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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. redtree

    I Green's function and the evolution operator

    ... 2
    Jul 22, 2017 at 5:16 PM

    33

    3
    Replies: 33
  2. grquanti

    I Second order PDE with variable coefficients

    Jul 21, 2017

    5

    0
    Replies: 5
  3. joshmccraney

    A Constructing a function space to automatically satisfy BCs

    Jul 19, 2017

    1

    0
    Replies: 1
  4. grquanti

    I Substitution in partial differential equation

    Jul 9, 2017

    1

    0
    Replies: 1
  5. Kyong

    A A system of partial differential equations with complex vari

    Jul 6, 2017

    1

    0
    Replies: 1
  6. maistral

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

    Jul 6, 2017

    2

    2
    Replies: 2
  7. Adgorn

    I Question regarding integration of an equation

    ... 2
    Jul 5, 2017

    20

    7
    Replies: 20
  8. awholenumber

    I What are partial differential equations?

    ... 2
    Jul 4, 2017

    26

    3
    Replies: 26
  9. joshmccraney

    A Rayleigh-Ritz Example

    Jul 4, 2017

    1

    0
    Replies: 1
  10. Telemachus

    I Sturm-Liouville theory in multiple dimensions

    Jul 4, 2017

    6

    3
    Replies: 6
  11. fresh_42

    I Free pdf for PDE on AMS Open Math Notes

    Jun 30, 2017

    2

    2
    Replies: 2
  12. Telemachus

    A Some questions regarding the ADI Method

    Jun 28, 2017

    2

    1
    Replies: 2
  13. Drakkith

    I When is a Constant a Solution to a Differential Equation

    Jun 27, 2017

    11

    0
    Replies: 11
  14. ecastro

    I What is the Result of this Partial Derivative

    Jun 21, 2017

    3

    0
    Replies: 3
  15. davidge

    I How do you solve this equation?

    Jun 18, 2017

    4

    4
    Replies: 4
  16. Drakkith

    I Quick Differential Form Question

    Jun 14, 2017

    5

    1
    Replies: 5
  17. Drakkith

    I Question About Exact Differential Form

    Jun 14, 2017

    7

    1
    Replies: 7
  18. chimay

    I Laplace equation boundary conditions

    Jun 12, 2017

    6

    0
    Replies: 6
  19. inertiagrav

    A A system of DEs with variable coefficients.

    Jun 10, 2017

    2

    0
    Replies: 2
  20. maistral

    A 2D Cartesian Laplace equation with a single point diffusion

    May 30, 2017

    6

    0
    Replies: 6
  21. redtree

    I Independence of variables in Convolution

    May 27, 2017

    1

    0
    Replies: 1
  22. RamosPinto

    I Two point boundary problem - Shooting method

    May 27, 2017

    8

    1
    Replies: 8
  23. maistral

    A Weird looking Bessel-like DE

    May 17, 2017

    2

    0
    Replies: 2
  24. maistral

    A Finite difference formulation ideas (journal verification)

    May 15, 2017

    8

    0
    Replies: 8
  25. keropi452

    A 2nd Order PDE Using Similarity Method

    May 14, 2017

    5

    0
    Replies: 5
  26. Polygon

    I Electrical circuit differential equation

    May 14, 2017

    7

    1
    Replies: 7
  27. sagamore4110

    I Constructing a 2nd order homogenous DE given fundamental solution

    May 13, 2017

    3

    1
    Replies: 3
  28. Gallo

    A Conceptual Solution of a First Order PDE

    May 13, 2017

    3

    0
    Replies: 3
  29. PeteSampras

    I Weak maximum principle

    May 11, 2017

    1

    1
    Replies: 1
  30. Aldnoahz

    I Uniqueness and Existence Theorm

    May 6, 2017

    7

    2
    Replies: 7
  31. maistral

    A 2D Finite Difference formulation in polar coordinates.

