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Articles by Peter Norvig

Functional Lifestyles Training 1 Apr 2018, 12:00 am

Some heavy lambda lifting could get you in better functional shape.

xkcd 1970: Name Dominoes 21 Mar 2018, 12:00 am

Lay out dominoes legally; the dominoes have people names, not numbers.

Advent of Code 2016 24 Dec 2016, 12:00 am

Solutions to the puzzle site.

Advent of Code 2017 24 Dec 2016, 12:00 am

Solutions to the puzzle site.

Even Longer Longest Palindrome 6 Oct 2016, 12:00 am

Updating the palindrome program to search letter-by-letter; thus finding a longer palindrome.

Translating English Sentences into Propositional Logic Statements 1 Oct 2016, 12:00 am

Automatically converting informal English sentences into formal Propositional Logic.

WWW: Will Warriors Win? 27 Apr 2016, 12:00 am

Will the Warriors win the NBA title?

The Strength in Numbers Theorem 27 Apr 2016, 12:00 am

Update to my probability notebook, adding the Central Limit Theorem, also known as the Strength in Numbers Theorem.

On the (Small) Number of Atoms in the Universe 27 Apr 2016, 12:00 am

On the difference between counting things and counting combinations of things.

Go, Dog. Gauguin! The P. D. Eastman Story 1 Apr 2016, 12:00 am

The untold story of the children's book author/illustrator.

Countdown to 2016 6 Jan 2016, 12:00 am

Solving the equation 10 _ 9 _ 8 _ 7 _ 6 _ 5 _ 4 _ 3 _ 2 _ 1 = 2016. From an Alex Bellos puzzle.

Refactoring a Crossword Game Program 29 Dec 2015, 12:00 am

Refactoring the Scrabble / Wrds with Friends game from Udacity CS 212.

Beal's Conjecture Revisited 20 Oct 2015, 12:00 am

Updating the work I did in 2000 to search for counterexamples to Beal's Conjecture. Lists some of the things that people do wrong in trying to settle the conjecture.

Probability, Paradox, and the Reasonable Person Principle 3 Oct 2015, 12:00 am

An IPython notebook tutorial on Probability Paradoxes

Let's Code About Bike Locks 15 Jun 2015, 12:00 am

How many words can be made from a letter-based combination lock?

When Cheryl Met Eve: A Birthday Story 13 May 2015, 12:00 am

An extended exploration beyond the popular "Cheryl's Birthday" logic puzzle.

Cheryl's Birthday (How to Solve It with Code) 24 Apr 2015, 12:00 am

A solution to the popular "Cheryl's Birthday" logic puzzle.

LI2: Lego Institute for Lego Investigation 10 Sep 2014, 12:00 am

Web site for a new research institute.

Sol Golomb's Rectangle Puzzle 7 May 2014, 12:00 am

How many ways can you pack rectangles into a square? And other combinatorial problems ...

xkcd 1313: Regex Golf 20 Feb 2014, 12:00 am

Code to implement a meta-regex-golf program based on xkcd comic #1313. The code is "a program that plays regex golf with arbitrary lists..."

xkcd 1313: Regex Golf (Part 2: Infinite Problems) 20 Feb 2014, 12:00 am

Newly updated and improved version of my code to implement a meta-regex-golf program based on xkcd comic #1313. The code is "a program that plays regex golf with arbitrary lists..."

Photos of Costa Rica Wildlife 27 Jan 2013, 12:00 am

Photos from a trip to Costa Rica with wildlife photographer Suzi Eszterhas.

Letter Frequencies for Scrabble 27 Jan 2013, 12:00 am

An analysis of frequency counts for letters in English, with applications to the game of Scrabble. Also presents a distillation of the Google Books Ngram data, broken out by time periods.

English Letter Frequency Counts: Mayzner Revisited or ETAOIN SRHLDCU 4 Jan 2013, 12:00 am

An analysis of frequency counts for letters and letter sequences (n-grams), with counts broken out by length of word and poition in word, as well as by length of ngram. A re-implementation of the work done by Mark Mayzner in the 1960s -- but this time with 30 million times more data.

FAQ for the 2012 US Presidential Election (#FF00FF) 2 Nov 2012, 12:00 am

Added questions about early voting and state/federal to my frequently-asked-question list for the 2012 United States Presidential Election; all questions are answered with facts that are as objective as I can make them, except for the last question, in which I endorse President Obama.

FAQ for the 2012 US Presidential Election (#FF00FF) 27 Oct 2012, 12:00 am

A frequently-asked-question list for the 2012 United States Presidential Election; all questions are answered with facts that are as objective as I can make them, except for the last question, in which I endorse President Obama.

Google's Hybrid Approach to Research 24 Jun 2012, 12:00 am

An article printed in the Communications of the ACM describing Google's research, both within Google Research and within Engineering as a whole. Alfred Spector, Peter Norvig and Slav Petrov.

Peter Norvig: The 100,000-student classroom 24 Jun 2012, 12:00 am

My talk at the TED conference. Six minute video.

Intro to Statistics 24 Jun 2012, 12:00 am

This is not actually mine; it is a class by my co-teacher, Sebastian Thrun, on Intro to Statistics. I mention it because I think statistics is one of the most under-appreciated topics; everyone should learn statistics!

Prescient but Not Perfect: A Look Back at a 1966 Scientific American Article on Systems Analysis 24 Aug 2011, 12:00 am

My thoughts on a 1966 Scientific American article that was my introduction to programming. And if you ever need a CPL compiler, this is a good place to start.

Introduction to Artificial Intelligence 24 Aug 2011, 12:00 am

Sebastian Thrun and I are teaching an AI class online; 126,000 people have signed up so far.

Strachey's Checkers program from 1966 24 Aug 2011, 12:00 am

The source code to accompany my essay on Strachey's Scientific American article.

On Chomsky and the Two Cultures of Statistical Learning 27 May 2011, 12:00 am

At the MIT 150 symposium, Chomsky said that the notion of success used by statistical language models (namely, that they successfully predict the world and allow programs to accomplish tasks) was "very novel ... I don't know of anything like it in the history of science." This essay argues that it is not novel at all, but perfectly commonplace.

Dance Photography 16 May 2011, 12:00 am

An overview of photographic techniques for taking pictures of indoor dance performances. (Also useful for any indoor action photography.)

(An ((Even Better) Lisp) Interpreter (in Python)) 5 Oct 2010, 12:00 am

A new version of Lispy (Lisp interpreter in Python). I released an earlier version on Sept. 30th, but this version is improved.

(How to Write a (Lisp) Interpreter (in Python)) 30 Sep 2010, 12:00 am

A Lisp interpreter in 90 lines of Python

The Odds of Finding a Set in The Card Game SET 28 Apr 2010, 12:00 am

Correcting an error in the instruction booklet for the card game SET

Lieberman, Egg, Sausage and Lieberman 22 Feb 2009, 12:00 am

A reply to Nate Silver's jungle primary post

All we want are the facts, ma'am 22 Feb 2009, 12:00 am

On the lost art of fact-checking, and Chris Anderson's Wired Magazine article on The End of Theory

An Exercise in Species Barcoding 11 Feb 2009, 12:00 am

Just in time for Darwin's birthday: an exercise in analyzing the differences in genomes to detect the boundaries between species

Election final predictions -- Part of my FAQ for the 2008 Election 4 Nov 2008, 12:00 am

Final prediction for electoral and popular votes: 353-185; 54-45%

What are imaginary reasons McCain might win? FAQ for the 2008 Election 30 Oct 2008, 12:00 am

Here are some reasons based onhope, not reason.

What does McCain have to do to win? FAQ for the 2008 Election 30 Oct 2008, 12:00 am

Does McCain have a path to win? A state-by-state analysis.

How accurate are polls? FAQ for the 2008 Presidential Election 21 Oct 2008, 12:00 am

New question for my FAQ answers "How accurate are polls?"

Why are there so many negative attacks on both sides? FAQ for the 2008 US Presidential Election 20 Oct 2008, 12:00 am

New question: "Why are there so many negative attacks on both sides?" for FF00FF, my FAQ for the 2008 US Presidential Election.

Election 2008 Dashboard 15 Oct 2008, 12:00 am

A collection of charts, poll results, and links, for the obsessive election junkie.

What about the economy? FAQ for the 2008 US Presidential Election 12 Oct 2008, 12:00 am

New question: "What about the economy" for FF00FF, my FAQ for the 2008 US Presidential Election.

Does race matter? FAQ for the 2008 US Presidential Election 9 Oct 2008, 12:00 am

New question: "Does race matter?" for FF00FF, my FAQ for the 2008 US Presidential Election.

Is the media biased? FAQ for the 2008 US Presidential Election 7 Oct 2008, 12:00 am

New question: "Is the media biased?" for my FAQ for the 2008 US Presidential Election. Tells you where to get information and compares the candidates.

Is it rational to vote? FAQ for the 2008 US Presidential Election 3 Oct 2008, 12:00 am

New question: "Is it rational to vote?" for my FAQ for the 2008 US Presidential Election. Tells you where to get information and compares the candidates.

FAQ for the 2008 US Presidential Election 30 Sep 2008, 12:00 am

An FAQ for the 2008 US Presidential Election. Tells you where to get information and compares the candidates.

Beauty and the Geek Game Theory: Answering the Freakonomics Challenge 16 Aug 2008, 12:00 am

Answering Alon Nir's Freakonomics Challenge: What strategy to use on the TV show Beauty and the Geek

Galapagos Photography 2 Aug 2008, 12:00 am

Notes on what camera equipment to take to Galapagos, and links to my galleries.

Hiring a President II: Why I Endorse Obama 4 Feb 2008, 12:00 am

How to hire a president as if we were interviewing for CEO of a company: the 2008 edition.

Update to world's longest palindrome sentence 11 Nov 2007, 12:00 am

I update my palindrome page, and list a slightly longer one.

Warning Signs in Experimental Design and Interpretation 9 Jul 2007, 12:00 am

An update to my essay on experiment design; it now stresses warning signs rather than clear-cut mistakes and urges the reader to consider the factors that dilute the credibility of an experiment.

Evaluating Extraordinary Claims: Mind Over Matter? Or Mind Over Mind? 9 Jul 2007, 12:00 am

A companion to my essay on experiment design, this essay uses as an example the literature on the efficacy of intercessory prayer on medical conditions.