1

This question comes from this post.

This figure is trying to illustrate 4 spaces defined by 4 different set of standard basis.

In mathematics, the standard basis (also called natural basis) for a Euclidean space is the set of unit vectors pointing in the direction of the axes of a Cartesian coordinate system.

if "set" is countable, the OP description would be 4 different sets of standard basis, so, is "set" here countable or not?

2

It should be "sets", plural.

This figure is trying to illustrate 4 spaces defined by 4 different sets of standard basis.

A Venn diagram shows intersection and union of sets, for example.

Sets are indeed countable.

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy