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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. chimay

    A Laplace equation- variable domain

    Sep 21, 2017 at 8:48 AM

    0

    0
    Replies: 0
  2. Hypatio

    A Finite difference of fourth order partial differential

    Sep 19, 2017 at 8:47 PM

    5

    0
    Replies: 5
  3. Telemachus

    I Heat equation with variable coefficients

    Sep 13, 2017

    15

    10
    Replies: 15
  4. Runei

    I Complex representation of wave function

    Sep 11, 2017

    2

    0
    Replies: 2
  5. chimay

    A Cylindrical Poisson equation for semiconductors

    Sep 8, 2017

    4

    0
    Replies: 4
  6. tim9000

    B Simple double integration of square wave question

    Sep 8, 2017

    19

    2
    Replies: 19
  7. SeM

    A Transforming a PDE with Laplace method

    Sep 7, 2017

    2

    0
    Replies: 2
  8. Jianphys17

    I The role of the weight function for adjoint DO

    Sep 2, 2017

    3

    1
    Replies: 3
  9. SeM

    I Laplacian Operator in 2D

    Sep 2, 2017

    1

    0
    Replies: 1
  10. solanojedi

    A Complex notation in telegrapher's equations

    Sep 1, 2017

    2

    0
    Replies: 2
  11. Telemachus

    I Separation of variables for nonhomogeneous differential equation

    Aug 24, 2017

    2

    1
    Replies: 2
  12. Frank Einstein

    I Question about second order linear differential equations

    Aug 23, 2017

    6

    2
    Replies: 6
  13. Assaf Peled

    A Yet another Poisson-Botzmann case

    Aug 20, 2017

    3

    0
    Replies: 3
  14. hunt_mat

    A Problems with identities involving Legendre polynomials

    Aug 10, 2017

    16

    0
    Replies: 16
  15. rajesh_d

    A Solution of a weakly formulated pde involving p-Laplacian

    Aug 9, 2017

    1

    0
    Replies: 1
  16. math4everyone

    A Equilibrium in system of non-linear difference equations

    Aug 5, 2017

    3

    2
    Replies: 3
  17. Telemachus

    I Sturm-Liouville theory in multiple dimensions

    Aug 1, 2017

    8

    5
    Replies: 8
  18. redtree

    I Green's function and the evolution operator

    ... 2
    Jul 22, 2017

    33

    3
    Replies: 33
  19. grquanti

    I Second order PDE with variable coefficients

    Jul 21, 2017

    5

    0
    Replies: 5
  20. joshmccraney

    A Constructing a function space to automatically satisfy BCs

    Jul 19, 2017

    1

    0
    Replies: 1
  21. grquanti

    I Substitution in partial differential equation

    Jul 9, 2017

    1

    0
    Replies: 1
  22. Kyong

    A A system of partial differential equations with complex vari

    Jul 6, 2017

    1

    0
    Replies: 1
  23. maistral

    A Discretization for a fourth-order PDE (and solution)

    Jul 6, 2017

    2

    2
    Replies: 2
  24. Adgorn

    I Question regarding integration of an equation

    ... 2
    Jul 5, 2017

    20

    7
    Replies: 20
  25. awholenumber

    I What are partial differential equations?

    ... 2
    Jul 4, 2017

    26

    3
    Replies: 26
  26. joshmccraney

    A Rayleigh-Ritz Example

    Jul 4, 2017

    1

    0
    Replies: 1
  27. fresh_42

    I Free pdf for PDE on AMS Open Math Notes

    Jun 30, 2017

    2

    2
    Replies: 2
  28. Telemachus

    A Some questions regarding the ADI Method

    Jun 28, 2017

    2

    1
    Replies: 2
  29. Drakkith

    I When is a Constant a Solution to a Differential Equation

    Jun 27, 2017

    11

    0
    Replies: 11
  30. ecastro

    I What is the Result of this Partial Derivative

    Jun 21, 2017

    3

    0
    Replies: 3
  31. davidge

    I How do you solve this equation?

    Jun 18, 2017

    4

    4
    Replies: 4
  32. Drakkith

    I Quick Differential Form Question

    Jun 14, 2017

    5

    1
    Replies: 5
  33. Drakkith

    I Question About Exact Differential Form

    Jun 14, 2017

    7

    1
    Replies: 7
  34. chimay

    I Laplace equation boundary conditions

    Jun 12, 2017

    6

    0
    Replies: 6
  35. inertiagrav

    A A system of DEs with variable coefficients.

    Jun 10, 2017

    2

    0
    Replies: 2
  36. maistral

    A 2D Cartesian Laplace equation with a single point diffusion

    May 30, 2017

    6

    0
    Replies: 6
  37. redtree

    I Independence of variables in Convolution

    May 27, 2017

    1

    0
    Replies: 1
  38. RamosPinto

    I Two point boundary problem - Shooting method

    May 27, 2017

    8

    1
    Replies: 8
  39. maistral

    A Weird looking Bessel-like DE

    May 17, 2017

    2

    0
    Replies: 2
  40. maistral

    A Finite difference formulation ideas (journal verification)

    May 15, 2017

    8

    0
    Replies: 8
  41. keropi452

    A 2nd Order PDE Using Similarity Method

    May 14, 2017

    5

    0
    Replies: 5
  42. Polygon

    I Electrical circuit differential equation

    May 14, 2017

    7

    1
    Replies: 7
  43. sagamore4110

    I Constructing a 2nd order homogenous DE given fundamental solution

    May 13, 2017

    3

    1
    Replies: 3
  44. Gallo

    A Conceptual Solution of a First Order PDE

    May 13, 2017

    3

    0
    Replies: 3
  45. PeteSampras

    I Weak maximum principle

    May 11, 2017

    1

    1
    Replies: 1
  46. Aldnoahz

    I Uniqueness and Existence Theorm

    May 6, 2017

    7

    2
    Replies: 7
  47. maistral

    A 2D Finite Difference formulation in polar coordinates.

    May 3, 2017

    4

    0
    Replies: 4
  48. maistral

    A RK method for heat equation with dependent variables

    May 2, 2017

    1

    0
    Replies: 1
  49. Chan Pok Fung

    I 2D Laplacian in polar coordinates

    May 2, 2017

    3

    2
    Replies: 3
  50. Aggie1313

    A 2D Finite Difference Convergence Rate Issues

    May 1, 2017

    1

    0
    Replies: 1
  51. Chan Pok Fung

    I Determining the coefficient of the legendre polynomial

    May 1, 2017

    2

    1
    Replies: 2
  52. Andrew Deleonardis

    I Lagrange Pendulum Equation of Motion

    Apr 24, 2017

    5

    0
    Replies: 5
  53. MAGNIBORO

    I PDE with recursive relation

    Apr 19, 2017

    7

    0
    Replies: 7
  54. maistral

    A Implementing a weird-looking boundary condition (PDE/FDM)

    Apr 15, 2017

    8

    0
    Replies: 8
  55. maistral

    A PDE discretization for semi-infinite boundary?

    Apr 15, 2017

    3

    1
    Replies: 3
  56. BiGyElLoWhAt

    A How to calculate the parabolic cylinder function D

    Apr 10, 2017

    12

    0
    Replies: 12
  57. Figaro

    I Second order DE with Sine function

    Apr 9, 2017

    6

    0
    Replies: 6
  58. MAGNIBORO

    I What method can be used to solve this pde?

    Apr 8, 2017

    7

    2
    Replies: 7
  59. joshmccraney

    A Bifurcation Diagram in AUTO

    Apr 6, 2017

    3

    1
    Replies: 3
  60. Mikeey aleex

    I Constructing left invariant vector fields on SO(3)

    Apr 3, 2017

    3

    0
    Replies: 3
  61. OmniNewton

    Convolution Properties

    Apr 3, 2017

    2

    0
    Replies: 2
  62. DoctorCasa

    I (Fluid Mechanics) stream function graph

    Mar 30, 2017

    1

    0
    Replies: 1
  63. humphreybogart

    I ∂^2u/∂x∂y = 0

    Mar 27, 2017

    3

    1
    Replies: 3
  64. batoulsy

    B What Integral Transform is this?

    Mar 23, 2017

    2

    0
    Replies: 2
  65. AT36

    A Solving an equation

    Mar 22, 2017

    3

    0
    Replies: 3
  66. Whiteboard_Warrior

    I Parameterization of linear operators on the holomorphisms

    Mar 20, 2017

    1

    0
    Replies: 1
  67. leo.

    I Wave equation solution using Fourier Transform

    Mar 17, 2017

    2

    0
    Replies: 2
  68. Radel

    A Convert to frequency domain

    Mar 16, 2017

    1

    0
    Replies: 1
  69. Pin Head

    B Finding Constant value K

    Mar 16, 2017

    1

    0
    Replies: 1
  70. mieral

    B One Equation for multiple random curves?

