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  1. ExtravagantDreams

    Intro. to Differential Equations

    ... 3 4 5
    Jul 3, 2012
    95
    152,517
    Replies: 95
    5
  1. fahraynk

    I Derivation of Lax-Wendroff finite volume scheme

    Aug 19, 2018 at 2:27 AM
    0
    68
    Replies: 0
    0
  2. fahraynk

    I Solving PDE's with chebychev FFT

    Aug 5, 2018
    11
    450
    Replies: 11
    2
  3. osilmag

    I Chaos Theory Constants

    Jul 27, 2018
    4
    557
    Replies: 4
    6
  4. HumanistEngineer

    A 1D Convection Diffusion Equation - Inlet Mixing Effect

    Jul 27, 2018
    7
    291
    Replies: 7
    1
  5. nrqed

    A Very simple question about KP hierarchy

    Jul 14, 2018
    1
    544
    Replies: 1
    0
  6. Dimitris Papadim

    I Applications of second order linear non homogenous ordinary differential equations

    Jul 12, 2018
    1
    258
    Replies: 1
    2
  7. K Murty

    I RL circuit with polynomial forcing function solution (units)

    Jul 11, 2018
    6
    244
    Replies: 6
    7
  8. Roboto

    A Runge Kutta - units

    Jul 10, 2018
    16
    609
    Replies: 16
    3
  9. piggees

    I General solution to a 2nd order differential equation

    Jul 8, 2018
    4
    263
    Replies: 4
    2
  10. LagrangeEuler

    I Overdamping condition

    Jul 1, 2018
    3
    212
    Replies: 3
    0
  11. cg78ithaca

    A Generalization of hypergeometric type differential equation

    Jun 23, 2018
    2
    528
    Replies: 2
    0
  12. Phylosopher

    I Is the exponential function, the only function where y'=y?

    Jun 23, 2018
    11
    302
    Replies: 11
    9
  13. CE Adamson

    A ODE from Geometry Problem

    Jun 22, 2018
    6
    486
    Replies: 6
    4
  14. Mr Davis 97

    I SHM and the sign of k

    Jun 15, 2018
    2
    303
    Replies: 2
    0
  15. robinegberts

    A Asymptotic solutions to a differential equation

    Jun 13, 2018
    1
    232
    Replies: 1
    0
  16. morenopo2012

    I Heat equation plus a constant

    Jun 13, 2018
    1
    246
    Replies: 1
    0
  17. K Murty

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

    Jun 1, 2018
    3
    513
    Replies: 3
    2
  18. mertcan

    A Spectral Theorem to Convert PDE into ODE

    May 30, 2018
    3
    559
    Replies: 3
    0
  19. LSMOG

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

    May 26, 2018
    3
    371
    Replies: 3
    0
  20. Riotto

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

    May 25, 2018
    1
    275
    Replies: 1
    0
  21. joshmccraney

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

    May 19, 2018
    4
    545
    Replies: 4
    2
  22. Gribouille

    A Vector differential equation

    May 17, 2018
    6
    645
    Replies: 6
    1
  23. arehman1289

    A Stefan Problem

    May 8, 2018
    1
    226
    Replies: 1
    0
  24. joshmccraney

    A RK4 on numerical RHS

    May 2, 2018
    5
    508
    Replies: 5
    1
  25. Voq

    I Linear differential equation

    May 1, 2018
    1
    336
    Replies: 1
    1
  26. swampwiz

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

    Apr 30, 2018
    4
    249
    Replies: 4
    0
  27. vishnu 73

    Confusion about series solutions to differential equations

    Apr 30, 2018
    10
    752
    Replies: 10
    5
  28. m4r35n357

    I Is this numerical techique for solving ODEs widely known?

    Apr 28, 2018
    1
    356
    Replies: 1
    0
  29. Karagoz

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

    Apr 22, 2018
    5
    383
    Replies: 5
    0
  30. dRic2

    I What does this line mean?

