Re: Mathematica v5 versus v6

*To*: mathgroup at smc.vnet.net*Subject*: [mg83584] Re: Mathematica v5 versus v6*From*: Jon <jkparry at hotmail.com>*Date*: Fri, 23 Nov 2007 05:39:12 -0500 (EST)

Dear All Thank you so far for your comments and help. As yet I have not managed to solve this problem concerned with computing the rank of an 8 by 8 matrix. Some people have asked for a specific example. The matrix which I am having a problem with is not a simple matrix, each element of the matrix is an analytic function and not a simple numerical element. As a result I cannot simply post the matrix here. If you are interested then you can simply reply to my post and I shall email a notebook file containing the matrix to you. The problem I find is that, a matrix which takes a few minutes to have it's rank computed in v5.1 or 5.2 causes v6 to run for 10 times as long without giving an answer. Any help, particularly from people running v6 on 64 bit machines would be very welcome. Thanks again jon