# 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.

Answer:

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.

Answer:

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.

Answer:

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.

needs and Joseph will reply soon.

Contact Joseph

## Request lesson

Ready now? Request a lesson.

Start Lesson

## FAQs

What is a lesson?

A lesson is virtual lesson space on our platform where you and a tutor can communicate.
You'll have the option to communicate using video/audio as well as text chat.
You can also upload documents, edit papers in real time and use our cutting-edge virtual whiteboard.

How do I begin a lesson?

If the tutor is currently online, you can click the "Start Lesson" button above.
If they are offline, you can always send them a message to schedule a lesson.

Who are TutorMe tutors?

Many of our tutors are current college students or recent graduates of top-tier universities
like MIT, Harvard and USC.
TutorMe has thousands of top-quality tutors available to work with you.