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From Computational Complexity

Judea Pearl wins Turing Award

(In this age of lightenting fast communication I suspect you all already know that Judea Pearl won the Turing Award. Even so, it is worth posting about.) Judea...

From Computational Complexity

How do legit fields of knowledge decide between competing fields? How does Astrology?

Euler was born April 15, 1707. Hence by the Western Astrology that we all ignore he is an Aries. However, I recently heard about another way (also worth ignoring)...

From Computational Complexity

When a+b is harder than b+a

Is 1+4 a harder calculation than 4+1? It may be if you are 2+3 years old. I asked my 7-2 year old great niece Noelle the following sequence of questions. I include...

From Computational Complexity

The Erdos- de Bruijn theorem

The mathematician Nicolaas Govert de Bruijn passed away on Feb 17, 2012. The number of things named after him is quite large. I will discuss the Erdos-de Bruijn...

From Computational Complexity

Presidents Day Poll- what does the youth of american think about....

(In honor of President's day which was two days ago.) On Presidents Day last year I had my classes fill out a form saying who they thought was the best, second...

From Computational Complexity

People solve math problems for the prize money! NOT!

Why do people or organizations offer Prize Money for mathematics? Paul Erdos: He offered money to solve problems that he found interesting. I assume he wanted...

From Computational Complexity

STOC 2012 accepts are posted

STOC 2012 paper accepts are posted here. Travel support for grad students (which I am involved with) is posted here. On a quick glance: I tried counting thehere...

From Computational Complexity

The 17x17 problem SOLVED! (also 18x18)

THE 17x17 PROBLEM HAS BEEN SOLVED!!!!! On Nov 30, 2009 I posted here the following challenge: If someone emails me a 4-coloring of 17x17 with no monochromatic...

From Computational Complexity

Dusting off my bookshelf I find a book on FORTRAN

The following quote is from the back of a book that I dusted off and took off of my shelf recently: FORTRAN is one of the oldest high-level languages and remains...

From Computational Complexity

A result of Specker in Recursive Combinatorics

Ernst Specker passed away in December. He has 91. He was not the oldest living mathematician. That title likely belongs to Sergey Nikolsky. A former student ofhere...

From Computational Complexity

Guest post on ITCS by Chazelle

(Requested announcement: Calling all Women PhD Students (and a few undergrads) We will be having our bi-annual Women in Theory (WIT) Workshop this year in Princeton...

From Computational Complexity

Teaching an Honors Section of Discrete Mathematics

A few years ago I was assigned to teach the HONORS section of Discrete Math (a course for sophomores who have had a year of programming and a year a calculus). They...

From Computational Complexity

How important are the Fib numbers in math? in Nature? In History of Math books?

The following quotes is from In the book Algebra in Ancient and Modern Times by V.S. Varadarajan. Fibonacci numbers thus grow very fast with N, indeed in geometric...

From Computational Complexity

The Conjunction Paradox

In Yesterday's post you were told about Susan: Susan is 31 years old, single, outspoken and very bright. She majored in philosophy. As a student she was deeply...

From Computational Complexity

Rank these possibilities by probability

Readers- I want you to answer this question and post your answers as comments. I will tell you WHY I am asking tommorow. Susan is 28 years old, single, outspoken...

From Computational Complexity

Is there a NICE gadget for showing PLANAR HC is NPC?

(I have already posted this question on CS Theory Stack Exchange.) If you know that 3-COL is NPC then you can prove that PLANAR 3-COL is NPC by a NICE gadget...

From Computational Complexity

Romney vs. Aaronson

How are Mitt Romney and Scott Aaronson similar? Different? Similarities: Both live in Massachusetts. Actually, Scott lives there but its not clear where Mitt...

From Computational Complexity

Solution to the reciprocals problem

In my last blog I asked you to look at this problem, try to solve it, and tell me if you think it is too hard for a HS competition. (I meant to post this on WED...

From Computational Complexity

Is this problem too hard for a HS Math Competition

The Univ of MD HS Math Competition has two parts. Part I is 25 multiple choice questions in 2 hours (4 points for a correct answer, -2 for an incorrect answer)....

From Computational Complexity

What is a Breakthrough?

The recent discussion on Matrix Mult inspires the general question of WHAT IS A BREAKTHROUGH? Last year I tried to get an intelligent discussion on this topic but...
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