    Mar 13, 2017

    2

    1
    Replies: 2
  71. jonjacson

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

    Mar 13, 2017

    18

    7
    Replies: 18
  72. ddddd28

    I Characteristics of trigonometric function compositions like sin(sin(x))

    Mar 13, 2017

    6

    0
    Replies: 6
  73. VittorioT

    I Derivation of phase change parameter in dispersive medium

    Mar 8, 2017

    1

    0
    Replies: 1
  74. Reverend Shabazz

    A Legendre Polynomials Jackson Derivation

    Mar 6, 2017

    4

    1
    Replies: 4
  75. Kbenjamin827

    I Find the General solution of H.D.E

    Mar 2, 2017

    1

    0
    Replies: 1
  76. cg78ithaca

    A Inverse Laplace transform of a piecewise defined function

    Mar 1, 2017

    5

    0
    Replies: 5
  77. rabbed

    I Parameterization by differential equations

    Feb 22, 2017

    1

    0
    Replies: 1
  78. Apothem

    B First Order Non-Linear ODE (what method to use?)

    Feb 22, 2017

    4

    0
    Replies: 4
  79. Sirsh

    I Finding eigenvalues for 4 DOF system

    Feb 22, 2017

    2

    1
    Replies: 2
  80. vancouver_water

    I A few questions about Green's Functions...

    Feb 19, 2017

    1

    0
    Replies: 1
  81. FranciscoSili

    I Simple PDE

    Feb 19, 2017

    1

    1
    Replies: 1
  82. Michii

    I Differential equation of all the conics in the plane

    Feb 18, 2017

    4

    1
    Replies: 4
  83. dgoncha

    I Lambert's Law differential equation

    Feb 18, 2017

    1

    0
    Replies: 1
  84. Jordan0332

    I Volume of Frustum

    Feb 18, 2017

    0

    0
    Replies: 0
  85. Siddharth Rajvanshi

    I Ideal Gas Law and Differentiation

    Feb 17, 2017

    3

    0
    Replies: 3
  86. cg78ithaca

    A Inverse Laplace transform of F(s)=exp(-as) as delta(t-a)

    Feb 17, 2017

    0

    0
    Replies: 0
  87. JanisEB

    A Can you solve (a-bx)y'+(c-dx)y-e=0 with a,b,c,d,e constants?

    Feb 17, 2017

    2

    1
    Replies: 2
  88. shinobi20

    I Nonlinear integration

    Feb 16, 2017

    2

    0
    Replies: 2
  89. volican

    I Classification of differential equation

    Feb 16, 2017

    1

    0
    Replies: 1
  90. MAGNIBORO

    I Differential Equations For Solving A Recursive equation

    Feb 14, 2017

    4

    2
    Replies: 4
  91. aaaa202

    I Solving Poisson's Equation Using Finite Difference

    Feb 13, 2017

    1

    0
    Replies: 1
  92. aaaa202

    I Solving Poissons Equation Using Finite Difference

    Feb 13, 2017

    0

    0
    Replies: 0
  93. want2graduate

    I What differential equations need to be solved more quickly?

    Feb 13, 2017

    7

    0
    Replies: 7
  94. james_a

    I Following an example. Implies L{2du/dt+1}=2s+1. I'm Confused.

    Feb 9, 2017

    1

    0
    Replies: 1
  95. hellotheworld

    I How to find the integrating factor? (1st order ODE)

    Feb 5, 2017

    2

    0
    Replies: 2
  96. darkdave3000

    I F(x,y) = f'(x) = dy/dx ?

    Feb 2, 2017

    18

    0
    Replies: 18
  97. joshmccraney

    I PDE Heat Eq

    Feb 2, 2017

    6

    0
    Replies: 6
  98. joshmccraney

    I 2nd order non-linear ODE

    Feb 2, 2017

    2

    1
    Replies: 2
  99. Mr Davis 97

    I Difference between Wronskian and other methods

    Jan 31, 2017

    8

    0
    Replies: 8
  100. hikari1987

    A Exact solution to Poisson equation in 2D

    Jan 29, 2017

    1

    0
    Replies: 1
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