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 How Does Changing Variables Simplify Nonlinear PDEs?

  • aquarian11
  • · Replies 3 ·
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3

Undergrad Expressing one function as linear combination of others

  • koolrizi
  • · Replies 2 ·
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2

Graduate Solving a Killing Vector Problem in General Relativity: Help with a PDE System

  • Magister
  • · Replies 3 ·
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3

Graduate Setting up a differential equation

  • danielI
  • · Replies 1 ·
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1

Graduate Computing distance as a function of time

  • tony873004
  • · Replies 1 ·
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1

Graduate Green's functions solution to Poisson's eqn (or something similar)

  • Green's Funk
  • · Replies 5 ·
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5

Graduate Solving the Partial Derivative Equation: xy*z^2

  • tehno
  • · Replies 9 ·
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9

Graduate Can Fractional Calculus Handle Derivatives of Non-Integer Orders?

  • batsan
  • · Replies 3 ·
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3

Undergrad Notation Q: What Does F(y/x) Mean?

  • theperthvan
  • · Replies 1 ·
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1

Undergrad Solving Second Order Inhomogeneous Equations with ODEs

  • naxiaodong
  • · Replies 4 ·
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4

Undergrad Simple differential equation substitution

  • Jamp
  • · Replies 8 ·
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8

Need a solution for the following problem

  • Showstopper
  • · Replies 20 ·
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20

Graduate Hyperbolic Equations: Definition & Explanation

  • verdigris
  • · Replies 1 ·
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1

Undergrad Can't Make Sense of Bernoulli Equation

  • snowJT
  • · Replies 1 ·
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1

Undergrad Not Understanding This Simplification

  • snowJT
  • · Replies 7 ·
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7

Graduate Why is there a prize of $1 million for showing that there are. ?

  • verdigris
  • · Replies 4 ·
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4

Graduate Is there a mathematical way to calculate the bifurcation of a system?

  • impendingChaos
  • · Replies 6 ·
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6

Graduate What are Navier-stokes equations and why are they difficult to solve?

  • verdigris
  • · Replies 5 ·
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5

High School Need help with linear equations? Check out these recommended websites!

  • snowJT
  • · Replies 1 ·
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1

Graduate Finding a Green Function for y''+1/24y=f(x) with Bounded Conditions | Math Help

  • tomboy67
  • · Replies 4 ·
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4

Graduate Dynamical systems:From explicit to implicit equations

  • pupoz
  • · Replies 6 ·
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6

Graduate Is There a Universal Method to Solve All Types of PDEs?

  • sid_galt
  • · Replies 1 ·
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1

Graduate Heat equation and Theta, Parts I-III

  • Chris Hillman
  • · Replies 1 ·
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1

Graduate How Do We Ensure Solutions to Differential Equations Are Unique?

  • CPL.Luke
  • · Replies 3 ·
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3

Undergrad 0 = 3[cos(35)*cos(A) - sin(35)*sin(A)] - cos(A)

  • Fresh4Christ
  • · Replies 4 ·
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4

Graduate Non-hom heat eq. w/ Dirichlet + Neumann BC

  • BangJensen
  • · Replies 1 ·
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1

Undergrad Is There a Mistake in These Differential Equation Notes?

  • snowJT
  • · Replies 19 ·
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19

Undergrad Solving a Simple PDE: Understanding D/Dr and D/Dt

  • quantum123
  • · Replies 3 ·
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3

Graduate Inverse laplace method for equation .

  • cabellos
  • · Replies 2 ·
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2

Graduate Existence of solution to Poisson's equation

  • Manchot
  • · Replies 4 ·
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4

High School Understanding Orders & Degrees in an Equation

  • Dr Game
  • · Replies 6 ·
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6

Graduate Solve PDE: Find F to Satisfy \lambda F + (\frac{\partial F}{\partial y})^{2}=0

  • Karlisbad
  • · Replies 1 ·
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1

Graduate Understanding Fourier Transforms: Solving Confusion with Even Functions

  • engcon
  • · Replies 4 ·
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4

Undergrad The auxiliary equation. Where did it come from?

