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 Proving C1 Continuity of a Person's Path in a 2D Environment

  • 12monkey
  • · Replies 2 ·
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2

Undergrad How to solve DE with irreducible quadratic

  • TOD
  • · Replies 1 ·
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1

Undergrad Find Function Like in Picture - No Trig Needed

  • TalonStriker
  • · Replies 10 ·
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10

Graduate Understanding the Chain Rule for Partial Derivatives in Multivariable Calculus

  • Somefantastik
  • · Replies 3 ·
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3

Undergrad Solving Differential Equation: dy/dx=3y | Travis

  • TravisUHEng
  • · Replies 1 ·
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1

Undergrad Solving Air Drag Equation for Beginners

  • v6maik
  • · Replies 4 ·
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4

Graduate Formulating Differential Equations

  • Tac-Tics
  • · Replies 8 ·
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8

Undergrad Homogeneous equation, problem with algebra

  • chaotixmonjuish
  • · Replies 10 ·
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10

Undergrad What is the Bernoulli Differential Equation Form of 3y^2y' + y^3 = e^-x?

  • Sean77771
  • · Replies 1 ·
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1

Undergrad Recommend a textbook about differential equations

  • princeton118
  • · Replies 4 ·
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4

Graduate Finding the eigenvectors (and behavior of solution) around the

  • Somefantastik
  • · Replies 1 ·
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1

Undergrad Basic PDE Help: Simplifying the Confusing Concepts | MathBin

  • jomomma
  • · Replies 6 ·
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6

Graduate Solving 2D Laplace Equation with Boundary Conditions

  • dzi
  • · Replies 2 ·
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2

Undergrad 1st order diff equ vs integral tables

  • rppearso
  • · Replies 5 ·
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5

Graduate Find 2 Missing Critical Points for x' = y(1 + x - y2) and y' = x(1 + y - x2)

  • Somefantastik
  • · Replies 7 ·
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7

Graduate Solving Initial Value Problem: Interval Defined?

  • 2RIP
  • · Replies 13 ·
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13

Undergrad How do I incorporate the initial velocity into the equation?

  • hydr
  • · Replies 1 ·
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1

Undergrad Derivative of dE=(kqz)/(z^2+R^2)^3/2 with respect to z

  • s7b
  • · Replies 3 ·
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3

Graduate How Do You Derive the Fourier Series for Laplace's Equation Solutions?

  • Somefantastik
  • · Replies 4 ·
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4

Graduate Can a Riccati-type Differential Equation with a Square Root Term be Classified?

  • Elros
  • · Replies 2 ·
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2

Graduate Transforming an ODE: Solving a Difficult Equation with a Simple Transformation

  • picard
  • · Replies 4 ·
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4

Undergrad Help Identifying ODE: x'' + k(x')^2 + c = 0

  • sir_manning
  • · Replies 3 ·
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3

Graduate Quick question-Representing a curve w/a DE

  • bcjochim07
  • · Replies 5 ·
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5

Graduate 2nd-Order Non-Linear ODE: Where to Start?

  • timo1023
  • · Replies 11 ·
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11

Undergrad Solving x'=sinx: Where do the x0's Come From?

  • evolution685
  • · Replies 3 ·
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3

Graduate Solving a first-order nonlinear differential equation.

  • swbluto
  • · Replies 11 ·
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11

Graduate Can a Measurable Function V Exist for Given Quantum Energy Eigenvalues?

  • jostpuur
  • · Replies 8 ·
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8

Graduate Infinite series solution for NON-linear ODEs?

  • smallphi
  • · Replies 3 ·
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3

Undergrad What Is Orthogonal Trajectory?

  • e4dragon
  • · Replies 2 ·
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2

Undergrad Derivatives of natural logarithmic functions

  • fr33pl4gu3
  • · Replies 5 ·
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5

High School What Is the Derivative of y = x^4 * 4x?

  • fr33pl4gu3
  • · Replies 1 ·
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1

Graduate Trouble with dirac delta in R^2

  • obomov2
  • · Replies 1 ·
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1

Graduate A differential equation : x^2 * u'' = k*u

  • obomov2
  • · Replies 2 ·
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2

Undergrad Fourier transform and steady state solution?

