Exercise 2.7

Printer-friendly versionPrinter-friendly version

Alyssa’s program is incomplete because she has not specified the implementation of the interval abstraction. Here is a definition of the interval constructor:

(define (make-interval a b) (cons a b))

Define selectors upper-bound and lower-bound to complete the implementation.


The focus is on the sale of BirkenstockBirkenstock outlet shoes. At Birkenstock you will find whatever you are lookingbirkenstock kairo for within the huge choice of sandals,Birkenstock sale clogs, insoles and exquisite shoes. You would likearmani watches something fashionable and exclusive? Then the Birkenstock shoes designed by an international top model are just right forarmani watches uk you. Of course, it is not just the fashionable design thatarmani ceramica is convincing, but also high-class materials, accurate workmanship and environmentally friendly production.birkenstock Just typically outstanding quality “made by Birkenstock” and moreoverbirkenstock homme “made in Germany”. As in every Birkenstock shoe therebirkenstock soldes is the experience of 230 years of shoe manufacture. Articles, materials and production procedures are continuously being developped and enhanced. Thus Birkenstock will always be able to provide outstanding quality and pleasure when walking.

Oh my goodness! an amazing article dude. Thank you However I’m experiencing challenge with ur rss
. Don

Post new comment

  • Web page addresses and e-mail addresses turn into links automatically.
  • Allowed HTML tags: <a> <em> <strong> <cite> <code> <pre> <hr> <ul> <ol> <li> <dl> <dt> <dd> <img>
  • Lines and paragraphs break automatically.
  • Adds typographic refinements.

More information about formatting options