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Re: Head logic

• To: mathgroup at smc.vnet.net
• Subject: [mg97138] Re: Head logic
• From: carlos at colorado.edu
• Date: Fri, 6 Mar 2009 04:25:03 -0500 (EST)
• References: <goj2bk$2qu$1@smc.vnet.net> <golr82$qip$1@smc.vnet.net>

Thanks for a very detailed explanation.  From this I gather than
Head[<something>] is not a variable or a value.
So Times==Plus returns unevaluated.