Be sure to let us know how you solved it in the comments below or on social media!

## Thursday, April 19, 2018

### Advanced Knowledge Problem of the Week 4-19-18: Contour Integral [Complex Analysis]

Check out this Advanced Knowledge Problem of the Week.

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Solution below.

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## Tuesday, April 17, 2018

### Problem of the Week 4-17-18: Fraction Representations [Algebra]

Check out this Problem of the Week.

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Solution below.

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## Thursday, April 12, 2018

### A Week of Singularities: April 17-22, 2018: An AMS Special Session + satellite events

**Tuesday-Thursday, April 17-19: Lecture series by Bernard Teissier and Paolo Aluffi at the Worldwide Center of Mathematics**

- Tuesday, April 17, 3-4pm, Bernard Teissier: "A geometric introduction to valuation theory via infinite dimensional algebraic geometry, Part 1"
- Tuesday, April 17, 4:30-5:30pm, Bernard Teissier: "A geometric introduction to valuation theory via infinite dimensional algebraic geometry, Part 2"
- Wednesday, April 18, 3-4pm, Bernard Teissier: "A geometric introduction to valuation theory via infinite dimensional algebraic geometry, Part 3"
- Wednesday, April 18, 4:30-5:30pm, Paolo Aluffi: "Segre classes and other intersection-theoretic invariants of singular schemes, Part 1"
- Thursday, April 19, 3-4pm, Paolo Aluffi: "Segre classes and other intersection-theoretic invariants of singular schemes, Part 2"
- Thursday, April 19, 4:30-5:30pm, Paolo Aluffi: "Segre classes and other intersection-theoretic invariants of singular schemes, Part 3"

Links:

A Week of Singularities:

Center of Math Research:

### Advanced Knowledge Problem of the Week 4-12-18: Cofinite Topology Compactness [Topology]

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Solution below.

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## Tuesday, April 10, 2018

### Problem of the Week 4-10-18: Polynomial Zero's [Polynomials]

Check out this Problem of the Week.

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Solution below.

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## Thursday, April 5, 2018

### Advanced Knowledge Problem of the Week 4-5-18: Laurent Series at Infinity [Complex Analysis]

Check out this Advanced Knowledge Problem of the Week.

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Solution below.

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## Tuesday, April 3, 2018

### Problem of the Week 4-3-18: Polynomial Root Product Minimum [Polynomials]

Check out this Problem of the Week.

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Solution below.

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## Thursday, March 29, 2018

### Advanced Knowledge Problem of the Week 3-29-18: Cauchy's Mean-Value Theorem [Real Analysis]

Be sure to let us know how you solved it in the comments below or on social media!

## Monday, March 26, 2018

### Problem of the Week 3-27-18: Area Parity [Number Theory]

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## Friday, March 23, 2018

### Advanced Knowledge Problem of the Week 3-23-18: Quotient Rings [Abstract Algebra]

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## Tuesday, March 20, 2018

## Monday, March 19, 2018

### Problem of the Week 3-20-18: Same Last Three Digits [Number Theory]

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## Friday, March 16, 2018

### Advanced Knowledge Problem of the Week 3-16-18: Mobius Function Sums [Number Theory]

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## Monday, March 12, 2018

### Problem of the Week 3-13-18: Inverting Functional Equation [Functional Equations]

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## Thursday, March 8, 2018

### Advanced Knowledge Problem of the Week 3-8-18: Cyclic Quotient Groups [Group Theory]

Be sure to let us know how you solved it in the comments below or on social media!

## Wednesday, March 7, 2018

### Worldwide Lecture Seminar Series: Pablo SoberĂ³n

# Worldwide Lecture Seminar Series: Pablo SoberĂ³n

### REGISTER

### Description

*The Worldwide Lecture Seminar Series Presents*

**Pablo SoberĂ³n -**Northeastern University

**Friday, March 16, 2017**

Coffee, tea, cookies: 3:30pm

Talk: 4-5pm

**Worldwide Center of Mathematics -- Cambridge, MA, USA**

Abstract: During this talk we will discuss some robust variations of Tverberg’s theorem. The aim is to seek partitions of a finite set of points in R^d such that the convex hulls of the parts intersect, even if our set of points is going to be modified later on. Surprisingly, random partitions give sharp results. These are variations of Tverberg’s theorem which behave like weak epsilon-nets for convex sets.

