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

Undergrad Trouble with needless of absolute value

  • mech-eng
  • · Replies 3 ·
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3

How Can You Solve This Separation of Variables Problem?

  • cheatmenot
  • · Replies 7 ·
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7

Graduate EPQ: Mathematical model of tea bag diffusion

  • Planckian
  • · Replies 24 ·
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24

Graduate Question on How energy equation is presented in Diff form

  • thunderspeed
  • · Replies 1 ·
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1

Graduate Nonlinear conduction,where thermal conductivity depends on temparature

  • annie.1991
  • · Replies 7 ·
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7

Graduate Gradient Descent and Cauchy Method in Differential Equations

  • kidsasd987
  • · Replies 1 ·
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1

Undergrad How do I find this answer on TI-89 calculator?

  • Math10
  • · Replies 2 ·
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2

Find Real Valued Functions: g(x)^2=Int+(1990)

  • anemone
  • · Replies 3 ·
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3

Graduate Gradient Question: Why Does Direction Maximize Function?

  • kidsasd987
  • · Replies 2 ·
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2

Graduate Math Biology Experiment: Analyzing Cell Turnover Rates in Different Ages

  • csb
  • · Replies 1 ·
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1

Looking for Online Bifurcation Plotting Tools?

  • ion santra
  • · Replies 1 ·
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1

Graduate Green's function in n-dim, but with one independent variable.

  • center o bass
  • · Replies 1 ·
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1

Graduate Does Negative Divergence of Gradient Temperature Lead to the Laplace Equation?

  • range.rover
  • · Replies 1 ·
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1

Angle change rate is a function of the instantaneous angle

  • zshaban
  • · Replies 4 ·
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4

Undergrad How is the Delta Distribution the Derivative of a Step Function?

  • ayan
  • · Replies 14 ·
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14

Graduate Need help solving a differential equation for orbit.

  • ScienceVSmath
  • · Replies 2 ·
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2

Graduate Finite Differences-Semi discretization method on Heat Equation

  • Juan Carlos
  • · Replies 2 ·
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2

Graduate Initial condition effect in Nonlinear PDE of a wave

  • Romik
  • · Replies 2 ·
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2

Graduate Understanding Uniqueness and Existence Theorems for ODE's

  • manimaran1605
  • · Replies 3 ·
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3

Graduate Convergence of perturbative solutions to a non-linear diff eq

  • Strum
  • · Replies 1 ·
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1

Graduate Rotation of coordinates (context of solving simple PDE)

  • chipotleaway
  • · Replies 4 ·
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4

Graduate Existence and Uniqueness Theorem

  • Bashyboy
  • · Replies 1 ·
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1

Graduate How can y be solved for given x and all A coefficients in the transfer function?

  • woo78f
  • · Replies 1 ·
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1

Graduate Fourier Series Convergence Criterion

  • Chacabucogod
  • · Replies 2 ·
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2

Graduate Runge-Kutta Method - Need help with the calculus

  • matematikawan
  • · Replies 4 ·
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4

High School Is this a differential equation?

  • johann1301
  • · Replies 3 ·
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3

Graduate Notation Question (Differential Equations)

  • dkotschessaa
  • · Replies 2 ·
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2

Population Growth: US Carrying Capacity & Predictions

  • ineedhelpnow
  • · Replies 33 ·
2
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33

Logistic model/initial value problem

  • ineedhelpnow
  • · Replies 3 ·
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3

Graduate Finding the first integral for equations of motion

  • Elodin
  • · Replies 2 ·
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2

Graduate Solution that doesn't diverge at origin

  • jimjam1
  • · Replies 3 ·
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3

How Does Newton's Law of Cooling Apply to a Roast Turkey's Temperature?

  • ineedhelpnow
  • · Replies 6 ·
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6

Graduate Solving tricky functional equation

  • Frogeyedpeas
  • · Replies 1 ·
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1

Graduate Associated Legendre Polynomial Identity

  • HasuChObe
  • · Replies 2 ·
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2

Modeling with Differential Equations

  • ineedhelpnow
  • · Replies 17 ·
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17

Graduate Solving Non-Linear ODEs with RK4 Method: Time Step Considerations

  • RandomGuy88
  • · Replies 2 ·
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2

Differential equations and initial value problems

  • ineedhelpnow
  • · Replies 4 ·
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4

Estimate $y(0.5)$ using Euler's Method

  • ineedhelpnow
  • · Replies 10 ·
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10

Solving a Linear Equation with Initial Condition: $2xy'+y=6x$, $x>0$, $y(4)=20$

  • ineedhelpnow
  • · Replies 18 ·
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18

Undergrad Is It Possible to Use the Method of Undetermined Coefficients Here?

  • checkmatechamp
  • · Replies 1 ·
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1

Graduate Power series and Laplace transform

  • ricard.py
  • · Replies 2 ·
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2

Graduate Solving a First Order Inhomogeneous ODE for a Regular LR Circuit with AC Voltage

  • Waxterzz
  • · Replies 2 ·
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2

Differential Equations: Direction Field

  • ineedhelpnow
  • · Replies 7 ·
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7

Graduate Numerical methods for differential equations

  • SarthakC
  • · Replies 8 ·
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8

Undergrad Calculating Ozone Levels in a Room Using the Half-Life Equation

  • beamthegreat
  • · Replies 13 ·
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13

Undergrad Relationship integration math problem

  • MisterX
  • · Replies 2 ·
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2

Graduate Why do we get oscillations in Euler's method of integration and what i

  • ErezAgh
  • · Replies 3 ·
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3

Undergrad Derivative of a fraction inside a radical

  • ehh
  • · Replies 2 ·
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2

Graduate Help plotting interacting Turing modes

  • jssdenton72
  • · Replies 2 ·
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2

Graduate Writing y′′+P(x)y′+Q(x)y=g(x) as a Fredholm Integral Equation

  • bolbteppa
  • · Replies 1 ·
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1

Graduate Discretization in cylindrical coordinates, unit thickness for azimuth?

