Enable contrast version

# Tutor profile: Joseph V.

Inactive
Joseph V.
Professor
Tutor Satisfaction Guarantee

## Questions

### Subject:Set Theory

TutorMe
Question:

How many sizes of infinity are there?

Inactive
Joseph V.

In set theory, the different sizes of infinity are called cardinals. There are infinitely many cardinals.

### Subject:Discrete Math

TutorMe
Question:

What is a totally ordered set?

Inactive
Joseph V.

A totally ordered set is a set where the elements of that set are ordered so that for each pair of elements x,y either x<y or x=y or x>y. For example, the real numbers form a totally ordered set.

### Subject:Calculus

TutorMe
Question:

Does there exist a continuous function which is not differentiable?

Inactive
Joseph V.

Yes. The absolute value function is continuous everywhere, but the absolute value function is not differentiable at (0,0) since the graph of the absolute value function has a sharp change in direction at (0,0).

## Contact tutor

Send a message explaining your
needs and Joseph will reply soon.
Contact Joseph