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  1. ExtravagantDreams

    Intro. to Differential Equations

    ... 2 3 4
    Jul 3, 2012
    95
    151,919
    Replies: 95
    5
  1. cg78ithaca

    A Generalization of hypergeometric type differential equation

    Jun 18, 2018 at 1:24 PM
    0
    102
    Replies: 0
    0
  2. CE Adamson

    A ODE from Geometry Problem

    Jun 17, 2018 at 10:39 PM
    4
    213
    Replies: 4
    1
  3. Mr Davis 97

    I SHM and the sign of k

    Jun 15, 2018 at 1:29 AM
    2
    192
    Replies: 2
    0
  4. robinegberts

    A Asymptotic solutions to a differential equation

    Jun 13, 2018 at 2:50 PM
    1
    166
    Replies: 1
    0
  5. morenopo2012

    I Heat equation plus a constant

    Jun 13, 2018 at 9:33 AM
    1
    139
    Replies: 1
    0
  6. K Murty

    I Using complex numbers or phasor transform to solve O.D.E's

    Jun 1, 2018
    3
    432
    Replies: 3
    2
  7. mertcan

    A Spectral Theorem to Convert PDE into ODE

    May 30, 2018
    3
    459
    Replies: 3
    0
  8. LSMOG

    I Second order ordinary differential equation to a system of first order

    May 26, 2018
    3
    283
    Replies: 3
    0
  9. Riotto

    I Can all differential equations be turned into algebraic equations via the FT?

    May 25, 2018
    1
    178
    Replies: 1
    0
  10. joshmccraney

    A Inverse ODE, Green's Functions, and series solution

    May 19, 2018
    4
    464
    Replies: 4
    2
  11. Gribouille

    A Vector differential equation

    May 17, 2018
    6
    563
    Replies: 6
    1
  12. arehman1289

    A Stefan Problem

    May 8, 2018
    1
    160
    Replies: 1
    0
  13. joshmccraney

    A RK4 on numerical RHS

    May 2, 2018
    5
    430
    Replies: 5
    1
  14. Voq

    I Linear differential equation

    May 1, 2018
    1
    254
    Replies: 1
    1
  15. swampwiz

    I What is term for DEQ that only has terms of a derivative?

    Apr 30, 2018
    4
    208
    Replies: 4
    0
  16. vishnu 73

    Confusion about series solutions to differential equations

    Apr 30, 2018
    10
    659
    Replies: 10
    5
  17. m4r35n357

    I Is this numerical techique for solving ODEs widely known?

    Apr 28, 2018
    1
    295
    Replies: 1
    0
  18. Karagoz

    B What's the difference between 1000e^0.05t and 1000*1.05^t?

    Apr 22, 2018
    5
    305
    Replies: 5
    0
  19. dRic2

    I What does this line mean?

    Apr 18, 2018
    12
    495
    Replies: 12
    4
  20. synMehdi

    A Pontryagin minimum principle with control constraints

    Apr 5, 2018
    8
    578
    Replies: 8
    2
  21. joshmccraney

    A Green's function not self adjoint for self adjoint ODE

    Apr 3, 2018
    1
    417
    Replies: 1
    0
  22. mertcan

    A Runge Kutta finite difference of differential equations

    Apr 3, 2018
    6
    625
    Replies: 6
    0
  23. Christofer Br

    B How to calculate travel time as a function of distance

    Apr 2, 2018
    6
    280
    Replies: 6
    0
  24. Arman777

    I Cauchy-Euler Diff. Eqn

    Apr 2, 2018
    4
    301
    Replies: 4
    0
  25. hunt_mat

    A Stability for a system of nonlinear ODEs

    Mar 27, 2018
    9
    675
    Replies: 9
    0
  26. wmrunner24

    A Intermediate Axis Theorem - Lyapunov's Indirect Method

    Mar 25, 2018
    1
    353
    Replies: 1
    0
  27. Another

    I Laplace's equation

    Mar 21, 2018
    3
    369
    Replies: 3
    0
  28. joshmccraney

    A Solving an ODE Eigenvalue Problem via the Ritz method

    Mar 15, 2018
    1
    446
    Replies: 1
    0
  29. Dubz

    I Cross product?

    Mar 15, 2018
    2
    298
    Replies: 2
    0
  30. Another

    I Laplace's equation in 3 D

    Mar 14, 2018
    5
    325
    Replies: 5
    0
  31. joshmccraney

    A Legendre's ODE

    Mar 7, 2018
    5
    476
    Replies: 5
    3
  32. learn.steadfast

    I Minimizing a non-linear ODE in f, f_t

    Mar 2, 2018
    5
    460
    Replies: 5
    0
  33. Tunalover

    I A common 2nd order ODE from dynamics but...

