deletions | additions       diff --git a/Question 3.md b/Question 3.md  index 017105a..09c289d 100644  --- a/Question 3.md  +++ b/Question 3.md 
...
X_{i} \X_{i}\  is arc-consistent with respect to another variable X_{j} \X_{j}\  if for every value in the current domain /D_{i}/ \D_{i}\  there is some value in the domain /D_{j}/ \D_{j}\  that satisfies the binary constraint on the arc (/X_{i}/,/X_{j}/) (\X_{i}\,\X_{j}\)