## Monday, March 5, 2018

### Problem of the Week 3-6-18: Diophantine Equation/Prime Powers [Number Theory]

Be sure to let us know how you solved it in the comments below or on social media!

## Wednesday, February 28, 2018

### Advanced Knowledge Problem of the Week 3-1-18: An Improper Integral [Complex Analysis]

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## Tuesday, February 27, 2018

### Problem of the Week 2-27-18: Minimizing a Number [Inequalities]

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## Thursday, February 22, 2018

### Advanced Knowledge Problem of the Week 2-22-18: Inner Automorphisms [Group Theory]

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## Wednesday, February 21, 2018

## Tuesday, February 20, 2018

### Problem of the Week 2-20-18: Set Painting [Set Theory]

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## Thursday, February 15, 2018

### Advanced Knowledge Problem of the Week 2-15-18: Modular Arithmetic and Factorials [Number Theory]

Be sure to let us know how you solved it in the comments below or on social media!

## Wednesday, February 14, 2018

### Valentine's Day Theorem

Here is a neat little theorem referred to as the "Happy ending problem" by Paul ErdÅ‘s, due to it resulting in the marriage of two mathematicians. Happy Valentines Day!

## Tuesday, February 13, 2018

### Problem of the Week 2-13-18: Polynomial Root Averages [Polynomials]

Be sure to let us know how you solved it in the comments below or on social media!

## Friday, February 9, 2018

## Thursday, February 8, 2018

### Advanced Knowledge Problem of the Week 2-8-18: Nilpotent Elements [Abstract Algebra]

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## Tuesday, February 6, 2018

### Problem of the Week 2-6-18: Powers of Five [Number Theory]

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## Tuesday, January 30, 2018

### Problem of the Week 1-30-18: Recursion [Recursions, Polynomials]

Be sure to let us know how you solved it in the comments below or on social media!

Solution below.

## Thursday, January 25, 2018

### Math Organizations from JMM 2018

JMM 2018 was a fun math filled event and a great way to start the year. After meeting so many new people and seeing so many different math related organization, we thought we'd share some of our favorites. Here is a list of some of cool math organizations we learned about.

**AWM - Association for Women in Mathematics**

AWM works to help encourage interest in mathematics among women, as well as advocates for equality among genders in the mathematics. Formed in 1971, the society has held lectures series honoring notable female mathematicians and have given out medals such as the Alice T. Schafer for undergraduate women who have shown themselves to be exceptional mathematicians. They have notable members too, such as their current president Ami Radunskaya, who is a professor of mathematics at Pomona College.

**CoCalc - Collaborative Calculation in the Cloud**

CoCalc is part of the Sage Project, an expansive tool created by the mathematics professor William Stein. CoCalc is a powerful environment made to carry out mathematical calculations, and can also be used to help organize courses. Over 200 courses have used CoCalc; it has proven itself to be invaluable to classroom learning.

**Project Gutenburg - Free eBooks**

Project Gutenburg makes easily accessible old eBooks from notable authors, many of which have expired copyrights. On Project Gutenburg you can find works by Max Planck, Albert Einstein, Felix Klein, and many more. Project Gutenburg has books from a wide range of topics, which they digitize and proofread with the help of many volunteers.

**Edfinity - Affordable Resource for Problems**

It is well known that solving problems is key to progressing in mathematics, and Edfinity is working to make textbook problems more accessible to students. Edfinity provides problems and solutions from textbooks or other sources for students to solve to help further their education, and helps educators by making grading more automated. It is a convenient place for students to hone their problem solving abilities.

## Tuesday, January 23, 2018

### Problem of the Week 1-23-18: Combinatorial Sum [Algebra,Combinatorics]

Be sure to let us know how you solved it in the comments below or on social media!

Solution below.

## Monday, January 15, 2018

### Problem of the Week 1-16-18: Trigonometric Identity [Trigonometry]

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Solution below.

## Tuesday, January 2, 2018

### Problem of the Week 1-2-18: Unit Square [Geometry]

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