Sign In

Communications of the ACM

Blogroll



From Computational Complexity

Super Asymmetry on The Big Bang Theory: How Realistic?

The TV show The Big Bang Theory portrays academia so I am naturally curious how realistic it is. I have posted about this before (see here) in the context of whether...

From Computational Complexity

George HW Bush passed away- some non-partisan math comments

George HW Bush passed away recently. When he was alive there were 5 living ex presidents. Now there are 4. What is the max and min number of ex presidents? This...

From Computational Complexity

If you think a theorem is true then spend half your time trying to prove its true, and half trying to prove its false.

There is a quote I recall but not who said it.  I have not been able to find it on the web. If you think a theorem is true then spend half of your time trying...

From Computational Complexity

Is Secret sharing REALLY REALLY REALLY used?

Since I am teaching Cryptography this semester I am teaching things people REALLY REALLY REALLY (RRR) use. For some topics this is RRR true, like RSA (that it is...

From Computational Complexity

And the winner is again, Harambe: A pre election poll of my class that was truly a referenum on the Prez

I had meant to post this before the election but I didn't quite time it right. Oh well. It has been said that this midterm election (more than others) was a referendum...

From Computational Complexity

Is Fuzzy Sets Common Knowledge? How about Napier as inventing (or something) logs?

Darling: Bill, help me with this crossword puzzle. 6 letter word that begins with N, clue is log man Bill: Napier Darling: Who was that? Bill: A famous lumberjack...

From Computational Complexity

If P=NP then we HAVE an alg for SAT.

I am writing up the result of my survey of peoples opinion of P vs NP (it will be in a SIGACT News, in Lane's Complexity Column, in 2019.) Some  people wrote: ...

From Computational Complexity

Please Don't call them Guidance Counselors

As I mentor many HS students I was recently in email contact with the HS contact for projects and I noticed that the sign off was Allie Downey Guidance Schoolhank...

From Computational Complexity

Practical consequences of RH ?

When it seemed like Riemann Hypothesis (RH) might be solved (see Lipton-Regan blog entry on RH  here and what it points to for more info) I had the following email...

From Computational Complexity

A New ACO Center (guest post by Vijay Vazirani)

Guest Post by Vijay Vazirani                                                           A New ACO Center! Last week, I helped launch an ACO Center (Algorithms,...

From Computational Complexity

John Sidles, Mike Roman, Matt Howell, please email me/hard to get emails of people

John Sidles, Mike Roman, Matt Howell : please email me. at [email protected] (my usual email) I need to ask you about some comments you left on the blog a while...

From Computational Complexity

Google added years to my life

If you google gasarch you used to  get the following:   here Please go there and notice how old they say I am. Okay, you are back. You may have noticed that...

From Computational Complexity

What is a Physicist? A Mathematician? A Computer Scientist?

 Scott Aaronson recently won the Tomassoni-Chisesi Prize in Physics (yeah Scott!). In his post (here) about it he makes a passing comment: I'm of course not...

From Computational Complexity

The Tenure system is broken but not in the way that you think (Anon Guest Post)

This is an ANONYMOUSE Guest Post. Even I don't know who it is! They emailed me asking if they could post on this topic, I said I would need to see the post, and...

From Computational Complexity

The Rule of Threes/Astology

On Aug 16, 2018 Aretha Franklin died. A famous singer. On Aug 18 2018 Kofi Anan died. A famous politician. On Aug 25, 2018 John McCain died. A famous politician...

From Computational Complexity

Is Trivium (the Stream Cipher) used?

This Fall I am teaching the senior course in Crypto at UMCP. Its a nice change of pace for me since REAL people REALLY use this stuff! Contrast to last Spring when...

From Computational Complexity

Fractional Problems: 2.1-colorable, 2.8-SAT

Some graphs are 2-colorable, some graphs are 3-colorable, some graphs are...Does it make sense to say that a graph is 2.1-colorable? It does!(Source_ Factionalhere...

From Computational Complexity

How valuable is a Fields Medal?

(Johan Hastad won the Knuth Prize! The below post was written before I knew that but has a mild connection to it. See here for more info on the Hastad winning it...

From Computational Complexity

The Future of TCS Workshop, celebrating V Vazirani 60th, now online

On June 29, 2018, a workshop was held, in conjunction with STOC 2018, to celebrate the accomplishments of Vijay Vazirani on the  occasion of his 60th birthday...

From Computational Complexity

Three trick questions in Formal Lang Theory

There are three questions I ask in my Formal Lang Theory class that even the very best students get wrong. Two I knew were trick quesions, the other I was surprised...
Sign In for Full Access
» Forgot Password? » Create an ACM Web Account