Multiple FindRoot
- To: mathgroup at smc.vnet.net
- Subject: [mg109787] Multiple FindRoot
- From: EF <he.frauendorfer at t-online.de>
- Date: Tue, 18 May 2010 02:00:03 -0400 (EDT)
Find Lambda Values for Tan[Lambda] == -([Lambda]/h) and e.g. h = 0.5
the first 10 Lambda Values for h = 0.5 are
In[27]:=Lambda =
Out[27]= {1.837, 4.816, 7.917, 11.04, 14.17, 17.31, 20.44, 23.58, 26.72,
29.86}
My solution requires
1) FindRoot for a wide range of starting (ending) values
2) Eliminate the great number of double real solutions
3) Verify solutions, there are "some" wrong values
Is there a more direct way to the correct lambda values?
E.F.