  • hanson
  • · Replies 1 ·
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1

Graduate How to Reduce the Order of the ODE y'' = c - 2(y')²/y?

  • efmsolver
  • · Replies 1 ·
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1

Graduate What Are All Second-Degree Harmonic Polynomials in R2?

  • Somefantastik
  • · Replies 2 ·
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2

Undergrad Order of differential equation

  • lizzie
  • · Replies 4 ·
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4

Graduate Y'' - y' = e^x [2nd order nonhomogenous diff Eq]

  • JeffNYC
  • · Replies 5 ·
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5

Graduate Number of solutions of a nonlinear differential equation.

  • arroy_0205
  • · Replies 13 ·
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13

Graduate Partial derivative of an ordinary derivative?

  • Ultimâ
  • · Replies 3 ·
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3

Graduate Wave Equation, stuck on a partial calculation

  • Somefantastik
  • · Replies 5 ·
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5

Undergrad Differential in a initial value problem

  • swooshfactory
  • · Replies 1 ·
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1

Graduate Solving Diff. Eq: Lambda f(y), Lambda g(y) - Get Hypergeometric?

  • VatanparvaR
  • · Replies 12 ·
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12

Undergrad Help with DE and UNIT STEP FUNCTION

  • tung
  • · Replies 3 ·
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3

Undergrad Need Help Solving These ODE Problems?

  • prison-rat
  • · Replies 4 ·
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4

Graduate Solving Euler Equation for F(K) and U(C) with Initial and Terminal Conditions

  • peteryellow
  • · Replies 1 ·
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1

Graduate Equation of heat conduction, vague text book

  • Somefantastik
  • · Replies 7 ·
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7

Graduate Numerical method to solve high order ODEs.

  • meridian
  • · Replies 4 ·
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4

Graduate Condition for a 2nd order differential eqn to have bounded solutions?

  • arroy_0205
  • · Replies 1 ·
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1

Undergrad 1st order non homogenous DE problem solving

  • Somefantastik
  • · Replies 9 ·
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9

Graduate Where Did My Integration by Parts Go Wrong?

  • Somefantastik
  • · Replies 4 ·
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4

Graduate Equation of Diffusion, trouble simplifying, PDE

  • Somefantastik
  • · Replies 5 ·
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5

Graduate Solving a Bessel Function DE in Electromagnetism | Cylindrical Coordinates

  • Phrak
  • · Replies 6 ·
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6

Graduate Convergence of Saddle-Point Approximation for Large M in Integrals

  • jfitz
  • · Replies 1 ·
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1

Graduate Generalizing separation technique

  • jostpuur
  • · Replies 2 ·
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2

Graduate Where did this term come from? (Fourier)

  • rsq_a
  • · Replies 1 ·
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1

Graduate Laplace and Poisson Equation in oblate and prolate spheroids

  • kingdavid
  • · Replies 2 ·
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2

Graduate Symmetry in Differential Equations: Benefits & Consequences

  • Marin
  • · Replies 10 ·
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10

Graduate Understanding Frobenius Method & ODEs: When to Use Set 1 or Set 2

  • bishy
  • · Replies 4 ·
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4

Graduate Understanding Fourier Equations in PDE for Beginners

  • hunter151
  • · Replies 2 ·
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2

Graduate Diff. eq. for the Einstein metric inside a body

  • gijeqkeij
  • · Replies 7 ·
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7

Undergrad Laplace transform of sin(ωt – Φ)

  • ch5497
  • · Replies 1 ·
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1

Undergrad Differential problem Confused :S

  • malee006
  • · Replies 3 ·
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3

Graduate Solve y'''=y'': Using Power Series to Solve Non-Linear Diff Eq

  • lkj-17
  • · Replies 3 ·
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3

Undergrad Solving Separable Equations: Hi, I'm Stuck!

