mathmari, November 25th, 2015 13:13
    $ly=f$, differential, equation, solution, system
    • Replies: 5
    • Views: 633
    December 7th, 2015, 07:46 Go to last post
  31. Uniqueness

    Started by mathmari, November 13th, 2015 15:26
    $lambda_1, dots, eigenvalues, equation, solution
    • Replies: 1
    • Views: 432
    December 6th, 2015, 15:26 Go to last post

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