Re: Re: what's wrong with these expressions?

*To*: mathgroup at smc.vnet.net*Subject*: [mg104658] Re: [mg104638] Re: [mg104606] what's wrong with these expressions?*From*: DrMajorBob <btreat1 at austin.rr.com>*Date*: Fri, 6 Nov 2009 05:15:35 -0500 (EST)*References*: <200911040641.BAA09061@smc.vnet.net>*Reply-to*: drmajorbob at yahoo.com

You got me. What am I supposed to learn from it? Bobby On Thu, 05 Nov 2009 02:52:16 -0600, <dushanm at spinn.net> wrote: > DrMajorBob writes: > >> No problem here: >> >> {Subscript[n, p][z_], >> Subscript[n, m][z_]} := {{p1[z], p2[z], p3[z]}, {m1[z], m2[z], >> m3[z]}} >> >> {Null, Null} >> >> (* testing *) >> {Subscript[n, p][z], Subscript[n, m][z]} >> >> {{p1[z], p2[z], p3[z]}, {m1[z], m2[z], m3[z]}} >> >> {Subscript[nn, p][z_], >> Subscript[nn, m][z_]} := {Outer[Times, Subscript[n, p][z], >> Subscript[n, p][z]], >> Outer[Times, Subscript[n, m][z], Subscript[n, m][z]]} >> >> {Null, Null} >> >> (* testing *) >> {Subscript[nn, p][z], Subscript[nn, m][z]} >> >> {{{p1[z]^2, p1[z] p2[z], p1[z] p3[z]}, {p1[z] p2[z], p2[z]^2, >> p2[z] p3[z]}, {p1[z] p3[z], p2[z] p3[z], p3[z]^2}}, {{m1[z]^2, >> m1[z] m2[z], m1[z] m3[z]}, {m1[z] m2[z], m2[z]^2, >> m2[z] m3[z]}, {m1[z] m3[z], m2[z] m3[z], m3[z]^2}}} >> >> Bobby > > Okay, so it worked on your system but not on mine. > > Why? I'm not sure what I'm supposed to have learned from this. > > - Dushan > > >> On Wed, 04 Nov 2009 00:41:31 -0600, dushan <dushanm at spinn.net> wrote: >> >>> I defined two 3-D vector functions, >>> {Subscript[n,p][z_], Subscript[n,m][z_]} := {{p1[z],p2[z],p3[z]}, >>> {m1[z],m2[z],m3 >>> [z]}} >>> where p? and m? are simple functions of z. When displayed they appear >>> as expected. But when I tried to define the dyadics >>> {Subscript[nn,p][z_], Subscript[nn,m][z_]} := >>> {Outer[Times, Subscript[n,p][z], Subscript[n,p] >>> [z]], >>> Outer[Times, Subscript[n,m][z], Subscript[n,m] >>> [z]]} >>> I got the error message that the expression 'is incomplete, more input >>> is needed'. > -- DrMajorBob at yahoo.com

**References**:**what's wrong with these expressions?***From:*dushan <dushanm@spinn.net>