erratum: chapter 4

[khosrogh]

• Page 83: in the numbered list, at number 2, Mapping' definition, it reads: "Any operation that can run independently on a split is called a map. In the preceding diagram, the map operation coverts ..."
  I think there is a typo for the word coverts should be converts. Would you please check this?

• Page 86: in the greedy algorithm defining list number 2, it is talked about Union(S, e). I couldn't find out what is e?
  A bit of definition would suffice.

• Page 88: do the code in the middle of the page is complete?
  I think there are at least two misplaced lines of code and need changes:

for i in range(len(aTour)))
and
for c in range(number_of_cities))

[rajat-packt]

Hey @khosrogh, sorry for such long delay.
We were finally able to confirm with the author, all your suggestions have been valid and will we update the readme file to reflect the same.

As for the missing definition on Page 86, the author has provided this explanation:

Union(S,e)
e is the delta corresponding to the element k that we are adding to converge the solution

With this we'll be closing all the issues after updating the readme.
Thanks for reaching out to us!

[khosrogh]

Hi @rajat-packt,

It's OK. Anytime. <3