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  1. ExtravagantDreams

    Intro. to Differential Equations

    ... 3 4 5
    Jul 3, 2012
    95
    154,259
    Replies: 95
    5
  1. Wledig

    I Continuity of Green's function

    Feb 18, 2019 at 9:08 PM
    9
    1,232
    Replies: 9
    3
  2. m4r35n357

    I Symplectic integrator, non-separable Hamiltonian

    Feb 17, 2019 at 5:04 AM
    3
    1,020
    Replies: 3
    0
  3. barryj

    A Hint as to how to solve an integral differential equation

    Feb 12, 2019
    6
    947
    Replies: 6
    0
  4. Somali_Physicist

    B Fourier transform of a constant

    Feb 10, 2019
    3
    615
    Replies: 3
    1
  5. tse8682

    I Nonlinear Second Order ODE

    Feb 9, 2019
    2
    725
    Replies: 2
    1
  6. jonjacson

    B Why the Fourier series doesn't work to solve any differential equation?

    Feb 7, 2019
    11
    759
    Replies: 11
    2
  7. tse8682

    A Determine PDE Boundary Condition via Analytical solution

    Jan 31, 2019
    1
    759
    Replies: 1
    0
  8. Saim

    I Non-linear Pendulum

    Jan 30, 2019
    5
    789
    Replies: 5
    0
  9. dRic2

    I The stability of a linear hyperbolic problem

    Jan 29, 2019
    0
    319
    Replies: 0
    0
  10. mohammed El-Kady

    A Laplace or Fourier Transform to solve a system of partial differential equations in thermoelasticity

    Jan 27, 2019
    2
    801
    Replies: 2
    0
  11. physics_cosmos

    I Solving the Brachistochrone problem with friction

    Jan 22, 2019
    2
    445
    Replies: 2
    0
  12. dsaun777

    I Derivative of f() as a function of a Laplacian

    Jan 21, 2019
    1
    346
    Replies: 1
    0
  13. Kontilera

    I Which function space do square waves span?

    Jan 16, 2019
    13
    671
    Replies: 13
    4
  14. Elen Sakea

    I Differential Equation Problem

    Dec 29, 2018
    2
    332
    Replies: 2
    3
  15. Hector Triana

    I How to solve an ODE to find its solution

    Dec 27, 2018
    7
    785
    Replies: 7
    2
  16. osilmag

    I Chaos Theory Constants

    Dec 18, 2018
    17
    1,858
    Replies: 17
    19
  17. ohaited

    I How to check chaotic system using Lyapunov

    Dec 15, 2018
    3
    305
    Replies: 3
    3
  18. TachyonLord

    I Where does the exponential function come from in roots?

    Dec 15, 2018
    2
    318
    Replies: 2
    1
  19. joshmccraney

    I Sturm-Liouville Eigenfunctions

    Dec 11, 2018
    1
    354
    Replies: 1
    1
  20. thoraxepi

    I Transfer Function relating momentum and force

    Dec 10, 2018
    2
    271
    Replies: 2
    1
  21. ohaited

    I How to get a Chaos Sequence from this Equation?

    Dec 10, 2018
    14
    497
    Replies: 14
    1
  22. ohaited

    I How to simplify this Equation

    Dec 9, 2018
    5
    348
    Replies: 5
    0
  23. Hector Triana

    A Partial Differential Equation Mathematical Modelling

    Dec 8, 2018
    2
    641
    Replies: 2
    2
  24. ebangosh

    A Differential Equation to Difference Equation

    Dec 3, 2018
    3
    785
    Replies: 3
    0
  25. Zheng_

    I How do you know when to partially differentiate?

    Dec 2, 2018
    1
    302
    Replies: 1
    1
  26. Jarfi

    A Can I linearize this equation?

