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Differential Equations

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  1. Hurkyl

    [MUST READ] This forum is not for homework or any textbook-style questions.

    Feb 23, 2013

    1

    0
    Replies: 1
  2. ExtravagantDreams

    Intro. to Differential Equations

    ... 5
    Jul 3, 2012

    95

    4
    Replies: 95
  1. Phylosopher

    I Why is Stoke's theorem of a closed path equal to zero?

    Sep 26, 2016 at 2:26 PM

    5

    4
    Replies: 5
  2. Meaningless

    A numerical solution in matlab

    Sep 26, 2016 at 6:55 AM

    3

    0
    Replies: 3
  3. Andy123

    I Three dimensional heat equation

    Sep 26, 2016 at 4:34 AM

    1

    0
    Replies: 1
  4. John_Blacktower

    A pseudospectral method using FFT to solve diff equation

    Sep 25, 2016 at 7:00 PM

    1

    0
    Replies: 1
  5. Diane Wilbor

    I Applications needing fast numerical conformal maps

    Sep 21, 2016 at 7:00 PM

    1

    0
    Replies: 1
  6. MiSo

    A Wave equation in cylindrical coordinates - different expression?

    Sep 19, 2016

    4

    0
    Replies: 4
  7. Juan Carlos

    A Second Order Differential equation Bessel-type

    Sep 18, 2016

    4

    1
    Replies: 4
  8. Hamal_Arietis

    I Large oscillations of pendulum

    Sep 18, 2016

    5

    3
    Replies: 5
  9. edgarpokemon

    I integrating factor of (y+1)dx+(4x-y)dy=0

    Sep 17, 2016

    6

    3
    Replies: 6
  10. echandler

    A Triple Product in Laplace Transform

    Sep 13, 2016

    2

    0
    Replies: 2
  11. joshmccraney

    A Help solving non-linear ODE analytically

    Sep 9, 2016

    4

    0
    Replies: 4
  12. Romanopoulos Stelios

    Differentiation of unitary operator U(t,t') in Peskin and Sc

    Sep 5, 2016

    1

    0
    Replies: 1
  13. transmini

    I Finding a Lipschitz Constant

    Aug 30, 2016

    2

    0
    Replies: 2
  14. Keccogrin

    A 2d SWE - Linear Gravity Wave

    Aug 29, 2016

    1

    0
    Replies: 1
  15. Dyatlov

    I Need help with a derivative solution

    Aug 28, 2016

    4

    2
    Replies: 4
  16. tomwilliam2

    I Solving linear differential equations

    Aug 25, 2016

    7

    0
    Replies: 7
  17. TheCanadian

    I Change of variable - partial derivative

    Aug 23, 2016

    5

    0
    Replies: 5
  18. obstinatus

    I Basic Separation of Variables problem

    Aug 23, 2016

    3

    0
    Replies: 3
  19. edgarpokemon

    I I need help with differential equation(3x^2-2y^2)(dy/dx)=2xy

    Aug 16, 2016

    9

    1
    Replies: 9
  20. semc

    A Imaginary time propagation to find eigenfunctions

    Aug 13, 2016

    2

    0
    Replies: 2
  21. INTP_ty

    B Can you reason out a differential equation using logic?

    Aug 13, 2016

    9

    0
    Replies: 9
  22. jonjacson

    A How to find a differential equation if I know its solution?

    Aug 13, 2016

    17

    6
    Replies: 17
  23. hojoon yang

    I Multi variable differential

    Aug 12, 2016

    1

    1
    Replies: 1
  24. rosekidcute

    I First order differential equations ??

    Aug 11, 2016

    11

    0
    Replies: 11
  25. TheCanadian

    I Computing boundary values

    Aug 10, 2016

    2

    0
    Replies: 2
  26. Ibrahim Mustafa

    I What are the generalized Sundman transformations?

    Aug 1, 2016

    1

    1
    Replies: 1
  27. vector_problems

    I Poisson Equation Neumann boundaries singularity

    Jul 31, 2016

    2

    0
    Replies: 2
  28. dynamicskillingme

    I Generating polynomials for a multistep method

    Jul 31, 2016

    3

    0
    Replies: 3
  29. rosekidcute

    I The algorithms involved in finding a solution with numerical methods

    Jul 30, 2016

    14

    0
    Replies: 14
  30. Jhair

    A Free damped vibration of a system of 2 dof, demostration

    Jul 29, 2016

    2

    0
    Replies: 2
  31. Twigg

    A Looking for a Reference on Smoothers for FEA

    Jul 26, 2016

    1

    0
    Replies: 1
  32. petterson

    A Differential equation with integral

    Jul 26, 2016

    3

    1
    Replies: 3
  33. Houeto

    A Initial value ODE with shifting forcing function

    Jul 25, 2016

    5

    1
    Replies: 5
  34. Johnny_Sparx

    A Numerical Solution for Complex PDE (Ginzburg-Landau Eqn.)

