I was confused about zero dimension vector subspaces. Can you please answer the following questions with details/examples.
What is the dimension and basis for vector space that is just composed of the zero vector.
If the answer to the latter is an empty set, how can I construct a zero vector of say n rows from the empty set?
Say there are three vector spaces
 [0, 0] [0 ,0, 0]. What are the basis for them. Isn't just saying empty set led to ambiguity about the zero vector subspace, it is a basis for?