    Nov 26, 2018
    5
    489
    Replies: 5
    0
  27. md nabil

    A Solving the Laplace equation over a trapezoidal domain

    Nov 26, 2018
    2
    339
    Replies: 2
    1
  28. fog37

    I Chain Rule and acceleration as a function of two variables

    Nov 25, 2018
    9
    436
    Replies: 9
    0
  29. Chromatic_Universe

    I Solving a nonlinear first order differential equation

    Nov 20, 2018
    8
    350
    Replies: 8
    1
  30. papanatas

    I Boundary condition 1D beam

    Nov 13, 2018
    1
    318
    Replies: 1
    0
  31. xdrgnh

    A Need help solving Darboux equation

    Nov 12, 2018
    1
    238
    Replies: 1
    0
  32. joshmccraney

    A Numerics: Wronskian and linear independence

    Nov 12, 2018
    1
    424
    Replies: 1
    0
  33. joshmccraney

    A Rayleigh quotient Eigenvalues for a simple ODE

    Nov 11, 2018
    1
    365
    Replies: 1
    2
  34. MathCreature

    I Sketching simple coupled oscillators

    Nov 4, 2018
    3
    630
    Replies: 3
    1
  35. Philip Land

    I Rewriting ODEs

    Oct 25, 2018
    1
    424
    Replies: 1
    0
  36. Josu Aguirrebeitia

    A Solution form for the following differential equation

    Oct 18, 2018
    2
    422
    Replies: 2
    1
  37. Sam D

    I Y'' + y = 0 solution and recursion relation

    Oct 17, 2018
    3
    400
    Replies: 3
    1
  38. joshmccraney

    A Green's functions issue

    Oct 13, 2018
    1
    518
    Replies: 1
    0
  39. kairama15

    A Gravitational Well Position

    Oct 7, 2018
    3
    269
    Replies: 3
    0
  40. joshmccraney

    A Variation of parameters, Green's functions, Wronskian

    Oct 6, 2018
    1
    298
    Replies: 1
    0
  41. sparkie

    I What exactly is linear dependency? 2nd and 3rd Order Diff EQ

    Oct 2, 2018
    1
    379
    Replies: 1
    1
  42. MathCreature

    I Using a bifurcation diagrams and time dependent parameters

    Sep 30, 2018
    2
    323
    Replies: 2
    0
  43. HumanistEngineer

    A Finite Difference Scheme - Plume Entrainment

    Sep 28, 2018
    3
    611
    Replies: 3
    0
  44. binbagsss

    Mathematical Biology- Neumann BCs, Turing Analysis

    Sep 20, 2018
    1
    307
    Replies: 1
    0
  45. bolly

    A Inverted pendulum car - pedulum will not swing

    Sep 15, 2018
    2
    347
    Replies: 2
    1
  46. joshmccraney

    I Metric for knowing when numerical BC is "good"

    ... 2
    Sep 13, 2018
    25
    1,265
    Replies: 25
    1
  47. Ulver48

    A Taylor expansion for a nonlinear system and Picard Iterations

    Sep 11, 2018
    3
    462
    Replies: 3
    1
  48. piggees

    I General solution to a 2nd-order differential equation

    Sep 9, 2018
    7
    496
    Replies: 7
    2
  49. ChanYoung Park

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

    Sep 7, 2018
    11
    5,697
    Replies: 11
    1
  50. APUGYael

    I Linearity of DE's

    Aug 28, 2018
    8
    274
    Replies: 8
    1
  51. m4r35n357

    I Is this numerical techique for solving ODEs widely known?

    Aug 26, 2018
    3
    689
    Replies: 3
    0
  52. fahraynk

    I Derivation of Lax-Wendroff finite volume scheme

    Aug 20, 2018
    1
    487
    Replies: 1
    0
  53. fahraynk

    I Solving PDE's with chebychev FFT

    Aug 5, 2018
    11
    735
    Replies: 11
    2
  54. HumanistEngineer

    A 1D Convection Diffusion Equation - Inlet Mixing Effect

    Jul 27, 2018
    7
    595
    Replies: 7
    1
  55. nrqed

    A Very simple question about KP hierarchy

    Jul 14, 2018
    1
    676
    Replies: 1
    0
  56. Dimitris Papadim

    I Applications of second order linear non homogenous ordinary differential equations

    Jul 12, 2018
    1
    408
    Replies: 1
    2
  57. K Murty

    I RL circuit with polynomial forcing function solution (units)