  • dionysian
  • · Replies 7 ·
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7

Undergrad Why are some differential equations not exact?

  • Jamp
  • · Replies 24 ·
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24

Undergrad How to Apply Runge-Kutta to Solve a Simple Motion Problem

  • scorp007
  • · Replies 6 ·
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6

Graduate Finding Nontrivial Solutions to Coupled PDEs in Polar Spherical Coordinates

  • Old Smuggler
  • · Replies 14 ·
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14

Graduate A new Hilbert-Polya (approximate) Operator?

  • Karlisbad
  • · Replies 6 ·
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6

Graduate Power Series & Singular Points: Why Change the Form?

  • CPL.Luke
  • · Replies 1 ·
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1
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1

Graduate Fourier Transforms by Looking at it

  • Mindscrape
  • · Replies 6 ·
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6

Graduate Solving a Separable 2nd Order Differential Equation

  • Atomos
  • · Replies 4 ·
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4

Graduate Solving Airy's Equation: Numerical Method & Steps

  • robbin53
  • · Replies 2 ·
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2

Graduate Solve Diff Eq: \frac{d^2x}{dy^2}+(\frac{y}{2}-\frac{1}{y})\frac{dx}{dy}=0

  • Peregrine
  • · Replies 3 ·
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3

Graduate Me this Inverse Laplace Transformation question

  • mak_wilson
  • · Replies 5 ·
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5

Graduate How Do You Solve This Complex Laplace Inverse Problem?

  • expi123
  • · Replies 8 ·
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8

Graduate Help in solving a second-order linear differential equation

  • Aero
  • · Replies 1 ·
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1

Graduate Recirculation Current in an Inductor

  • EigenFunctions
  • · Replies 2 ·
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2

Undergrad How to Solve a Second Order Differential Equation with Given Initial Conditions?

  • Dimedrol
  • · Replies 7 ·
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7

Graduate Verifying Laplace Transform Solution for x' + 2y' + x = 0, x' - y' + y = 1

  • highlander2k5
  • · Replies 1 ·
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1

Undergrad Struggling with a Second Order Differential Equation? Let Us Help!

  • zina_6
  • · Replies 12 ·
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12

Graduate Partial Differentiation and Conic Asymptotes

  • chaoseverlasting
  • · Replies 4 ·
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4

Undergrad A simple differential equation problem.

  • MathematicalPhysicist
  • · Replies 13 ·
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13

Graduate Solving Conventional PDEs: Separation of Variables and Eigen Theory

  • pivoxa15
  • · Replies 3 ·
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3

Graduate Singular points in 3-dim space

  • firenze
  • · Replies 2 ·
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2

Graduate How to Form the Differential Equation for a Curve with Equidistant Normal?

  • chaoseverlasting
  • · Replies 4 ·
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4

Graduate Proof for this Laplace transform

  • Reshma
  • · Replies 2 ·
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2

Graduate Understanding the Role of Singularities in Finding Integrating Factors

  • swimmingtoday
  • · Replies 5 ·
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5

Graduate Finding Optimal Panel Dimensions to Minimize Total Area

  • sharklaser
  • · Replies 1 ·
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1

Undergrad Modeling Building Response to Earthquakes: ODE Approach

  • aquabug918
  • · Replies 2 ·
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2

Undergrad Master Non-Seperable ODEs for Physics | Crep Inc.

  • crepincdotcom
  • · Replies 11 ·
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11

Undergrad Help with Laplace Transform of (t+2)sinh2t

  • cabellos
  • · Replies 4 ·
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4

Graduate Non-Homogeneous Heat Equation Problem

  • smellymoron
  • · Replies 9 ·
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9

Graduate How to Solve the Partial Differential Equation x(δu/δx)-(1/2)y(δu/δy)=0?

  • EDerkatch
  • · Replies 12 ·
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12

Graduate Solve A(x) ∆F[f]/∆f + J(x)F[f] = 0

  • Karlisbad
  • · Replies 3 ·
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3

Graduate Solving Mass Spring System Collision ODEs

  • Nenad
  • · Replies 2 ·
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2

Graduate A PDE and Linear operator questions.

