       RE: Equal and operation with list

• To: mathgroup at smc.vnet.net
• Subject: [mg29511] RE: [mg29491] Equal and operation with list
• From: "Higinio Ramos" <higra at gugu.usal.es>
• Date: Sat, 23 Jun 2001 01:46:52 -0400 (EDT)
• Organization: usal
• References: <200106220620.CAA24439@smc.vnet.net>
• Sender: owner-wri-mathgroup at wolfram.com

```----- Original Message -----
From: Guillermo Sanchez <guillerm at gugu.usal.es>
To: mathgroup at smc.vnet.net
Subject: [mg29511] [mg29491] Equal and operation with list

> I  have tree list:
>
> Y = {y1, y2}
> B = {{b11,b12} , {b21, b22}}
> X = {X1, X2}
>
> I wish transform its in a system of equations like this:
>
> {y1== b11 X1 + b12 X2, y2== b21 X1 + b22 X2}
>
> I have test with Y == Dot[B,X] but don`t work. Any help?. Thanks
>

The result obtained with Y == Dot[B,X], or simply Y== B.X, that is
{y1, y2} == {b11 X1 + b12 X2, b21 X1 + b22 X2}
is the same system of equations that you refer,
{y1== b11 X1 + b12 X2, y2== b21 X1 + b22 X2}.
But if you prefer this second form you may do
{Y[] == (B.X)[], Y[] == (B.X)[]}.

Higinio

```

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