silly newbie questions
- To: mathgroup at smc.vnet.net
- Subject: [mg34385] silly newbie questions
- From: heimantj at celera.com (theiman)
- Date: Fri, 17 May 2002 06:31:22 -0400 (EDT)
- Sender: owner-wri-mathgroup at wolfram.com
Hi,
I have two questions:
(1) I have an equation:
eqn = A'[t] = S - (ln(2)/hl)*A[t]
and I am trying to find the time at which the discontinuity occurs (t1
and t2) and I have sampled at time t. The constraints for the system
are:
S(t)=S if t1<t<t2
S(t)=0 otherwise
The question is: How do I use these constraints with Dsolve?
(2) After I find the solution to the equation in question 1 I would
like to take the laplace transform of the equation (and since it is a
step function I need to use the heaviside (formula/equation?)) and
solve the result. Any ideas on how to do this?
I would really appreciate any help or suggestions!!!!
Thankyou!!
Sincerely,
Tom