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notation

• To: mathgroup at yoda.physics.unc.edu
• Subject: notation
• From: deb at alexandria.lcs.mit.edu (David E. Burmaster)
• Date: Sat, 13 Nov 93 09:02:37 -0500

Dear MathGroup,

In his new book on Differential Geometry, Alfred Gray uses the notation

	f[a_] [x_] := a x

where a is a parameter and x is a variable.

This notation puzzles me. It obviously works well, but I do not 
understand the pros and cons of using that notation instead of the 
more standard

	f[a_, x_] := a x

Any thoughts or explanations??

Thanking you in advance
Dave
David E. Burmaster
Alceon Corporation