Solve bug in Mathematica 5

• To: mathgroup at smc.vnet.net
• Subject: [mg44010] Solve bug in Mathematica 5
• From: Artūras Acus <acus at itpa.lt>
• Date: Fri, 17 Oct 2003 05:14:38 -0400 (EDT)
• Organization: Institute of Theoretical Physics and Astronomy
• Sender: owner-wri-mathgroup at wolfram.com

```Hi,

The following example demonstrates Mathematica 5.0 "improvements"
in Solve.

lygtys2={E^(a*k*Cot[a*k])*Subscript[A, 1] - Cos[a*k]*Subscript[A, 2] +
Sin[a*k]*Subscript[B, 2] == 0,
-(E^(a*k*Cot[a*k])*k*Cot[a*k]*Subscript[A, 1]) -
k*Sin[a*k]*Subscript[A, 2] -
k*Cos[a*k]*Subscript[B, 2] == 0, Cos[a*k]*Subscript[A, 2] +
Sin[a*k]*Subscript[B, 2] -
E^(a*k*Cot[a*k])*Subscript[B, 3] == 0,
-(k*Sin[a*k]*Subscript[A, 2]) + k*Cos[a*k]*Subscript[B, 2] -
E^(a*k*Cot[a*k])*k*Cot[a*k]*Subscript[B, 3] == 0}

Solve[lygtys2, {Subscript[A, 2], Subscript[B, 2], Subscript[B, 3],
Subscript[A, 1]}]

gives {0,0,0,0}, thought equations are lineary dependent. 4.1 returns
correct rezult.

```

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