    ... 2
    Jul 25, 2016

    31

    1
    Replies: 31
  35. rosekidcute

    I Few more numerical methods question...?

    Jul 25, 2016

    7

    0
    Replies: 7
  36. Houeto

    A Fourier Transform of a piecewise function

    Jul 24, 2016

    3

    2
    Replies: 3
  37. rosekidcute

    I Differential equations and numerical methods questions

    Jul 22, 2016

    8

    0
    Replies: 8
  38. semc

    A Numerically calculating non-homogeneous ODE system

    Jul 22, 2016

    5

    1
    Replies: 5
  39. matthew9

    I Which derivatives should I review for my DiffEq course?

    Jul 21, 2016

    4

    0
    Replies: 4
  40. player100

    A Nonlinear Bessel-type ODE

    Jul 19, 2016

    2

    0
    Replies: 2
  41. srinaath

    I Why do we linearise a non linear system

    Jul 17, 2016

    7

    1
    Replies: 7
  42. Houeto

    What kind of ODE is this?

    Jul 16, 2016

    3

    0
    Replies: 3
  43. baptiste

    I Solution of Ld2f/dx2=sinh(f)

    Jul 16, 2016

    4

    0
    Replies: 4
  44. imsmooth

    I Chain rule found in MIT video

    Jul 16, 2016

    9

    0
    Replies: 9
  45. Rdgmol

    A Partial Differential - Thermodynamics

    Jul 13, 2016

    1

    1
    Replies: 1
  46. depizixuri

    I How to solve 2y+(y')^2+ax^b=0 ?

    Jul 12, 2016

    10

    1
    Replies: 10
  47. Shayan.J

    A Numerical solution of two coupled nonlinear PDEs

    Jul 12, 2016

    8

    0
    Replies: 8
  48. Frank Castle

    I Diagonalising a system of differential equations

    Jul 12, 2016

    5

    0
    Replies: 5
  49. rosekidcute

    B A few differential equation questions

    Jul 12, 2016

    19

    0
    Replies: 19
  50. TheCanadian

    I Change of variable (2nd order ODE)

    Jul 8, 2016

    8

    0
    Replies: 8
  51. sleepwalker27

    I Help with basic problem of kinematics

    Jul 7, 2016

    5

    1
    Replies: 5
  52. funlord

    B Where is the best place to put the arbitrary constant?

    Jul 1, 2016

    2

    0
    Replies: 2
  53. jostpuur

    I Verifying Kirchhoff formula

    Jun 26, 2016

    1

    0
    Replies: 1
  54. wasi-uz-zaman

    B Bessel Function of 1st and 2nd Kind

    Jun 26, 2016

    1

    0
    Replies: 1
  55. dumbdumNotSmart

    B System of differential equations Basic question

    Jun 25, 2016

    3

    0
    Replies: 3
  56. vector_problems

    I Solving u_x=(sin(x))*(u) in Fourier space

    Jun 21, 2016

    4

    0
    Replies: 4
  57. xavier777

    I Is this general solution correct?

    Jun 21, 2016

    3

    0
    Replies: 3
  58. funlord

    I I can't understand the fact

    Jun 17, 2016

    2

    1
    Replies: 2
  59. rppearso

    A Valve closure boundary condition

    Jun 14, 2016

    2

    0
    Replies: 2
  60. rosekidcute

    B Few basic questions about differential equations...

    Jun 14, 2016

    13

    0
    Replies: 13
  61. Mark44

    Insights Solving Homogeneous Linear ODEs using Annihilators - Comments

    Jun 13, 2016

    8

    2
    Replies: 8
  62. victor77

    Laplace transform to solve a nonhomogeneous equation

    Jun 12, 2016

    3

    0
    Replies: 3
  63. matematikawan

    A Boundary Value Problem

    Jun 8, 2016

    7

    2
    Replies: 7
  64. deepakphysics

    A Is there an analytical solution to the following problem?

