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From Computational Complexity

Reflections on Ronald Graham by Steve Butler

Ronald Graham passed away on July 6 at the age of 84. We present reflections on Ronald Graham by Steve Butler. Getting to work with Ron Graham Ron...

From Computational Complexity

A table for Matrix Mortality- what I wanted for Hilbert's 10th problem

In this post I speculated on why I could not find anywhere a table of which cases of Hilbert's 10th problem were solvable, unsolvable, and unknown. (I then made...

From Computational Complexity

Can you name a famous living Chemist? Can anyone?

I was re-watching the  Greatest-of-all-time Jeopardy championship and the following happen (I paraphrase) ---------------------- Alex Trebek: The category isBreaking...

From Computational Complexity

Winner of Ramsey Meme Contest

My REU program had a Ramsey Meme Contest. The winner was Saadiq Shaik with this entry: I Don't Always... I challenge my readers to come up with other Ramsey...

From Computational Complexity

Presentations of Diffie-Helman leave out how to find g

When I first taught Diffie Helman I read the following 1) Alice and Bob agree on p a prime and g a generator 2) Alice picks a, sends g^a to Bob, Bob picks b, sends...

From Computational Complexity

The Committee for the Adv. of TCS- workshop coming up SOON!

(Posted by request from Jelani Nelson.) The Committee for the Advancement of Theoretical Computer Science (CATCS) is organizing a Visioning workshop.  The...

From Computational Complexity

How to handle grades during the Pandemic

In March many Colleges sent students home and the rest of the semester was online. This was quite disruptive for the students. Schools, quite reasonably, wanted...

From Computational Complexity

Oldest Living Baseball Players- can you estimate...

(The Baseball season is delayed or cancelled, so I post about baseball instead.) This post is going to ask a question that you could look up on the web. But what...

From Computational Complexity

Obit for Richard Dudley

Richard M. (Dick) Dudley died on Jan. 19, 2020 (NOT from Coronavirus).You can find obituaries for him  here, here, and here and an interview with him from 2019...

From Computational Complexity

Awesome Video from Women In Theory!

Below is an awesome video made by WIT (Women In Theory) on May 10, 2020 to celebrate the women in our field and in place of the Women in Theory Workshop that was...

From Computational Complexity

Why is there no (d,n) grid for Hilbert's Tenth Problem?

Hilbert's 10th problem, in modern language is: Find an algorithm that will, given a poly over Z in many variables, determine if it has a solution in Z. Thishere...

From Computational Complexity

A Guest Blog on the Pandemic's affect on disability students

I asked my Grad Ramsey Theory class to email me about whatever thoughts they have on the pandemic that they want to share with the world, with the intend of making...

From Computational Complexity

John Conway Dies of Coronvirus

John Conway passed away on April 11, 2020 of the Coronovirus. He is the first person I knew (for some definition of `know') who has died of it. I suspect this is...

From Computational Complexity

Length of Descriptions for DFA, NFA, CFG

We will be looking at the size of descriptions  For DFAs and NFAs this is the number of states. For CFG's we will assume they are in Chomsky Normal Form. Sohere...

From Computational Complexity

What do do while ``stuck'' at home/Other thoughts on the virus

Lance had a great post on what to do while you are stuck at home, which is of course relevant to whats happening now. Lance's post is here. I will add to it, and...

From Computational Complexity

Richard Guy passed away at the age of 103

Richard Guy passed away on March 9, 2020 at the age of 103. Before he died he was the worlds oldest living mathematician (see here for a list of centenarians who...

From Computational Complexity

Theorist Paul R Young passed away

In the early days of theoretical computer science, say 1960-1990 the main tools used were logic. This made sense since, early on: a) Some of the basic notionspassed...

From Computational Complexity

Logic examples for your Discrete Math class

(I injured my hand about a month ago so I have had a hard time typing. That is why I have not blogged for a while. I'm better now but still slow. This is a post...

From Computational Complexity

What would you do if you showed P=NP? I would reread Factor Man by Matt Ginsberg

Lance has often said (and also in this) that if P=NP that would be great for the world: much more efficient ways to build things, science could be done better,Factor...

From Computational Complexity

The Wikipedia Entry on NP-Intermediary Problems lists one of mine! I'm not bragging about it.

I recently needed to look at what NP problems were possibly intermediary (neither in P nor NP-complete). So I went to Wikipedia and found this. They had many problems...
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