Differential Equations Forum

Join in expert discussion on differential equation topics like ODE and PDE. Differential equations are an equation involving derivatives of a function or functions.

Threads

Graduate Chaotic Attractors: Proving Fractals Exist

  • Sagar_C
  • · Replies 1 ·
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1

Solve f(t) with Heaviside Functions: Find b

  • Uniman
  • · Replies 1 ·
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1

Undergrad Inverse of s(x)=[1+f(x)]/[1-f(x)]

  • caitlinbennet
  • · Replies 9 ·
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9

Graduate Functional derivative: chain rule

  • CompuChip
  • · Replies 7 ·
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7

Finding Fixed Points for F, B, A

  • Dustinsfl
  • · Replies 12 ·
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12

Undergrad P.I of tanx and secx using Undetermined coefficients

  • iVenky
  • · Replies 5 ·
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5

Boundary conditions spherical coordinates

  • Dustinsfl
  • · Replies 1 ·
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1

Finding Temperature in a Rectangular Plate: $\nabla^2u=0$

  • Dustinsfl
  • · Replies 2 ·
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2

Graduate Rectangular Fourier Transform and its Properties

  • 0xDEADBEEF
  • · Replies 1 ·
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1

Is the Bottom Equality in this Complex Mathematical Equation Correct?

  • Dustinsfl
  • · Replies 1 ·
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1

Solving Second order non - homogeneous Differential Equation

  • ssh
  • · Replies 3 ·
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3

Graduate Is the Cauchy Equation Still Homogeneous if X is a Non-zero Function of x?

  • iVenky
  • · Replies 7 ·
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7

Graduate Complex Fourier Series: Uncovering the Mystery of Different Results for x^2

  • TehAdzMan
  • · Replies 4 ·
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4

Graduate Direction of trajectory, system of DE's and portrait phase in plane phase

  • fluidistic
  • · Replies 2 ·
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2

Undergrad Is this a differential equation?

  • James2
  • · Replies 20 ·
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20

Graduate C1*Ux+C2*Ut+C1*C2*Uxt=0, C1 and C2 are constant

  • p.sarafraz
  • · Replies 4 ·
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4

Graduate Particular integral of sin(ax+b)

  • iVenky
  • · Replies 2 ·
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2

Graduate Why DEs are Important: Realigning the Focus of University Teaching

  • Unstable
  • · Replies 8 ·
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8

High School Rearranging highschool physics equations

  • kimberlycc
  • · Replies 2 ·
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2

Undergrad Couldn't understand the proof for Method of variation of parameters

  • iVenky
  • · Replies 4 ·
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4

Graduate Doubt on P.I of [itex]e^{ax} V [/itex]

  • iVenky
  • · Replies 4 ·
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4

Undergrad Differential equation of a circle

  • iVenky
  • · Replies 4 ·
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4

Graduate Generalizing recursion in mapping functions

  • Pythagorean
  • · Replies 5 ·
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5

Graduate Heat Equation with moving source

  • muzialis
  • · Replies 4 ·
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4

Graduate Question on assumptions made during variation of parameters

  • NoOne0507
  • · Replies 1 ·
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1

Graduate D'Alembert solution of wave equation with initial velocity given

  • OneMoreName
  • · Replies 3 ·
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3

Undergrad Is this an homogeneous equation?

  • iVenky
  • · Replies 1 ·
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1

Graduate Clever coordinate substitution for linear PDE

  • sith
  • · Replies 5 ·
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5

Graduate PDE with an inequality constrain

  • BlackTulip
  • · Replies 5 ·
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5

Graduate Segregated method for numerical solution of a PDE system

  • FrankST
  • · Replies 2 ·
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2

Undergrad Assistance in checking transfer function

  • incognitor
  • · Replies 1 ·
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1

Graduate What kind of differential equation is the Schrodinger equation?