    ... 2
    Jun 6, 2016

    20

    1
    Replies: 20
  65. lostinphysics44

    A Help understanding this extrapolation technique

    Jun 1, 2016

    9

    1
    Replies: 9
  66. Summer95

    I Confused about Finding the Green Function

    May 31, 2016

    6

    0
    Replies: 6
  67. joshmccraney

    I Notation question for an ODE

    May 27, 2016

    3

    1
    Replies: 3
  68. Andreas C

    I Derivative of an integral help

    ... 2
    May 25, 2016

    30

    7
    Replies: 30
  69. MatPhy

    A Laplace equation on a trapezoid

    May 24, 2016

    7

    3
    Replies: 7
  70. Aldo Leal

    I Crank-Nicholson in 2D with MATLAB

    May 23, 2016

    1

    0
    Replies: 1
  71. hyurnat4

    I How to find the inverse of an integral transform?

    May 23, 2016

    1

    0
    Replies: 1
  72. elements

    I What happens if you divide by a differential?

    May 23, 2016

    1

    0
    Replies: 1
  73. dynamicskillingme

    I What is the derivative of a matrix transpose?

    May 22, 2016

    2

    0
    Replies: 2
  74. jonjacson

    Is there an encyclopedia of DE that accepts solutions?

    May 20, 2016

    11

    3
    Replies: 11
  75. Elmira1

    A Nonhomogeneous second order nonlinear differential equations

    May 14, 2016

    4

    0
    Replies: 4
  76. hotvette

    A Variation of Parameters for System of 1st order ODE

    May 12, 2016

    1

    0
    Replies: 1
  77. adamjts

    B Complex Replacement: Justification?

    May 11, 2016

    1

    0
    Replies: 1
  78. Avi Nandi

    A Stochastic Differential equation: Dichotomous Process

    May 10, 2016

    1

    0
    Replies: 1
  79. rmiller70015

    I The Gamma Function

    May 9, 2016

    1

    2
    Replies: 1
  80. faradayscat

    I Non-homogeneous systems with repeated eigenvalues

    May 8, 2016

    1

    0
    Replies: 1
  81. SqueeSpleen

    A FEM, Space embedding doubt

    May 3, 2016

    3

    0
    Replies: 3
  82. nickthequick

    A Solving forced PDE with method of Characteristics

    May 2, 2016

    1

    0
    Replies: 1
  83. spacetimedude

    I Fourier transform of Dirac delta

    May 1, 2016

    3

    2
    Replies: 3
  84. Septim

    Equation satisfied by a rubber sheet

    ... 2
    May 1, 2016

    21

    2
    Replies: 21
  85. Molay Mahdi

    A How to visualize 3D solution on matlab??

    May 1, 2016

    1

    1
    Replies: 1
  86. Frank Castle

    I Solution to PDEs via Fourier transform

    Apr 28, 2016

    12

    0
    Replies: 12
  87. space-time

    I Laplace transforms of y^n

    Apr 24, 2016

    5

    3
    Replies: 5
  88. faradayscat

    I Fundamental solutions and fundamental matrices

    Apr 22, 2016

    2

    0
    Replies: 2
  89. Heneng

    I Undetermined coefficients - nonhomogenous system

    Apr 17, 2016

    1

    0
    Replies: 1
  90. Petra de Ruyter

    I Clarification of classification of ODE

    Apr 15, 2016

    6

    0
    Replies: 6
  91. deltapapazulu

    I Zill DE text says (y-x)dx+(4xy)dy=0 can be rewritten as...

    Apr 14, 2016

    1

    0
    Replies: 1
  92. Carmen_8

    A EDP doubt

    Apr 11, 2016

    1

    0
    Replies: 1
  93. TheJfactors

    A Boundary Value Problem Requiring Quarterwave Symmetry

    Apr 11, 2016

    1

    0
    Replies: 1
  94. LagrangeEuler

    A Derivatives of functions in ODE

    Apr 10, 2016

    3

    0
    Replies: 3
  95. economicsnerd

    A Functions with "antisymmetric partial"

    Apr 7, 2016

    6

    0
    Replies: 6
  96. noelll

    I 4th order Runge-Kutta with system of coupled 2nd order ode motion equations

    Apr 3, 2016

    14

    0
    Replies: 14
  97. Donghyun Kim

    A Is it possible to solve this differential equation?

    Apr 1, 2016

    2

    0
    Replies: 2
  98. shevir1

    I Solving Navier Stokes & energy equations with different coordinates

    Mar 31, 2016

    2

    0
    Replies: 2
  99. Sum Guy

    I Question about solution to Laplacian in Spherical Polars

    Mar 31, 2016

    1

    1
    Replies: 1
  100. Bounceback

    B Integrating any e^f(x) function

    Mar 31, 2016

    15

    0
    Replies: 15
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