  • geetar_king
  • · Replies 2 ·
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2

Graduate Asymptotes of an implicit function?

  • lavoisier
  • · Replies 3 ·
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3

Graduate Solving PDE for F and F' in 2D Space: Relation between Variables x, t and t

  • Arjun S
  • · Replies 1 ·
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1

Graduate Desperately seeking help with solving a differential equation

  • hushish
  • · Replies 20 ·
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20

Johnsy's question via Facebook

  • Prove It
  • · Replies 1 ·
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1

Graduate Is the Uniqueness of IVP Solutions Always Binary?

  • kochibacha
  • · Replies 1 ·
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1

Graduate Orthogonality condition for Airy functions

  • skujesco2014
  • · Replies 2 ·
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2

Gibbs Phenomenon:The maxima get smaller,the minima get bigger

  • mathmari
  • · Replies 1 ·
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1

Proof of the strong maximum principle

  • mathmari
  • · Replies 13 ·
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13

Graduate How to study feedback? Which branch of Mathematics does it?

  • jonjacson
  • · Replies 8 ·
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8

Undergrad Why is the solution in the form of Ce^kx ?

  • joo
  • · Replies 2 ·
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2

Graduate Partial Differential Equation with initial conditions

  • alex12
  • · Replies 1 ·
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1

Graduate What is the proof for this property of solutions?

  • ShayanJ
  • · Replies 4 ·
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4

Graduate A question about uniqueness of initial conditions

  • mech-eng
  • · Replies 2 ·
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2

Graduate Geometrical interpretation of this property

  • brunob
  • · Replies 2 ·
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2

Undergrad A question on second order linear equations

  • mech-eng
  • · Replies 6 ·
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6

Graduate Laplace transform with Heaviside function

  • ptrinka
  • · Replies 3 ·
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3

The eigenvalues are real and that the eigenfunctions are orthogonal

  • mathmari
  • · Replies 2 ·
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2

Method of characteristics-How can I continue?

  • mathmari
  • · Replies 4 ·
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4

Undergrad Can you study differential equations without finishing integral calcul

  • thedailyshoe
  • · Replies 3 ·
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3

Graduate Solutions of second order linear PDEs

  • saminator910
  • · Replies 4 ·
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4

Mesh Currents with Differential Equations

  • madbo517
  • · Replies 1 ·
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1

How to Solve for \(x\) and \(y\) in a System of Linear ODEs?

  • kalish1
  • · Replies 4 ·
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4

Undergrad A quick simple derivatives question

  • comiconor
  • · Replies 2 ·
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2

Graduate Proportionality with more than one variable?

  • kochibacha
  • · Replies 3 ·
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3

Graduate Geometric interpretation for d²f/dxdy

  • Jhenrique
  • · Replies 3 ·
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3

Need explanation-hyperbolic system of equations

  • mathmari
  • · Replies 6 ·
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6

Graduate How to numerically solve a PDE with delta function boundary condition?

  • Only a Mirage
  • · Replies 3 ·
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3

Graduate Planetary motion equations integral

  • cr7einstein
  • · Replies 2 ·
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2

Undergrad Orthogonality of sine and cosine question

  • Tikkelsen
  • · Replies 3 ·
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3

How do we conclude to the last relation?

  • mathmari
  • · Replies 3 ·
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3

Undergrad Why is f(y,t+h) Equal to y(t+2) in Implicit Euler Method?

  • porcupineman23
  • · Replies 3 ·
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3

Graduate Finding Solutions for ar''(t) + br'(t) + cr(t) = 0 with Vector r

  • Jhenrique
  • · Replies 4 ·
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4

How Do I Convert a Bernoulli Differential Equation to Linear Form?

  • stripedcat
  • · Replies 14 ·
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14

Where Is the Error in Solving the Heat Equation in Infinite Space?

  • mathmari
  • · Replies 2 ·
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2

Graduate Where Can I Find a Proof for the Wronskian Formula?

  • zaybu
  • · Replies 3 ·
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3

Do I have to find separately T_1, T_3 and T_n for n = 1,3?

  • mathmari
  • · Replies 5 ·
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5

Confirming what I learned, a follow up differential equation

  • stripedcat
  • · Replies 2 ·
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2

Why should the solution be periodic?

  • mathmari
  • · Replies 16 ·
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16

Show that this is not a Sturm-Liouville problem

  • mathmari
  • · Replies 45 ·
2
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45

Normal form of the differential equation

  • mathmari
  • · Replies 24 ·
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24
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1

Differental Equation Question, Particular Solutions?

  • stripedcat
  • · Replies 7 ·
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7

Why is a boundary condition at x=0 redundant for this Cauchy problem?

  • onie mti
  • · Replies 1 ·
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1

Gibbs Phenomenon: Investigating Fourier Series of a Discontinuity

  • mathmari
  • · Replies 2 ·
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2

How are the Hermite Polynomials Defined and Calculated?

  • DreamWeaver
  • · Replies 3 ·
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3

Graduate Fourier-Laplace transform of mixed PDE?

  • ThatsRightJack
  • · Replies 2 ·
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2

Looking at a solitary initial state

  • simo1
  • · Replies 1 ·
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1

Graduate Looking for a function in system of DE

  • sludger13
  • · Replies 2 ·
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2

Problem with linear differential equation

  • stripedcat
  • · Replies 4 ·
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4