`sin^2x + cos^2x = 1`
`y = frac (-b +- sqrt(b^2 - 4ac)) (2a)`
`(x + 2)^2 + (y - 3)^2 = 16`
`slope = m = frac (\text(change in y)) (\text(change in x)) = frac (Deltay) (Deltax)`

Get Math Help!

Interesting and Fun Math Articles

Math with Bad Drawings

Lover of math. Bad at drawing.

Puzzle Planet.

( Mar-11-2026)

A new book needs you.... Read more


Curves to curve by.

( Oct-30-2025)

A guide for teachers looking to fix up their test scores.... Read more


10 best triangles of the 21st century (so far).

( Oct-14-2025)

The definitive ranking.... Read more


Oxbridge of America

( Sep-23-2025)

A plea, not to end snap judgments, but merely to better calibrate them.... Read more


Is math discovered or invented?

( Aug-25-2025)

Four completely satisfying answers.... Read more


The mathematics of “are we there yet?”

( Aug-18-2025)

Will the Marvel Cinematic Universe outlast human civilization? Unlikely, but not impossible.... Read more

Math with Bad Drawings

Lover of math. Bad at drawing.

Puzzle Planet.

( Mar-11-2026)

A new book needs you.... Read more


Curves to curve by.

( Oct-30-2025)

A guide for teachers looking to fix up their test scores.... Read more


10 best triangles of the 21st century (so far).

( Oct-14-2025)

The definitive ranking.... Read more


Oxbridge of America

( Sep-23-2025)

A plea, not to end snap judgments, but merely to better calibrate them.... Read more


Is math discovered or invented?

( Aug-25-2025)

Four completely satisfying answers.... Read more


The mathematics of “are we there yet?”

( Aug-18-2025)

Will the Marvel Cinematic Universe outlast human civilization? Unlikely, but not impossible.... Read more

Invalid RSS feed URL.

Math with Bad Drawings

Lover of math. Bad at drawing.

Puzzle Planet.

( Mar-11-2026)

A new book needs you.... Read more


Curves to curve by.

( Oct-30-2025)

A guide for teachers looking to fix up their test scores.... Read more


10 best triangles of the 21st century (so far).

( Oct-14-2025)

The definitive ranking.... Read more


Oxbridge of America

( Sep-23-2025)

A plea, not to end snap judgments, but merely to better calibrate them.... Read more


Is math discovered or invented?

( Aug-25-2025)

Four completely satisfying answers.... Read more


The mathematics of “are we there yet?”

( Aug-18-2025)

Will the Marvel Cinematic Universe outlast human civilization? Unlikely, but not impossible.... Read more

Math with Bad Drawings

Lover of math. Bad at drawing.

Puzzle Planet.

( Mar-11-2026)

A new book needs you.... Read more


Curves to curve by.

( Oct-30-2025)

A guide for teachers looking to fix up their test scores.... Read more


10 best triangles of the 21st century (so far).

( Oct-14-2025)

The definitive ranking.... Read more


Oxbridge of America

( Sep-23-2025)

A plea, not to end snap judgments, but merely to better calibrate them.... Read more


Is math discovered or invented?

( Aug-25-2025)

Four completely satisfying answers.... Read more


The mathematics of “are we there yet?”

( Aug-18-2025)

Will the Marvel Cinematic Universe outlast human civilization? Unlikely, but not impossible.... Read more

Joel David Hamkins

mathematics and philosophy of the infinite

A potentialist perspective on ultrafinitism, Ohio University

( Apr-23-2026)

This will be a talk at the Philosophy department of Ohio University in Athens, OH on April 30th, 2026. I am very grateful for the invitation. Abstract. Ultrafinitism is the philosophical view that only comparatively small or accessible numbers exist. … Continue reading ... Read more


The spectrum of consistency strengths for membership in a computably enumerable set, Notre Dame Logic Seminar, April 2026

( Apr-04-2026)

