Re: Matrix Operator form using Mathematica

*To*: mathgroup at smc.vnet.net*Subject*: [mg53216] Re: Matrix Operator form using Mathematica*From*: "Steve Luttrell" <steve_usenet at _removemefirst_luttrell.org.uk>*Date*: Thu, 30 Dec 2004 01:38:27 -0500 (EST)*References*: <cqtc4e$7ic$1@smc.vnet.net>*Sender*: owner-wri-mathgroup at wolfram.com

Oops! I missed out a # from my first reply: One way to do this is to define a matrix-valued function aone={{-#,0},{0,D[#,{x,2}]}}& so that (for instance) evaluating aone[Tan[x]] gives the result {{-Tan[x], 0}, {0, 2*Sec[x]^2*Tan[x]}} Steve Luttrell "Pratik Desai" <pdesai1 at umbc.edu> wrote in message news:cqtc4e$7ic$1 at smc.vnet.net... > > Hello all, > > How do I define an operator embedded in a matrix and functions > as...well........an operator > > azero={{0,1},{1,0.05}}; > aone={{-1,0},{0,(k)}}; > (*k is the second order differential operator with respect to x d,xx, Is > there a way to define this in mathematica *) > > > Thanks > > Pratik Desai >

**Follow-Ups**:**Re: Re: Matrix Operator form using Mathematica***From:*"Pratik Desai" <pdesai1@umbc.edu>