Re: sylvester_matrix?

[Rik]

On 05/01/2011 01:18 PM, Svante Signell wrote:
> On Sun, 2011-05-01 at 12:20 -0700, Rik wrote:
>> 5/1/11
>>
>> John,
>>
>> I just reviewed the documentation on Famous Matrices and there is a
>> function (sylvester_matrix) which produces a matrix form that I was unable
>> to verify.  The form that Wikipedia documents
>> (http://en.wikipedia.org/wiki/Sylvester_matrix) is more akin to toeplitz or
>> hankel in that it starts with two input polynomials, rather than a single
>> scalar input.  Do you have a better idea about what this function is
>> actually creating?
> 
> Looks like this matrix is the same as the Hadamard matrix, i.e.
> sylvester_matrix(k) = hadamard(2^k).
5/1/11

Since that is the case (I verified), I think we should deprecate
sylvester_matrix.  There is no equivalent in the Matlab core and hadamard
does exist in both Octave and Matlab core.

--Rik