This will be a talk for the Logic Seminar at the University of Notre Dame, 14 April 2026, 2pm, Room 125 Hayes-Healey. Abstract After establishing several  general features of the hierarchy of consistency strength, we shall consider the possible spectrum … Continue reading ... Read more


The Book of Infinity, MIT Press, 2026

( Mar-28-2026)

I am very pleased to announce that The Book of Infinity is now available for pre-order. Check it out at your favorite booksellers. From the preface: Come, let us explore infinity! We shall visit all my favorite paradoxes and conundrums. The ancient … Continue reading ... Read more


Truth and paradox in the theory of finite and infinite games, Owens Memorial Lecture, Wayne State University, April 2026

( Feb-12-2026)

I am honored to be invited to give the Owen G. Owens Memorial Lecture at Wayne State University on 16 April 2026, joining a distinguished list of luminaries giving previous Owens lectures, including Gregory Margulis, John Milnor, Mikhael Gromov, John … Continue reading ... Read more


Mathematicians do not agree on the essential structure of the complex numbers, ASL/APA Central Division Meeting, Chicago, February 2026

( Feb-11-2026)

I have been asked by the ASL to fill in as a last-minute substitute speaker for the ASL session at the upcoming 2026 APA Central Division Meeting in Chicago, February 18-21, 2026, due to a late cancellation of one of … Continue reading ... Read more


Surreal arithmetic is bi-interpretable with set theory, CUNY Logic Workshop, March 2026

( Feb-04-2026)

This will be a talk at the CUNY Logic Workshop on 13 March 2026, held at the CUNY Graduate Center. Abstract. I shall introduce the elementary theory of surreal arithmetic (SA), a first-order theory that is true in the surreal field when equipped with … Continue reading ... Read more

Joel David Hamkins

mathematics and philosophy of the infinite

A potentialist perspective on ultrafinitism, Ohio University

( Apr-23-2026)

This will be a talk at the Philosophy department of Ohio University in Athens, OH on April 30th, 2026. I am very grateful for the invitation. Abstract. Ultrafinitism is the philosophical view that only comparatively small or accessible numbers exist. … Continue reading ... Read more


The spectrum of consistency strengths for membership in a computably enumerable set, Notre Dame Logic Seminar, April 2026

( Apr-04-2026)

This will be a talk for the Logic Seminar at the University of Notre Dame, 14 April 2026, 2pm, Room 125 Hayes-Healey. Abstract After establishing several  general features of the hierarchy of consistency strength, we shall consider the possible spectrum … Continue reading ... Read more


The Book of Infinity, MIT Press, 2026

( Mar-28-2026)

I am very pleased to announce that The Book of Infinity is now available for pre-order. Check it out at your favorite booksellers. From the preface: Come, let us explore infinity! We shall visit all my favorite paradoxes and conundrums. The ancient … Continue reading ... Read more


Truth and paradox in the theory of finite and infinite games, Owens Memorial Lecture, Wayne State University, April 2026

( Feb-12-2026)

I am honored to be invited to give the Owen G. Owens Memorial Lecture at Wayne State University on 16 April 2026, joining a distinguished list of luminaries giving previous Owens lectures, including Gregory Margulis, John Milnor, Mikhael Gromov, John … Continue reading ... Read more


Mathematicians do not agree on the essential structure of the complex numbers, ASL/APA Central Division Meeting, Chicago, February 2026

( Feb-11-2026)

I have been asked by the ASL to fill in as a last-minute substitute speaker for the ASL session at the upcoming 2026 APA Central Division Meeting in Chicago, February 18-21, 2026, due to a late cancellation of one of … Continue reading ... Read more


Surreal arithmetic is bi-interpretable with set theory, CUNY Logic Workshop, March 2026

( Feb-04-2026)

This will be a talk at the CUNY Logic Workshop on 13 March 2026, held at the CUNY Graduate Center. Abstract. I shall introduce the elementary theory of surreal arithmetic (SA), a first-order theory that is true in the surreal field when equipped with … Continue reading ... Read more