Re: Inverse????
- To: mathgroup at smc.vnet.net
- Subject: [mg5516] Re: [mg5477] Inverse????
- From: Allan Hayes <hay at haystack.demon.co.uk>
- Date: Sat, 14 Dec 1996 19:26:11 -0500
- Sender: owner-wri-mathgroup at wolfram.com
Hou-shou Chen <houshou at engin.umich.edu>
in [mg5477] Inverse????
asks
>A matrix a={{0,0,1},{0,0,1},{1,1,1}} which is singular in Z_2, but
>Inverse commands gives the "result":
>
> Inverse[a,Modulus->2]=
> {{0, 1, 1}, {1, 1, 0}, {1, 0, 0}}.
>
>Is anything wrong ?
Houshou ,
Yes, and Version 3.0 gives
In[1]:=
Inverse[{{0,0,1},{0,0,1},{1,1,1}},Modulus ->2]
Inverse::sing:
Matrix{{0,0,1},{0,0,1},{1,1,1}} is singular.
Out[1]=
Inverse[{{0,0,1},{0,0,1},{1,1,1}},Modulus -> 2]
Allan Hayes
hay at haystack.demon.co.uk
http://hay at haystack.demon.co.uk