Re: The orde of product
- To: mathgroup at smc.vnet.net
- Subject: [mg123414] Re: The orde of product
- From: "Nasser M. Abbasi" <nma at 12000.org>
- Date: Tue, 6 Dec 2011 03:13:27 -0500 (EST)
- Delivered-to: l-mathgroup@mail-archive0.wolfram.com
- References: <jbk5ta$g3c$1@smc.vnet.net>
- Reply-to: nma at 12000.org
On 12/5/2011 10:32 PM, =E9=81=93 =E5=8E=9A wrote: > How can I do that a*b is unequal to b*a in Mathematica 7? > Thank you. > For any 'a' and any 'b' ? Even if 'a' say was an integer and 'b' is also an integer? What type of 'product' is '*' in the above If 'a' and 'b' are just free symbols, then a*b is the same as b*a, but if they are say matrices and your '*' is a matrix product, then a.b is not necessarily the same as b.a May be if you say why you wanted 'a*b*' not to be the same as 'b*a', you could get better help to solve your original issue which lead you to ask this. --Nasser