    May 3, 2017

    4

    0
    Replies: 4
  32. maistral

    A RK method for heat equation with dependent variables

    May 2, 2017

    1

    0
    Replies: 1
  33. Chan Pok Fung

    I 2D Laplacian in polar coordinates

    May 2, 2017

    3

    2
    Replies: 3
  34. Aggie1313

    A 2D Finite Difference Convergence Rate Issues

    May 1, 2017

    1

    0
    Replies: 1
  35. Chan Pok Fung

    I Determining the coefficient of the legendre polynomial

    May 1, 2017

    2

    1
    Replies: 2
  36. Andrew Deleonardis

    I Lagrange Pendulum Equation of Motion

    Apr 24, 2017

    5

    0
    Replies: 5
  37. MAGNIBORO

    I PDE with recursive relation

    Apr 19, 2017

    7

    0
    Replies: 7
  38. maistral

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

    Apr 15, 2017

    8

    0
    Replies: 8
  39. maistral

    A PDE discretization for semi-infinite boundary?

    Apr 15, 2017

    3

    1
    Replies: 3
  40. BiGyElLoWhAt

    A How to calculate the parabolic cylinder function D

    Apr 10, 2017

    12

    0
    Replies: 12
  41. Figaro

    I Second order DE with Sine function

    Apr 9, 2017

    6

    0
    Replies: 6
  42. MAGNIBORO

    I What method can be used to solve this pde?

    Apr 8, 2017

    7

    2
    Replies: 7
  43. joshmccraney

    A Bifurcation Diagram in AUTO

    Apr 6, 2017

    3

    1
    Replies: 3
  44. Mikeey aleex

    I Constructing left invariant vector fields on SO(3)

    Apr 3, 2017

    3

    0
    Replies: 3
  45. OmniNewton

    Convolution Properties

    Apr 3, 2017

    2

    0
    Replies: 2
  46. DoctorCasa

    I (Fluid Mechanics) stream function graph

    Mar 30, 2017

    1

    0
    Replies: 1
  47. humphreybogart

    I ∂^2u/∂x∂y = 0

    Mar 27, 2017

    3

    1
    Replies: 3
  48. batoulsy

    B What Integral Transform is this?

    Mar 23, 2017

    2

    0
    Replies: 2
  49. AT36

    A Solving an equation

    Mar 22, 2017

    3

    0
    Replies: 3
  50. Whiteboard_Warrior

    I Parameterization of linear operators on the holomorphisms

    Mar 20, 2017

    1

    0
    Replies: 1
  51. leo.

    I Wave equation solution using Fourier Transform

    Mar 17, 2017

    2

    0
    Replies: 2
  52. Radel

    A Convert to frequency domain

    Mar 16, 2017

    1

    0
    Replies: 1
  53. Pin Head

    B Finding Constant value K

    Mar 16, 2017

    1

    0
    Replies: 1
  54. mieral

    B One Equation for multiple random curves?

