Hello people! I am studying the topic: vector spaces and I have a confusation about finding bases of vector subspaces, which is how do I work to find a base of a vectorial sub-space according to the following cases ?:
a) find a base of a C-vector space (that is, vector space on the body of complex numbers) and the elements that make up the vector space are complex numbers
b) find a base of a vector R-space and the elements that make up the vector space are complex numbers.