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# Forum: Differential Equations

Advanced calculus topics from Diff EQ go here.

1. ### Sticky: Read Before Posting!

• Replies: 0
• Views: 14,362
Ted
10-04-2006, 10:13 PM
1. ### 1st- & 2nd-order differential eqns: ds/dt= u-gt, 60 d^2x/dt^2 + 500dx/dt + 900x = 0

• Replies: 1
• Views: 49
Yesterday, 05:27 PM
2. ### Question about a Pertubation Problem: y''+vy^(1/2)+8=x

• Replies: 0
• Views: 33
04-17-2018, 11:29 AM
3. ### Solve the PDE: $u_t + xu_x = -tu, x \in R, t > 0; \: u(x,0) = f(x), x \in R$

• Replies: 0
• Views: 71
04-15-2018, 01:30 AM
4. ### Reduce y'' + y''' Sin(y) = 0 to first order and solve

• Replies: 4
• Views: 1,429
04-13-2018, 09:59 AM
5. ### Laplace transform: steps between f(t)= cos(t-5+5)H(t-5) and f(t)= cos(t-5)cos5 H(t-5)

• Replies: 2
• Views: 139
04-11-2018, 05:31 AM
6. ### Diff-EQ: At time t=0, James was given unknown amount of unknown radioactive substance

• Replies: 2
• Views: 339
04-02-2018, 10:02 AM
7. ### ODE y''+y=4*x*sin x. Guessing particular solution?

• Replies: 5
• Views: 293
03-30-2018, 01:29 PM
8. ### How to solve this linear hom. ODE? (d bar{h})/dt+(K/S_s)a^2 bar{h}=-(K/S_s)aH(h_b)(t)

• Replies: 0
• Views: 523
02-21-2018, 05:29 AM
9. ### verifying definition interval of given differential equation

• Replies: 0
• Views: 179
02-19-2018, 12:49 PM
10. ### Newton's law of Heating and Cooling issues

• Replies: 1
• Views: 409
02-04-2018, 09:07 PM
11. ### Inverse laplace transform, formula help please: L−1[e(-2πs-2s)/(s2-4)]

• Replies: 3
• Views: 1,365
01-08-2018, 11:02 AM
12. ### partial differentials: ∂∂tA(y,t)+6ΛΩ(y2−y)sin(t)=∂2∂y2A(y,t)

• Replies: 1
• Views: 694
12-28-2017, 02:24 PM

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