Re: differential equation

*To*: mathgroup at smc.vnet.net*Subject*: [mg4424] Re: differential equation*From*: "Kevin J. McCann" <kjm at ravel.jhuapl.edu>*Date*: Mon, 22 Jul 1996 00:29:25 -0400*Organization*: Johns Hopkins University Applied Physics Lab, Laurel, MD, USA*Sender*: owner-wri-mathgroup at wolfram.com

Poon Ming Yan (pmhui) wrote: ... > I have a differential equation to solve, which is > > f''(x) + f(x)( A*cos[B*x] - K ) == 0 > > where A,B and K are constants. > > Is it a mathieu equation ?? ... Check out Abramowitz and Stegun Handbook of Mathematical Functions ("Big Red") Chapter 20: Mathieu DE: y'' + [a - 2q cos(2x)]y=0 is the canonical form. Kevin -- email: kjm at ravel.jhuapl.edu snailmail: Kevin J. McCann Johns Hopkins University APL Johns Hopkins Road Laurel MD 20723-6099 phone: (301) 953-5476 fax: (301) 953-5950 --------------------------------------------------------------------- The difference between science and the fuzzy subjects is that science requires reasoning while those other subjects merely require scholarship. -- Robert Heinlein --------------------------------------------------------------------- ==== [MESSAGE SEPARATOR] ====