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Making a new definition of Equal work with lists as well

• To: mathgroup at smc.vnet.net
• Subject: [mg63361] Making a new definition of Equal work with lists as well
• From: "Dan Bernstein" <dan.bernstein at gmail.com>
• Date: Mon, 26 Dec 2005 04:59:23 -0500 (EST)
• Sender: owner-wri-mathgroup at wolfram.com

Hi,

I have defined
Equal[a_CL,b_CL] := a[[1]]-a[[2]] == b[[1]]-b[[2]]
and then
CL[2,3] == CL[4,5]
CL[2,3] == CL[2,4]
evaluate to True and False respectively, as expected. However,
{CL[2,3]} == {CL[4,5]}
just stays in that form.

What should I do to make list equality use my "CL equality"?

Thanks in advance,
-- Dan Bernstein