  • AxiomOfChoice
  • · Replies 1 ·
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1

Graduate Applying shooting method to 4nd two point value boundary problem

  • pgioun
  • · Replies 2 ·
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2

Undergrad Implicit differentiation vs differential equations?

  • James2
  • · Replies 1 ·
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1

Graduate How to solve this type of differential equations?

  • svenki7
  • · Replies 5 ·
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5

Undergrad Differentiating a 1st order ODE: really dumb question

  • cepheid
  • · Replies 2 ·
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2

Sturm-Liouiville: Why Does Integral Equal 0 or m=n?

  • Dustinsfl
  • · Replies 3 ·
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3

Graduate Attitude quaternion derivatives from Euler angular velocities

  • vicjun
  • · Replies 24 ·
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24

Solve Reduction of Order Legendre Polynomials Equation

  • Dustinsfl
  • · Replies 19 ·
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19

High School What Is the Meaning of 'the Argon Diagram'? Understanding Lecture Terminology

  • stgermaine
  • · Replies 1 ·
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1

Graduate Diffusion-type equations with Crank-Nicolson method

  • Mute
  • · Replies 0 ·
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0

Graduate System of second order linear coupled pde with constant coefficient

  • galuoises
  • · Replies 3 ·
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3

Graduate Solving the Heat Equation with R Code

  • verling
  • · Replies 1 ·
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1

Converting ODE to a system of ODEs

  • Dustinsfl
  • · Replies 3 ·
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3

SE Class 11 Physics Revision Notes Chapter 14 Oscillations

  • Dustinsfl
  • · Replies 12 ·
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12

Undergrad Back Euler method for 2nd order d.e

  • pgioun
  • · Replies 3 ·
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3

Solving Second order non - homogeneous Differential Equation

  • ssh
  • · Replies 3 ·
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3

Graduate Solution scheme for solution to PDE independent of time step

  • robby991
  • · Replies 7 ·
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7

Graduate How Can Euler-Bernoulli's Equation Be Solved Numerically Using C++?

  • pgioun
  • · Replies 1 ·
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1

How to start Laplace infinite domain

  • Dustinsfl
  • · Replies 13 ·
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13

Undergrad What exactly is a 2nd order differential equation?

  • Venomily
  • · Replies 5 ·
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5

Graduate How to solve these type of differential equations?

  • vamsikilaru
  • · Replies 3 ·
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3

Graduate Request for Hints to solve a Non-Linear PDE

  • mohammad449
  • · Replies 2 ·
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2

Explore Attraction Basins of Damped Double-Well Potential Model

  • Dustinsfl
  • · Replies 7 ·
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7

Laplace equation polar coordinates

  • Dustinsfl
  • · Replies 5 ·
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5

Solving Laplace's Equation on a $90^{\circ}$ Wedge

  • Dustinsfl
  • · Replies 2 ·
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2

Undergrad What is a differential equation and what use do they have?

  • QuantumTheory
  • · Replies 16 ·
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16

Historical Origins of Riccati Equation

  • Amer
  • · Replies 2 ·
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2

Solving for Roots of a Cubic Equation Using Perturbation Theory

  • Poirot1
  • · Replies 5 ·
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5

Graduate Transform Diff. Eq: Ordinary to More Convenient Expression

  • tbk1
  • · Replies 9 ·
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9

Laplace equation polar where does the ln constant come from

  • Dustinsfl
  • · Replies 1 ·
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1

Graduate Difficulties in solving following PDE

  • mohammad449
  • · Replies 4 ·
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4

Stable spiral but math says saddle

  • Dustinsfl
  • · Replies 1 ·
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1

Undergrad Compounding interest formula going awry

  • Locoism
  • · Replies 3 ·
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3

Graduate How Can Mathematica Be Used to Plot Transient Heating in a Slab?

  • Dustinsfl
  • · Replies 3 ·
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3

Undergrad Why Does the dy Disappear When Solving Differential Equations?

  • Physics-Pure
  • · Replies 3 ·
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3

Undergrad Can't finish a Laplace Initial Value Problem.