    Apr 18, 2018
    12
    544
    Replies: 12
    4
  31. synMehdi

    A Pontryagin minimum principle with control constraints

    Apr 5, 2018
    8
    624
    Replies: 8
    2
  32. joshmccraney

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

    Apr 3, 2018
    1
    463
    Replies: 1
    0
  33. mertcan

    A Runge Kutta finite difference of differential equations

    Apr 3, 2018
    6
    702
    Replies: 6
    0
  34. Christofer Br

    B How to calculate travel time as a function of distance

    Apr 2, 2018
    6
    357
    Replies: 6
    0
  35. Arman777

    I Cauchy-Euler Diff. Eqn

    Apr 2, 2018
    4
    393
    Replies: 4
    0
  36. hunt_mat

    A Stability for a system of nonlinear ODEs

    Mar 27, 2018
    9
    758
    Replies: 9
    0
  37. wmrunner24

    A Intermediate Axis Theorem - Lyapunov's Indirect Method

    Mar 25, 2018
    1
    407
    Replies: 1
    0
  38. Another

    I Laplace's equation

    Mar 21, 2018
    3
    461
    Replies: 3
    0
  39. joshmccraney

    A Solving an ODE Eigenvalue Problem via the Ritz method

    Mar 15, 2018
    1
    512
    Replies: 1
    0
  40. Dubz

    I Cross product?

    Mar 15, 2018
    2
    368
    Replies: 2
    0
  41. Another

    I Laplace's equation in 3 D

    Mar 14, 2018
    5
    397
    Replies: 5
    0
  42. joshmccraney

    A Legendre's ODE

    Mar 7, 2018
    5
    550
    Replies: 5
    3
  43. learn.steadfast

    I Minimizing a non-linear ODE in f, f_t

    Mar 2, 2018
    5
    504
    Replies: 5
    0
  44. Tunalover

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

    Feb 28, 2018
    8
    442
    Replies: 8
    1
  45. Atr cheema

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

    Feb 23, 2018
    1
    639
    Replies: 1
    0
  46. Atr cheema

    I How to find a solution to this linear ODE?

    Feb 22, 2018
    4
    577
    Replies: 4
    0
  47. AAli

    I Trying to obtain a 2nd order ODE

    Feb 21, 2018
    6
    614
    Replies: 6
    1
  48. hunt_mat

    A Applying boundary conditions on an almost spherical body

    Feb 21, 2018
    3
    479
    Replies: 3
    0
  49. SemM

    A Solve a non-linear ODE of third order

    Feb 20, 2018
    5
    498
    Replies: 5
    2
  50. hugo_faurand

    B Calculate the expression of the antiderivative

    Feb 19, 2018
    9
    476
    Replies: 9
    0
  51. joshmccraney

    A Green's Function and Variation of Parameters

    Feb 13, 2018
    1
    478
    Replies: 1
    0
  52. BWV

    I Neural Networks vs Traditional Numerical Methods

    Feb 12, 2018
    2
    453
    Replies: 2
    0
  53. JTC

    A Causality in differential equations

    Feb 10, 2018
    3
    501
    Replies: 3
    1
  54. Hologram0110

    A Numerical solution techniques for 6th order PDE's

    Feb 3, 2018
    1
    419
    Replies: 1
    0
  55. SirVuk

    I What is the propagation speed of a diffusion

    Jan 27, 2018
    4
    788
    Replies: 4
    1
  56. Dor

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

    Jan 22, 2018
    1
    652
    Replies: 1
    0
  57. solanojedi

    A Heat equation on infinite domain

    Jan 20, 2018
    3
    524
    Replies: 3
    0
  58. solanojedi

    A Wave equation in free space

    Jan 18, 2018
    17
    777
    Replies: 17
    0
  59. Mzzed

    I Boundary Conditions for System of PDEs

    Jan 18, 2018
    1
    407
    Replies: 1
    1
  60. joshmccraney

    A Solving linear 2nd order IVP non-constant coefficient

    Jan 14, 2018
    15
    697
    Replies: 15
    3
  61. Ali Baig

    I Complex Fourier Series

    Jan 11, 2018
    2
    528
    Replies: 2
    0
  62. JTC

    A Newmark-Beta vs Predictor Corrector

    Jan 11, 2018
    2
    588
    Replies: 2
    0
  63. Krikri

    A Green's Function ODE BVP

    Jan 9, 2018
    3
    463
    Replies: 3
    0
  64. Ali Baig

    I Classification of First Order Linear Partial Differential Eq

    Jan 5, 2018
    1
    515
    Replies: 1
    1
  65. Mzzed

    I Method for solving gradient of a vector

    Jan 4, 2018
    5
    459
    Replies: 5
    3
  66. ondine4

    I Ode using Fourier Transform

    Jan 2, 2018
    6
    620
    Replies: 6
    5
  67. goggles31

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

    Dec 30, 2017
    1
    480
    Replies: 1
    0
  68. fahraynk

    A Can Newton's method work with an approximated integral

    Dec 29, 2017
    6
    565
    Replies: 6
    2
  69. Joao

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

    Dec 29, 2017
    5
    333
    Replies: 5
    3
  70. JTC

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

    Dec 29, 2017
    3
    377
    Replies: 3
    1
  71. grilo

    Nonhomogeneous ODE with Dirac delta

    Dec 26, 2017
    1
    2,189
    Replies: 1
    0
  72. dongsh2

    A How to calculate confluent Heun functions numerically?

