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

Manipulating Differential Equations with the Chain Rule

  • abhay1
  • · Replies 2 ·
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2

Graduate Efficient Computation of k2 in RK4 for Numerical RHS | PF Discussion

  • member 428835
  • · Replies 5 ·
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5

Finding k values for non-zero solutions in integral equations?

  • Alone
  • · Replies 3 ·
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3

Undergrad How Can We Predict Particular Solutions for Linear Differential Equations?

  • Voq
  • · Replies 1 ·
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1

Undergrad What is term for DEQ that only has terms of a derivative?

  • swampwiz
  • · Replies 4 ·
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4

Graduate Confusion about series solutions to differential equations

  • timetraveller123
  • · Replies 10 ·
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10

High School What's the difference between 1000e^0.05t and 1000*1.05^t?

  • Karagoz
  • · Replies 5 ·
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5

What is the current in a wire loop outside a solenoid with a changing current?

  • MermaidWonders
  • · Replies 9 ·
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9

Undergrad Understanding the Eigenvalue Concept in Diffusion Equations

  • dRic2
  • · Replies 12 ·
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12

Fish Pond Challenge: Show Equilibrium Variation with $R_f$

  • lfdahl
  • · Replies 3 ·
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3

Max Horizontal Displacement of Projectile and its Velocity at T

  • Theia
  • · Replies 2 ·
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2

Graduate Pontryagin minimum principle with control constraints

  • synMehdi
  • · Replies 8 ·
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8

Graduate Runge Kutta finite difference of differential equations

  • mertcan
  • · Replies 6 ·
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6

Graduate Normalization of Bessel functions of the first kind

  • ShayanJ
  • · Replies 1 ·
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1

High School How to calculate travel time as a function of distance

  • Christofer Br
  • · Replies 6 ·
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6

Undergrad Cauchy-Euler Diff. Eqn: Transformation & Solution

  • Arman777
  • · Replies 4 ·
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4

Is $x$ an Increasing Function of $t$?

  • MermaidWonders
  • · Replies 8 ·
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8

Graduate Stability for a system of nonlinear ODEs

  • hunt_mat
  • · Replies 9 ·
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9

Analysing Salt Buildup in Water Reservoirs

  • MermaidWonders
  • · Replies 23 ·
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23

Undergrad Solve Laplace's Equation with Laplace Transform

  • Another
  • · Replies 3 ·
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3
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7

Local Error: Euler/Crank-Nicholson

  • ChrisHuey
  • · Replies 4 ·
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4

Undergrad Trying to get an explicit function(ish)

  • Pencilvester
  • · Replies 4 ·
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4

When the capacitor have 94% of its final voltage.

  • cbarker1
  • · Replies 1 ·
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1

-Eigenvectors and Eigenvalues (311.5.5.15)

  • karush
  • · Replies 4 ·
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4

Graduate Solving an ODE Eigenvalue Problem via the Ritz method

  • member 428835
  • · Replies 1 ·
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1

Undergrad PDE in ℝx(0,∞): Solving the Unknown

  • Dubz
  • · Replies 2 ·
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2

How Does the Wronskian Relate to Airy Functions Ai(x) and Bi(x)?

  • Alone
  • · Replies 5 ·
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5

L2:?Kirchhoff's Rules: Solve for R4 & V1,V2

  • cbarker1
  • · Replies 1 ·
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1

[ASK] Determine its velocity and direction after √(3)/2 seconds

  • Monoxdifly
  • · Replies 7 ·
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7

Undergrad What Are the Methods for Solving Laplace's Equation in 3D Coordinates?

  • Another
  • · Replies 5 ·
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5

What Functions Satisfy These Specific Recursive Conditions?

  • lfdahl
  • · Replies 2 ·
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2

I.7 verify that the given function is a solution

  • karush
  • · Replies 5 ·
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5

Graduate Finding the second solution to a singular ODE with L = 2, 3, 4

  • member 428835
  • · Replies 5 ·
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5

General solution y''+2y'+y=x(e^-x)+1

  • ToastIQ
  • · Replies 8 ·
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8

Why Are Differential Equations So Confusing?

  • MermaidWonders
  • · Replies 11 ·
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11

Example of systems of the differential linear equations

  • cbarker1
  • · Replies 1 ·
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1

Undergrad Minimizing a non-linear ODE in f, f_t

  • learn.steadfast
  • · Replies 5 ·
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5

Undergrad Spring-mass-dashpot response to half-sine pulse input

  • Tunalover
  • · Replies 8 ·
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8

Changing height in tank depending on time

  • havtorn
  • · Replies 1 ·
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1

Non-homogeneous differential equation, undetermined coefficients

  • ToastIQ
  • · Replies 3 ·
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3

High School Origin of the neutron diffusion angle formula

  • Nafis Fuad
  • · Replies 3 ·
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3

Undergrad How to find a solution to this linear ODE?

  • Atr cheema
  • · Replies 4 ·
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4

Undergrad Trying to obtain a 2nd order ODE

  • AAli
  • · Replies 6 ·
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6

Graduate Applying boundary conditions on an almost spherical body

  • hunt_mat
  • · Replies 2 ·
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2

Graduate Solve a non-linear ODE of third order

  • SemM
  • · Replies 5 ·
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5

High School Calculate the expression of the antiderivative

  • hugo_faurand
  • · Replies 9 ·
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9

Undergrad Correct notation for some functional expressions

  • Hypatio
  • · Replies 5 ·
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5

Modeling the flow from a gate at the bottom of the reservior

  • sumanraj
  • · Replies 1 ·
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1

Undergrad Neural Networks vs Traditional Numerical Methods

  • BWV
  • · Replies 1 ·
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1
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19

Stop Race Car in 1000 m with Parachute: Solve for Retarding Force

  • karush
  • · Replies 7 ·
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7

Undergrad Orthogonal 3D Basis Functions in Spherical Coordinates

  • dreens
  • · Replies 3 ·
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3

Cp2.27 How long is the ball in the air before it is caught

  • karush
  • · Replies 2 ·
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2

Graduate Numerical solution techniques for 6th order PDE's

  • Hologram0110
  • · Replies 1 ·
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1

Graduate Can the Unwrapped Phase Function of a Fourier Transform be Derived?