  • chief10
  • · Replies 24 ·
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24

Graduate Differential Equations - Mixture in an overflowing tank

  • proctortom
  • · Replies 3 ·
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3

Solving the Heat Equation with Initial Conditions

  • Dustinsfl
  • · Replies 5 ·
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5

Solving Laplace's Eq with Mixed BCs

  • Dustinsfl
  • · Replies 1 ·
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1

Undergrad Laplace Transform of squared trig functions help?

  • chief10
  • · Replies 2 ·
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2

Solving the Heat Equation with B.C. and I.C.

  • Dustinsfl
  • · Replies 2 ·
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2

Closed form solution for large eigenvalues

  • Dustinsfl
  • · Replies 1 ·
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1

Why is alpha mentioned in the cooling process equation?

  • Dustinsfl
  • · Replies 3 ·
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3

Graduate Can This Integral Be Solved Using an Integrating Factor?

  • busyocean
  • · Replies 4 ·
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4

Solve Laplace Eqn W/Derivative Boundary Condition

  • Dustinsfl
  • · Replies 15 ·
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15

Undergrad How do I find percentage of a substance in a mixture?

  • proctortom
  • · Replies 4 ·
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4

Graduate Riccati Equation. Unsure what substitution to use

  • Trestal
  • · Replies 4 ·
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4

Graduate Have You Seen This PDE Before?

  • Lurian
  • · Replies 2 ·
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2

Undergrad How to find f'(0) from a left handed limit? (multiple questions)

  • arbrelibre
  • · Replies 4 ·
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4

Setting up IC & BC for Steel Carburization

  • Dustinsfl
  • · Replies 19 ·
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19

Graduate How do Lie symmetries help find canonical coordinates in ODEs?

  • dydxforsn
  • · Replies 2 ·
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2

Non-Dimensionalizing PDE with Variable Scaling

  • Dustinsfl
  • · Replies 2 ·
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2

Graduate How to go about solving this first-order nonlinear differential equation?

  • Yondaime5685
  • · Replies 2 ·
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2

Graduate Need help solving functional analysis problem

  • BaitiTamam
  • · Replies 3 ·
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3

Undergrad How do they derive from equation A to B?

  • timeforchg
  • · Replies 7 ·
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7

Analyze Stability of Mathieu's Equation w/ Perturbation Method

  • Dustinsfl
  • · Replies 3 ·
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3

Undergrad Understanding the Ramp Function: Gate Function and Unit Step Explained"

  • jesse7771
  • · Replies 1 ·
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1

Graduate How do I solve a PDE of this form

  • a14smith
  • · Replies 1 ·
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1

Diffusion Equation Invariant to Linear Temp. Transform

  • Dustinsfl
  • · Replies 4 ·
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4

Graduate Existence of divergent solutions to system of ODEs

  • vega12
  • · Replies 5 ·
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5

Orthogonality of Eigenfunctions of Mixed Boundary Conditions

  • Dustinsfl
  • · Replies 2 ·
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2

Real and Complex Solutions for Linear System with 2x2 Matrix

  • Dustinsfl
  • · Replies 11 ·
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11

Undergrad Understanding the role of e in continuous growth and decay: A visual approach

  • autodidude
  • · Replies 11 ·
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11

Graduate Solving y'' + 2xy' + (1+x2)y = 0

  • zorro
  • · Replies 1 ·
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1

Graduate Conjugation of Complex Functions in Partial Differential Equations

  • L0r3n20
  • · Replies 6 ·
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6

Analysis of Shock Formation from Traffic Light Red Signal

  • Dustinsfl
  • · Replies 4 ·
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4
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9

Solving the Quasi-Linear 1-D Wave Equation

  • Dustinsfl
  • · Replies 4 ·
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4

Graduate First Order Differential Equation with Reflected Argument

  • bangbangbang
  • · Replies 5 ·
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5