# Differential Equations Forum

Differential Equations Help Forum

1. ### DE Tutorial - Part IV: Laplace Transforms

• Replies: 1
• Views: 4,165
Feb 8th 2011, 11:56 PM
2. ### DE Tutorial - Part I: First Order Equations and Homogeneous Second Order Equations

• Replies: 5
• Views: 22,020
Mar 15th 2010, 12:44 PM
3. ### DE Tutorial - Part III: Systems of Differential Equations

• Replies: 2
• Views: 3,929
Aug 29th 2009, 09:03 PM
4. ### DE Tutorial - Part II: Nonhomogenous Second Order Equations and Their Applications

• Replies: 4
• Views: 6,776
Dec 27th 2008, 08:56 AM
1. ### Heat equation? how to solve?

• Replies: 4
• Views: 774
Jun 3rd 2011, 08:36 AM
2. ### dy/dx=e^(-x^2) - 2xy subject to y(2)=0

• Replies: 7
• Views: 6,016
Jun 3rd 2011, 08:22 AM
3. ### non linear systems

• Replies: 1
• Views: 982
Jun 3rd 2011, 03:14 AM
4. ### Invariance and omega/alpha limit sets

• Replies: 0
• Views: 819
Jun 2nd 2011, 10:17 AM
5. ### Eigenfunctions and PDE's

• Replies: 1
• Views: 611
Jun 1st 2011, 09:03 PM
6. ### Modeling a Mass-Spring System

• Replies: 32
• Views: 1,925
Jun 1st 2011, 04:56 AM
7. ### solving a simple DE using the Laplace Transform - am i doing it right?

• Replies: 7
• Views: 593
Jun 1st 2011, 04:49 AM
8. ### Solve (x^2) ( d^2/dx^2) + 3x(dy/dx) + y = 1/x

• Replies: 16
• Views: 1,681
Jun 1st 2011, 12:50 AM
9. ### Finding value of heaviside function at given value of t

• Replies: 1
• Views: 356
May 31st 2011, 07:11 PM
10. ### [SOLVED] Model with First Order Differential Equation

• Replies: 7
• Views: 3,971
May 31st 2011, 06:18 PM
11. ### [SOLVED] 2nd Order Linear PDE: u_xx+2u_yx+5u_yy-2u_x+u=0 - Elliptic

• Replies: 2
• Views: 422
May 31st 2011, 07:05 AM
12. ### Trouble with Power Series and Closed Form Notation

• Replies: 3
• Views: 557
May 31st 2011, 06:33 AM
13. ### general solution and period of osscilation

• Replies: 12
• Views: 533
May 31st 2011, 06:28 AM
14. ### Wave equation help.

• Replies: 7
• Views: 676
May 30th 2011, 10:58 PM
15. ### Systems of differential equations and equilibrium points...

• Replies: 6
• Views: 1,922
May 30th 2011, 02:15 PM
16. ### Laplacian In Cylindrical Coordinates

• Replies: 3
• Views: 1,553
May 30th 2011, 07:14 AM
17. ### Solving a cubic polinomy (from a system of DE's)

• Replies: 5
• Views: 487
May 29th 2011, 12:36 PM
18. ### Green's formula

• Replies: 1
• Views: 677
May 29th 2011, 08:07 AM
19. ### Phase Line & Limits

• Replies: 1
• Views: 505
May 29th 2011, 01:24 AM
20. ### Not getting the right answer in Reduction of Order Problem

• Replies: 5
• Views: 516
May 28th 2011, 04:42 PM
21. ### [SOLVED] Fourier series expansion, need help

• Replies: 1
• Views: 764
May 28th 2011, 04:23 PM
22. ### Simple first order diff. eq

• Replies: 4
• Views: 575
May 28th 2011, 04:20 AM
23. ### 1st order linear equation with integral can not figure out

• Replies: 2
• Views: 446
May 27th 2011, 10:40 AM
24. ### [SOLVED] Substitution to make an ODE linear.

• Replies: 14
• Views: 1,116
May 27th 2011, 09:15 AM
25. ### Question about deleting a value of x.

• Replies: 2
• Views: 525
May 26th 2011, 06:12 AM
26. ### Showing that the energy of a wave doesn't change with time

• Replies: 0
• Views: 695
May 25th 2011, 02:46 PM
27. ### Can't get PDE solution in textbook

• Replies: 3
• Views: 922
May 25th 2011, 11:46 AM
28. ### [SOLVED] Elliptic Canonical Form

• Replies: 2
• Views: 537
May 25th 2011, 07:34 AM
29. ### Two LaPlace Transform problems

• Replies: 4
• Views: 758
May 24th 2011, 04:21 PM

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