    Dec 25, 2017
    1
    543
    Replies: 1
    0
  73. big dream

    A Difficult partial differential Problem

    Dec 24, 2017
    2
    562
    Replies: 2
    2
  74. Tio Barnabe

    I Solving for constants in a differential equation

    Dec 17, 2017
    3
    583
    Replies: 3
    1
  75. toumbous

    A Spheroidal Wave Equation

    Dec 15, 2017
    1
    412
    Replies: 1
    0
  76. themagiciant95

    I Intuition behind Cauchy–Riemann equations

    Dec 15, 2017
    12
    753
    Replies: 12
    3
  77. joshmccraney

    A Matched Asymptotic Expansion and stretching variables

    Dec 11, 2017
    1
    346
    Replies: 1
    0
  78. stockzahn

    A Laplace Equation for an annular geometry with different BC

    Dec 11, 2017
    7
    497
    Replies: 7
    2
  79. highflyyer

    A Solving a PDE in four variables without separation of variables

    Dec 11, 2017
    4
    436
    Replies: 4
    2
  80. smmr89

    A Finite Difference solver for 2D Elasticity equations

    Dec 10, 2017
    3
    961
    Replies: 3
    0
  81. SeM

    I Initial conditions for an ODE

    Dec 8, 2017
    10
    522
    Replies: 10
    3
  82. dRic2

    I Non-constant coefficient

    Nov 30, 2017
    19
    657
    Replies: 19
    4
  83. SeM

    I Convert complex ODE to matrix form

    Nov 27, 2017
    2
    501
    Replies: 2
    0
  84. SeM

    I Norm of a Functional and wavefunction analysis

    Nov 27, 2017
    3
    583
    Replies: 3
    1
  85. knockout_artist

    B A function in an ode.

    Nov 26, 2017
    2
    431
    Replies: 2
    0
  86. Alexander350

    B Solving a differential equation with a unit vector in it

    Nov 26, 2017
    13
    585
    Replies: 13
    0
  87. Jordan0332

    I Volume of a Frustum

    Nov 26, 2017
    1
    565
    Replies: 1
    0
  88. Mr. Fizzix

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

    Nov 25, 2017
    2
    375
    Replies: 2
    1
  89. fog37

    I Homogeneous Wave Equation and its Solutions

    Nov 24, 2017
    4
    805
    Replies: 4
    0
  90. joshmccraney

    A PDE in Spherical Coordinates

    Nov 21, 2017
    11
    503
    Replies: 11
    1
  91. Atr cheema

    A Fourier Transform for 3rd kind of boundary conditions?

    Nov 20, 2017
    1
    399
    Replies: 1
    0
  92. Pcmath

    I 2nd order ODE numerical solution

    Nov 20, 2017
    9
    606
    Replies: 9
    1
  93. k.udhay

    I Need a help in solving an equation (probably differentiation

    Nov 20, 2017
    2
    409
    Replies: 2
    0
  94. lmal

    A Convergence order of central finite difference scheme

    Nov 10, 2017
    7
    737
    Replies: 7
    1
  95. Atr cheema

    A Understanding dummy variable in solution of 1D heat equation

    Nov 7, 2017
    6
    602
    Replies: 6
    1
  96. joshmccraney

    A Finite Difference

    Nov 1, 2017
    3
    669
    Replies: 3
    0
  97. Getterdog

    I Symmetry in differential equations

    Oct 29, 2017
    3
    585
    Replies: 3
    0
  98. James Brady

    A Damped Thermal Oscillations

    Oct 27, 2017
    5
    649
    Replies: 5
    0
  99. LauwranceGilbert

    I Higher order derivatives rules

    Oct 26, 2017
    2
    631
    Replies: 2
    0
  100. joshmccraney

    I Three different integration schemes

    Oct 26, 2017
    1
    465
    Replies: 1
    1
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