    Jul 11, 2018
    6
    397
    Replies: 6
    7
  58. Roboto

    A Runge Kutta - units

    Jul 10, 2018
    16
    914
    Replies: 16
    3
  59. LagrangeEuler

    I Overdamping condition

    Jul 1, 2018
    3
    354
    Replies: 3
    0
  60. cg78ithaca

    A Generalization of hypergeometric type differential equation

    Jun 23, 2018
    2
    662
    Replies: 2
    0
  61. Phylosopher

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

    Jun 23, 2018
    11
    477
    Replies: 11
    9
  62. CE Adamson

    A ODE from Geometry Problem

    Jun 22, 2018
    6
    611
    Replies: 6
    4
  63. Mr Davis 97

    I SHM and the sign of k

    Jun 15, 2018
    2
    421
    Replies: 2
    0
  64. robinegberts

    A Asymptotic solutions to a differential equation

    Jun 13, 2018
    1
    389
    Replies: 1
    1
  65. morenopo2012

    I Heat equation plus a constant

    Jun 13, 2018
    1
    377
    Replies: 1
    0
  66. K Murty

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

    Jun 1, 2018
    3
    656
    Replies: 3
    2
  67. mertcan

    A Spectral Theorem to Convert PDE into ODE

    May 30, 2018
    3
    737
    Replies: 3
    0
  68. LSMOG

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

    May 26, 2018
    3
    507
    Replies: 3
    0
  69. Riotto

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

    May 25, 2018
    1
    404
    Replies: 1
    0
  70. joshmccraney

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

    May 19, 2018
    4
    720
    Replies: 4
    2
  71. Gribouille

    A Vector differential equation

    May 17, 2018
    6
    780
    Replies: 6
    1
  72. arehman1289

    A Stefan Problem

    May 8, 2018
    1
    347
    Replies: 1
    0
  73. joshmccraney

    A RK4 on numerical RHS

    May 2, 2018
    5
    652
    Replies: 5
    1
  74. Voq

    I Linear differential equation

    May 1, 2018
    1
    483
    Replies: 1
    1
  75. swampwiz

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

    Apr 30, 2018
    4
    361
    Replies: 4
    0
  76. timetraveller123

    Confusion about series solutions to differential equations

    Apr 30, 2018
    10
    898
    Replies: 10
    5
  77. Karagoz

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

    Apr 22, 2018
    5
    535
    Replies: 5
    0
  78. dRic2

    I What does this line mean?

    Apr 18, 2018
    12
    667
    Replies: 12
    4
  79. synMehdi

    A Pontryagin minimum principle with control constraints

    Apr 5, 2018
    8
    749
    Replies: 8
    2
  80. joshmccraney

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

    Apr 3, 2018
    1
    614
    Replies: 1
    0
  81. mertcan

    A Runge Kutta finite difference of differential equations

    Apr 3, 2018
    6
    872
    Replies: 6
    0
  82. Christofer Br

    B How to calculate travel time as a function of distance

    Apr 2, 2018
    6
    488
    Replies: 6
    0
  83. Arman777

    I Cauchy-Euler Diff. Eqn

    Apr 2, 2018
    4
    554
    Replies: 4
    0
  84. hunt_mat

    A Stability for a system of nonlinear ODEs

    Mar 27, 2018
    9
    951
    Replies: 9
    0
  85. wmrunner24

    A Intermediate Axis Theorem - Lyapunov's Indirect Method

    Mar 25, 2018
    1
    643
    Replies: 1
    0
  86. Another

    I Laplace's equation

    Mar 21, 2018
    3
    578
    Replies: 3
    0
  87. joshmccraney

    A Solving an ODE Eigenvalue Problem via the Ritz method

    Mar 15, 2018
    1
    636
    Replies: 1
    0
  88. Dubz

    I Cross product?

    Mar 15, 2018
    2
    469
    Replies: 2
    0
  89. Another

    I Laplace's equation in 3 D

    Mar 14, 2018
    5
    521
    Replies: 5
    0
  90. joshmccraney

    A Legendre's ODE

    Mar 7, 2018
    5
    659
    Replies: 5
    3
  91. learn.steadfast

    I Minimizing a non-linear ODE in f, f_t

    Mar 2, 2018
    5
    613
    Replies: 5
    0
  92. Tunalover

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

    Feb 28, 2018
    8
    615
    Replies: 8
    1
  93. Atr cheema

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

    Feb 23, 2018
    1
    769
    Replies: 1
    0
  94. Atr cheema

    I How to find a solution to this linear ODE?

    Feb 22, 2018
    4
    687
    Replies: 4
    0
  95. AAli

    I Trying to obtain a 2nd order ODE

    Feb 21, 2018
    6
    736
    Replies: 6
    1
  96. hunt_mat

    A Applying boundary conditions on an almost spherical body

    Feb 21, 2018
    3
    673
    Replies: 3
    0
  97. SemM

    A Solve a non-linear ODE of third order

    Feb 20, 2018
    5
    616
    Replies: 5
    2
  98. hugo_faurand

    B Calculate the expression of the antiderivative

    Feb 19, 2018
    9
    689
    Replies: 9
    0
  99. joshmccraney

    A Green's Function and Variation of Parameters

    Feb 13, 2018
    1
    627
    Replies: 1
    0
  100. BWV

    I Neural Networks vs Traditional Numerical Methods

    Feb 12, 2018
    2
    607
    Replies: 2
    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.