  • Aero6
  • · Replies 2 ·
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2

Undergrad Integrating (ln x)^2/e^5t in Variation of Parameters Problem

  • eagleswings
  • · Replies 4 ·
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4

Graduate Need help drawing phase portraits for coupled systems of ODEs

  • Sdarcy
  • · Replies 2 ·
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2

Graduate Skew Adjoint Frechet derivative?

  • Anthony
  • · Replies 1 ·
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1

Undergrad From 2 1st order ODEs to 1 2nd order ODE?

  • pauperrimo
  • · Replies 6 ·
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6

Graduate Can Partial Multigrid Solutions Enhance Efficiency in CFD Simulations?

  • curiousOne
  • · Replies 1 ·
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1

Graduate Can Differential Equations Model Complex Systems Like the Stock Market?

  • aquaregia
  • · Replies 4 ·
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4

Graduate How Do I Solve This Differential Equation System?

  • ForMyThunder
  • · Replies 6 ·
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6

Graduate Nonlinear Differential equation and simplification techniques

  • arroy_0205
  • · Replies 1 ·
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1

Graduate Many-Body Numeric Integration Algorithm

  • Enjolras1789
  • · Replies 1 ·
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1

Graduate Solving an Annoying Equation with Trigonometry and Constants

  • latentcorpse
  • · Replies 20 ·
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20

Graduate Solving Non-Linear ODE's in Mathematica

  • robousy
  • · Replies 2 ·
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2

Undergrad Integration Factors: Solving Problems

  • confusedM
  • · Replies 3 ·
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3

Graduate Change of variables to polar coordinates

  • Defconist
  • · Replies 2 ·
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2

Graduate Method of characteristics for linear PDE's (variable coefficients)

  • Defconist
  • · Replies 2 ·
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2

Graduate What is Clairaut's Equation and How Does it Apply to Optics?

  • jnbfive
  • · Replies 46 ·
2
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46

Graduate Linear Partial Differential Equations Explained

  • Somefantastik
  • · Replies 2 ·
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2

Undergrad Understanding the Limit of dx Approaching 0 in Differentiating Products

  • Dumbledore
  • · Replies 2 ·
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2

Graduate Draw the trajectory in the x-xdot plane

  • franky2727
  • · Replies 6 ·
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6

Graduate A problem about integral of modified bessel function

  • jianingli
  • · Replies 1 ·
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1

Graduate Reducing Order: Is it Valid to Say G(x) = 0?

  • bishy
  • · Replies 2 ·
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2

Undergrad How would I solve a DiffEq of the form

  • K.J.Healey
  • · Replies 8 ·
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8

Undergrad What types of ODEs can Laplace Transforms effectively solve?

  • ice109
  • · Replies 4 ·
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4

Graduate Wave on a string and the chain rule Argh

  • physmurf
  • · Replies 1 ·
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1

Graduate Can These Second Order ODEs Model Planetary Trajectories?

  • Marin
  • · Replies 5 ·
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5

Graduate Numerical Integration and Energy Loss

  • KLoux
  • · Replies 3 ·
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3

Undergrad Runge-Kutta vs Euler: Solving Two-Dimensional Differential Equation

  • mrsvan
  • · Replies 1 ·
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1

Undergrad How can I determine if the equation (2x+3) + (2y-2)y' = 0 is exact or not?

  • fehwqjkfdehqa
  • · Replies 1 ·
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1

Undergrad How Do You Find the Integrating Factor for This Equation?

  • Happydog
  • · Replies 6 ·
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6

Graduate Solution to the nonlinear 2nd order d.e

  • younginmoon
  • · Replies 5 ·
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5

Graduate First order pde cauchy problem by method of characteristics

  • pk415
  • · Replies 1 ·
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1

Graduate How can a first order nonlinear differential equation be solved?

  • utterfly
  • · Replies 22 ·
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22

Graduate Helmholtz equation Neumann and divergence

  • Heimdall
  • · Replies 1 ·
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1

Graduate Green Function and Boundary Conditions

  • robousy
  • · Replies 4 ·
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4

Graduate Gradient of multiparticle wavefunction

  • confused_man
  • · Replies 1 ·
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1

Graduate 1st Order Nonlinear equation - Control

  • danielgdls
  • · Replies 1 ·
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1