Google is digitizing 10 million photos from the the LIFE Magazine archives. Search millions of photographs from the LIFE photo archive, stretching from the 1750s to today. Most were never published and are now available for the first time through the joint work of LIFE and Google. Here are a couple mathematical ones. Caption: Cadets…
A correlation: 19th century cotton production and Obama votes
The Strange Maps blog has the following interesting map mash-up. This is an overlay of two maps. One is the 2008 presidential election results and the other is cotton production in 1860 (each dot represents 2000 bales). Strange Maps writes: The link between these two maps is not causal, but correlational, and the correlation is…
Four shuffles suffice
It takes a while to shuffle a deck of cards seven times, but it is well known that that is how many riffle shuffles it takes to fully randomize a deck of 52 standard playing cards. This was shown in 1992 by Bayer and Diaconis. As it turns out, however, for some games fewer than…
Judges, sonar, and innumeracy
Good Math, Bad Math has an interesting blog post about the recent Supreme Court case over the Navy’s use of sonar near marine wildlife. In the blog (and in the readers’ comments that follow), they talk about Chief Justice John Roberts use (misuse) of mathematics in his written decision.
The sum of kth powers
Everyone loves the “baby Gauss story” in which Gauss amazes his teacher by quickly summing the first 100 positive integers in a flash of brilliance—he adds the first to the 100th, the second to the 99th, and so on to get the sum of fifty 101s to obtain 5050. (Brian Hayes has a great article…
Google beats the CDC at their own game
Check this out! Google has been using search results to measure the severity of flu outbreaks around the United States. Google describes the phenomonon as follows. We have found a close relationship between how many people search for flu-related topics and how many people actually have flu symptoms… We compared our query counts with data…
Google scholar trick makes it more useful
Google Scholar is a resource for using Google to search for scholarly publications. I have not used the site much because, in my experience, it has been more of a frustration than an aid in research. When I used Google Scholar in the past I quickly found a link to the paper, but when I…
Red and blue election maps
I thought I’d made my last election-related post for a few years, but here’s one more. This is the red and blue 2008 election map we have gotten used to seeing for the past week. Mark Newman, a pysicist at the University of Michigan made a collection interesting election maps using software called Cart. Cart…
How did the pollsters do?
A few weeks ago I wrote about Fivethirtyeight.com, the website run by Nate Silver which made political predictions based on aggregating existing polls. You may want to check out a blog post by Carl Bialik, The Numbers Guy at the Wall Street Journal, in which he looks the accuracy of Nate Silver’s and other pollsters’ predictions. Here’s…
Google Books replaces the index
Indexes can be great tools for finding specific information in books. However, as we all know, they are often maddeningly incomplete. I was constantly frustrated when I was in graduate school studying for my analysis prelim exam. Royden’s Real Analysis (our text) had a terrible index. I ended up hand writing dozens of entries into…
David Richeson: Division by Zero 