  • Cyrus
  • · Replies 1 ·
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1

Fixed point iteration: g is a contraction mapping

  • mathmari
  • · Replies 17 ·
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17
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2

How Do You Solve tan(2x - 5) = cot(x + 5) in the Interval 0 < x < 90?

  • Monoxdifly
  • · Replies 6 ·
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6

Undergrad What is the propagation speed of a diffusion

  • SirVuk
  • · Replies 4 ·
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4

Peak in single ODE within a system

  • Carla1985
  • · Replies 5 ·
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5

Graduate Heat equation on infinite domain

  • solanojedi
  • · Replies 3 ·
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3

Graduate Optimization of a nonlinear system

  • fahraynk
  • · Replies 5 ·
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5

Graduate Why Does the Wave Equation Solution Differ from Expected Traveling Waves?

  • solanojedi
  • · Replies 17 ·
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17

Undergrad Boundary Conditions for System of PDEs

  • Mzzed
  • · Replies 1 ·
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1

Undergrad Function describing a moving waveform

  • fog37
  • · Replies 4 ·
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4

Graduate Solving linear 2nd order IVP non-constant coefficient

  • member 428835
  • · Replies 15 ·
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15

Undergrad Complex Fourier Series: Even/Odd Half Range Expansion

  • Ali Baig
  • · Replies 2 ·
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2

Graduate Newmark-Beta vs Predictor Corrector

  • JTC
  • · Replies 1 ·
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1

Graduate How Does Green's Function Solve Nonlinear Boundary Value Problems?

  • Krikri
  • · Replies 2 ·
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2

Undergrad Classification of First Order Linear Partial Differential Eq

  • Ali Baig
  • · Replies 1 ·
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1

Undergrad Method for solving gradient of a vector

  • Mzzed
  • · Replies 5 ·
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5

Undergrad Using Fourier Transform to Solve ODE with Initial Conditions

  • ondine4
  • · Replies 6 ·
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6

Undergrad How to find the transfer function of xy, xy' etc?

  • goggles31
  • · Replies 1 ·
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1

Graduate Can Newton's method work with an approximated integral

  • fahraynk
  • · Replies 6 ·
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6

High School Why do derivatives of sin(2πft) include the 2πf coefficient?

  • Joao
  • · Replies 5 ·
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5

Undergrad Using Complex Numbers to find the solutions (simple Q.)

  • JTC
  • · Replies 3 ·
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3

Graduate Nonhomogeneous ODE with Dirac delta

  • grilo
  • · Replies 1 ·
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1

Graduate How to calculate confluent Heun functions numerically?

  • dongsh2
  • · Replies 1 ·
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1

Graduate Difficult partial differential Problem

  • big dream
  • · Replies 2 ·
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2

Differential equation w/ cos and sin

  • Emjay
  • · Replies 3 ·
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3

Undergrad Solving for constants in a differential equation

  • Tio Barnabe
  • · Replies 3 ·
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3

Graduate Solving the wave equation for oblate and prolate spheroids from Maxwell's equations

  • toumbous
  • · Replies 1 ·
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1

Undergrad Intuition behind Cauchy–Riemann equations

  • themagiciant95
  • · Replies 12 ·
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12

Discrete dynamical systems - Invertible maps

  • Joppy
  • · Replies 8 ·
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8

Graduate Matched Asymptotic Expansion and stretching variables

  • member 428835
  • · Replies 1 ·
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1

Graduate Laplace Equation for an annular geometry with different BC

  • stockzahn
  • · Replies 7 ·
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7

Graduate Solving a PDE in four variables without separation of variables

  • highflyyer
  • · Replies 4 ·
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4

How Can You Analyze and Solve These Complex Differential Equations?

  • DrWahoo
  • · Replies 2 ·
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2

Graduate Finite Difference solver for 2D Elasticity equations

  • smmr89
  • · Replies 3 ·
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3

Undergrad Can initial conditions for an ODE be given by functions instead of constants?

  • SeM
  • · Replies 10 ·
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10

Undergrad How Can I Solve a Differential Equation with Non-Constant Coefficients?

  • dRic2
  • · Replies 19 ·
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19

Undergrad Convert complex ODE to matrix form

  • SeM
  • · Replies 2 ·
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2

Undergrad Norm of a Functional and wavefunction analysis

  • SeM
  • · Replies 2 ·
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2

High School Solve ODE with Fractional Term: Find Solutions

  • knockout_artist
  • · Replies 2 ·
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2

High School Solving a differential equation with a unit vector in it

  • Alexander350
  • · Replies 13 ·
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13

Undergrad Physics? Setting up PDE for air resistance at high velocity

  • Mr. Fizzix
  • · Replies 2 ·
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2

Inverse and differentation of an equation

  • ertagon2
  • · Replies 16 ·
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16
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1

Undergrad Homogeneous Wave Equation and its Solutions

  • fog37
  • · Replies 3 ·
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3