    Mar 13, 2017

    2

    1
    Replies: 2
  55. jonjacson

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

    Mar 13, 2017

    18

    7
    Replies: 18
  56. ddddd28

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

    Mar 13, 2017

    6

    0
    Replies: 6
  57. VittorioT

    I Derivation of phase change parameter in dispersive medium

    Mar 8, 2017

    1

    0
    Replies: 1
  58. Reverend Shabazz

    A Legendre Polynomials Jackson Derivation

    Mar 6, 2017

    4

    1
    Replies: 4
  59. Kbenjamin827

    I Find the General solution of H.D.E

    Mar 2, 2017

    1

    0
    Replies: 1
  60. cg78ithaca

    A Inverse Laplace transform of a piecewise defined function

    Mar 1, 2017

    5

    0
    Replies: 5
  61. rabbed

    I Parameterization by differential equations

    Feb 22, 2017

    1

    0
    Replies: 1
  62. Apothem

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

    Feb 22, 2017

    4

    0
    Replies: 4
  63. Sirsh

    I Finding eigenvalues for 4 DOF system

    Feb 22, 2017

    2

    1
    Replies: 2
  64. vancouver_water

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

    Feb 19, 2017

    1

    0
    Replies: 1
  65. FranciscoSili

    I Simple PDE

    Feb 19, 2017

    1

    1
    Replies: 1
  66. Michii

    I Differential equation of all the conics in the plane

    Feb 18, 2017

    4

    1
    Replies: 4
  67. dgoncha

    I Lambert's Law differential equation

    Feb 18, 2017

    1

    0
    Replies: 1
  68. Jordan0332

    I Volume of Frustum

    Feb 18, 2017

    0

    0
    Replies: 0
  69. Siddharth Rajvanshi

    I Ideal Gas Law and Differentiation

    Feb 17, 2017

    3

    0
    Replies: 3
  70. cg78ithaca

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

    Feb 17, 2017

    0

    0
    Replies: 0
  71. 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
  72. shinobi20

    I Nonlinear integration

    Feb 16, 2017

    2

    0
    Replies: 2
  73. volican

    I Classification of differential equation

    Feb 16, 2017

    1

    0
    Replies: 1
  74. MAGNIBORO

    I Differential Equations For Solving A Recursive equation

    Feb 14, 2017

    4

    2
    Replies: 4
  75. aaaa202

    I Solving Poisson's Equation Using Finite Difference

    Feb 13, 2017

    1

    0
    Replies: 1
  76. aaaa202

    I Solving Poissons Equation Using Finite Difference

    Feb 13, 2017

    0

    0
    Replies: 0
  77. want2graduate

    I What differential equations need to be solved more quickly?

    Feb 13, 2017

    7

    0
    Replies: 7
  78. james_a

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

    Feb 9, 2017

    1

    0
    Replies: 1
  79. hellotheworld

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

    Feb 5, 2017

    2

    0
    Replies: 2
  80. darkdave3000

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

    Feb 2, 2017

    18

    0
    Replies: 18
  81. joshmccraney

    I PDE Heat Eq

    Feb 2, 2017

    6

    0
    Replies: 6
  82. joshmccraney

    I 2nd order non-linear ODE

    Feb 2, 2017

    2

    1
    Replies: 2
  83. Mr Davis 97

    I Difference between Wronskian and other methods

    Jan 31, 2017

    8

    0
    Replies: 8
  84. hikari1987

    A Exact solution to Poisson equation in 2D

    Jan 29, 2017

    1

    0
    Replies: 1
  85. Andrew Deleonardis

    A Solve DE for theta component (hydrogen WF)

    Jan 9, 2017

    3

    0
    Replies: 3
  86. ahsanamin

    A Solution of ODEs With the Method of Iterated Integrals

    Jan 8, 2017

    0

    0
    Replies: 0
  87. OneByBane

    A How to solve this DE?

    Jan 4, 2017

    3

    1
    Replies: 3
  88. mahmud_dbm

    A How do i perform differentiation over summation?

    Dec 31, 2016

    4

    0
    Replies: 4
  89. Rahul Shenoy

    Parameter sensitivity analysis for nonlinear system

    Dec 28, 2016

    3

    0
    Replies: 3
  90. bilgeyalcin

    I Explaining the curious phenomenon that occurs

    Dec 27, 2016

    0

    0
    Replies: 0
  91. Caglar Yildiz

    I Solution of an ODE in series Frobenius method

    Dec 24, 2016

    1

    0
    Replies: 1
  92. BiGyElLoWhAt

    I A question about boundary conditions in Green's functions

    Dec 21, 2016

    1

    0
    Replies: 1
  93. bolbteppa

    Remembering Special Function Equations...

    Dec 20, 2016

    6

    1
    Replies: 6
  94. andrewkirk

    Insights Partial Differentiation Without Tears - Comments

    Dec 19, 2016

    6

    4
    Replies: 6
  95. fog37

    I Wavevector k in Helmholtz Equation

    Dec 18, 2016

    6

    0
    Replies: 6
  96. jonjacson

    B Elementary question on integrating an equation

    Dec 18, 2016

    2

    1
    Replies: 2
  97. BiGyElLoWhAt

    I A somewhat conceptual question about Green's functions

    Dec 17, 2016

    6

    2
    Replies: 6
  98. Radek Vavra

    I 2nd order linear ODE with varying coefficients

    Dec 16, 2016

    0

    0
    Replies: 0
  99. Sam2000009

    I Series expansion

    Dec 15, 2016

    0

    0
    Replies: 0
  100. Sam2000009

    I Laplace's equation for cylinder

    Dec 15, 2016

    0

    0
    Replies: 0
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