[plt-scheme] solution for esercise 11.2.4

From: Matthias Felleisen (matthias at ccs.neu.edu)
Date: Mon Jun 9 17:54:53 EDT 2008

On Jun 9, 2008, at 5:44 PM, carlo ambrogio wrote:

> the data definition is:
> A deep-list (dl) is either
> - s where s is some symbol or
> - (cons dl empty), where dl is a deep list.

Sounds like a plan. Can you show us some data examples? Can you show  
us some functional examples? 

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