    Feb 28, 2018
    8
    369
    Replies: 8
    1
  34. Atr cheema

    A How to simplify the solution of the following linear homogeneous ODE?

    Feb 23, 2018
    1
    571
    Replies: 1
    0
  35. Atr cheema

    I How to find a solution to this linear ODE?

    Feb 22, 2018
    4
    529
    Replies: 4
    0
  36. AAli

    I Trying to obtain a 2nd order ODE

    Feb 21, 2018
    6
    538
    Replies: 6
    1
  37. hunt_mat

    A Applying boundary conditions on an almost spherical body

    Feb 21, 2018
    3
    411
    Replies: 3
    0
  38. SemM

    A Solve a non-linear ODE of third order

    Feb 20, 2018
    5
    427
    Replies: 5
    2
  39. hugo_faurand

    B Calculate the expression of the antiderivative

    Feb 19, 2018
    9
    407
    Replies: 9
    0
  40. joshmccraney

    A Green's Function and Variation of Parameters

    Feb 13, 2018
    1
    425
    Replies: 1
    0
  41. BWV

    I Neural Networks vs Traditional Numerical Methods

    Feb 12, 2018
    2
    384
    Replies: 2
    0
  42. JTC

    A Causality in differential equations

    Feb 10, 2018
    3
    421
    Replies: 3
    1
  43. Hologram0110

    A Numerical solution techniques for 6th order PDE's

    Feb 3, 2018
    1
    377
    Replies: 1
    0
  44. SirVuk

    I What is the propagation speed of a diffusion

    Jan 27, 2018
    4
    699
    Replies: 4
    0
  45. Dor

    A Numerical solution for a two dimensional 3rd order nonlinear diff. eq.

    Jan 22, 2018
    1
    585
    Replies: 1
    0
  46. solanojedi

    A Heat equation on infinite domain

    Jan 20, 2018
    3
    436
    Replies: 3
    0
  47. solanojedi

    A Wave equation in free space

    Jan 18, 2018
    17
    716
    Replies: 17
    0
  48. Mzzed

    I Boundary Conditions for System of PDEs

    Jan 18, 2018
    1
    333
    Replies: 1
    1
  49. joshmccraney

    A Solving linear 2nd order IVP non-constant coefficient

    Jan 14, 2018
    15
    605
    Replies: 15
    3
  50. Ali Baig

    I Complex Fourier Series

    Jan 11, 2018
    2
    460
    Replies: 2
    0
  51. JTC

    A Newmark-Beta vs Predictor Corrector

    Jan 11, 2018
    2
    501
    Replies: 2
    0
  52. Krikri

    A Green's Function ODE BVP

    Jan 9, 2018
    3
    407
    Replies: 3
    0
  53. Ali Baig

    I Classification of First Order Linear Partial Differential Eq

    Jan 5, 2018
    1
    443
    Replies: 1
    1
  54. Mzzed

    I Method for solving gradient of a vector

    Jan 4, 2018
    5
    390
    Replies: 5
    3
  55. ondine4

    I Ode using Fourier Transform

    Jan 2, 2018
    6
    531
    Replies: 6
    5
  56. goggles31

    I How to find the transfer function of xy, xy' etc?

    Dec 30, 2017
    1
    425
    Replies: 1
    0
  57. fahraynk

    A Can Newton's method work with an approximated integral

    Dec 29, 2017
    6
    505
    Replies: 6
    2
  58. Joao

    B Wave equation, psi with dots and things like that...

    Dec 29, 2017
    5
    288
    Replies: 5
    3
  59. JTC

    I Using Complex Numbers to find the solutions (simple Q.)

    Dec 29, 2017
    3
    326
    Replies: 3
    1
  60. grilo

    Nonhomogeneous ODE with Dirac delta

    Dec 26, 2017
    1
    2,138
    Replies: 1
    0
  61. dongsh2

    A How to calculate confluent Heun functions numerically?