  • Karlisbad
  • · Replies 2 ·
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2

Undergrad Fourier Intergrals and transforms

  • Brewer
  • · Replies 3 ·
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3

Undergrad Where to Find Solved PDE Problems Online?

  • jbusc
  • · Replies 2 ·
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2

Graduate How Do You Solve Putnam 2005 B3 with a Polynomial Guess?

  • SeReNiTy
  • · Replies 2 ·
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2

Undergrad This problem is hindering my overall work

  • Dimedrol
  • · Replies 5 ·
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5

Graduate Navier&Stokes to follow Poincare?

  • neutrino
  • · Replies 25 ·
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25

Undergrad What is the relationship between the Wronskian and linear independence?

  • CPL.Luke
  • · Replies 5 ·
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5

Graduate Help with Electrodynamics Equations

  • niebieski
  • · Replies 8 ·
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8

Graduate Solving 2nd Order Non-Homogeneous DE with Variables: A Comprehensive Guide

  • Peregrine
  • · Replies 2 ·
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2

Graduate A set of nonlinear coupled ODE's

  • gouranja
  • · Replies 6 ·
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6

Graduate Nonhomogeneous Linear Differential Equations with Constant Coefficients

  • highlander2k5
  • · Replies 8 ·
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8

Undergrad Product rule derivatives in method of undetermined coefficients

  • badman
  • · Replies 4 ·
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4

Graduate Solve DE: (y-1)e^y = [(x^2+1)^(3/2)]/3 + C

  • Growl
  • · Replies 3 ·
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3

Undergrad Real life situation to a sin graph on position by time graph

  • Skhandelwal
  • · Replies 6 ·
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6

Graduate Analytic solution of this, Advice.

  • Clausius2
  • · Replies 5 ·
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5

Undergrad Reduction of Order: Integration Explained

  • badman
  • · Replies 2 ·
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2

Undergrad Solving ln|x| Improper Integral: -1 to 1

  • james5
  • · Replies 1 ·
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1

Graduate How Do You Solve Nonautonomous Nonlinear ODEs Like dy/dt = A*y^n + g(t)?

  • blumfeld0
  • · Replies 2 ·
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2

Graduate Finding linearly independent solutions

  • highlander2k5
  • · Replies 7 ·
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7

Graduate Solving Drumhead PDE: Normal Modes and Estimation Techniques

  • spock0149
  • · Replies 7 ·
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7

Undergrad Differential equation tank problem

  • mabr0406
  • · Replies 5 ·
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5

Graduate Solving Homogeneous Problem: Initial Value & Substitution

  • The Bob
  • · Replies 5 ·
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5

Graduate Is the Navier-Stokes Conjecture Finally Solved?

  • selfAdjoint
  • · Replies 5 ·
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5

Graduate Need to find Green Function to solve ODE

  • romeo6
  • · Replies 4 ·
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4

Graduate Eigenfunction expansion method in PDE solutions

  • pivoxa15
  • · Replies 15 ·
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15

Graduate Complex Analysis: Finding Arg(z)

  • Iron Eagle
  • · Replies 5 ·
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5

Graduate Solving Non-Linear Boundary Problems: Challenges and Numerical Methods

  • Karlisbad
  • · Replies 2 ·
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2

Graduate Dirac delta function homework help

  • shoehorn
  • · Replies 9 ·
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9

Graduate Solve Recurrence Relation for DE x(x-2)y''+(1-x)y'+xy=0@x=2

  • esuess
  • · Replies 1 ·
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1

Graduate Can Partial Differential Equations Have Non-Separable Solutions?

  • pivoxa15
  • · Replies 3 ·
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3

Undergrad Second order partial derivatives using quotient rule

  • VooDoo
  • · Replies 2 ·
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2

Undergrad Substitution Methods and Exact Equations

  • enviroengnhopeful
  • · Replies 1 ·
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1

Graduate Does Non-Lipschitz f(x,t) Ensure No Global Unique Solution?

  • fortune
  • · Replies 1 ·
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1

Graduate Linear Operator: Eigenfunctions and Boundary Conditions for Energy Calculation

  • lokofer
  • · Replies 1 ·
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1