    Dec 25, 2017
    1
    466
    Replies: 1
    0
  62. big dream

    A Difficult partial differential Problem

    Dec 24, 2017
    2
    510
    Replies: 2
    2
  63. Tio Barnabe

    I Solving for constants in a differential equation

    Dec 17, 2017
    3
    536
    Replies: 3
    1
  64. toumbous

    A Spheroidal Wave Equation

    Dec 15, 2017
    1
    369
    Replies: 1
    0
  65. themagiciant95

    I Intuition behind Cauchy–Riemann equations

    Dec 15, 2017
    12
    676
    Replies: 12
    3
  66. joshmccraney

    A Matched Asymptotic Expansion and stretching variables

    Dec 11, 2017
    1
    296
    Replies: 1
    0
  67. stockzahn

    A Laplace Equation for an annular geometry with different BC

    Dec 11, 2017
    7
    444
    Replies: 7
    2
  68. highflyyer

    A Solving a PDE in four variables without separation of variables

    Dec 11, 2017
    4
    372
    Replies: 4
    2
  69. smmr89

    A Finite Difference solver for 2D Elasticity equations

    Dec 10, 2017
    3
    899
    Replies: 3
    0
  70. SeM

    I Initial conditions for an ODE

    Dec 8, 2017
    10
    461
    Replies: 10
    3
  71. dRic2

    I Non-constant coefficient

    Nov 30, 2017
    19
    604
    Replies: 19
    4
  72. SeM

    I Convert complex ODE to matrix form

    Nov 27, 2017
    2
    446
    Replies: 2
    0
  73. SeM

    I Norm of a Functional and wavefunction analysis

    Nov 27, 2017
    3
    514
    Replies: 3
    1
  74. knockout_artist

    B A function in an ode.

    Nov 26, 2017
    2
    383
    Replies: 2
    0
  75. Alexander350

    B Solving a differential equation with a unit vector in it

    Nov 26, 2017
    13
    522
    Replies: 13
    0
  76. Jordan0332

    I Volume of a Frustum

    Nov 26, 2017
    1
    521
    Replies: 1
    0
  77. Mr. Fizzix

    I Physics? Setting up PDE for air resistance at high velocity

    Nov 25, 2017
    2
    332
    Replies: 2
    1
  78. fog37

    I Homogeneous Wave Equation and its Solutions

    Nov 24, 2017
    4
    742
    Replies: 4
    0
  79. joshmccraney

    A PDE in Spherical Coordinates

    Nov 21, 2017
    11
    449
    Replies: 11
    1
  80. Atr cheema

    A Fourier Transform for 3rd kind of boundary conditions?

    Nov 20, 2017
    1
    343
    Replies: 1
    0
  81. Pcmath

    I 2nd order ODE numerical solution

    Nov 20, 2017
    9
    542
    Replies: 9
    1
  82. k.udhay

    I Need a help in solving an equation (probably differentiation

    Nov 20, 2017
    2
    347
    Replies: 2
    0
  83. lmal

    A Convergence order of central finite difference scheme

    Nov 10, 2017
    7
    681
    Replies: 7
    1
  84. Atr cheema

    A Understanding dummy variable in solution of 1D heat equation

    Nov 7, 2017
    6
    558
    Replies: 6
    1
  85. joshmccraney

    A Finite Difference

    Nov 1, 2017
    3
    621
    Replies: 3
    0
  86. Getterdog

    I Symmetry in differential equations

    Oct 29, 2017
    3
    532
    Replies: 3
    0
  87. James Brady

    A Damped Thermal Oscillations

    Oct 27, 2017
    5
    601
    Replies: 5
    0
  88. LauwranceGilbert

    I Higher order derivatives rules

    Oct 26, 2017
    2
    568
    Replies: 2
    0
  89. joshmccraney

    I Three different integration schemes

    Oct 26, 2017
    1
    424
    Replies: 1
    1
  90. Sashatgu

    A How to find the partial derivatives of a composite function

    Oct 19, 2017
    1
    698
    Replies: 1
    0
  91. joshmccraney

    A Better way to find Finite Difference

    Oct 18, 2017
    12
    683
    Replies: 12
    1
  92. Philosophaie

    I Partial Vector Derivative

    Oct 15, 2017
    3
    443
    Replies: 3
    0
  93. Telemachus

    I Resolution of a PDE with second order Runge-Kutta

    Oct 8, 2017
    6
    875
    Replies: 6
    3
  94. Hypatio

    A Finite difference of fourth order partial differential

    Oct 8, 2017
    6
    770
    Replies: 6
    0
  95. Aatifa

    A Phase space plot

    Oct 7, 2017
    4
    655
    Replies: 4
    3
  96. ChanYoung Park

    I Real life application of Euler's method/numerical method

    Oct 6, 2017
    9
    3,142
    Replies: 9
    1
  97. chimay

    A Laplace equation- variable domain

    Oct 1, 2017
    3
    749
    Replies: 3
    0
  98. Telemachus

    I Heat equation with variable coefficients

    Sep 13, 2017
    15
    835
    Replies: 15
    10
  99. Runei

    I Complex representation of wave function

    Sep 11, 2017
    2
    741
    Replies: 2
    0
  100. chimay

    A Cylindrical Poisson equation for semiconductors

    Sep 8, 2017
    4
    571
    Replies: 4
    0
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Join in expert discussion on differential equation topics. Differential equations are an equation involving derivatives of a function or functions. Help in solving ODE and PDE problems. Homework help is available.