### Search Skulls in the Stars:

- The author of Skulls in the Stars is a professor of physics, specializing in optical science, at UNC Charlotte. The blog covers topics in physics and optics, the history of science, classic pulp fantasy and horror fiction, and the surprising intersections between these areas.
### Archives

### Twitter Updates

- I mean, I did a postdoc in Amsterdam for two years and, uh, I did just fine? And came back thinking the US system… twitter.com/i/web/status/1… 24 minutes ago
- I spend most of my days feeling like a complete failure as a human being. 29 minutes ago
- I hope the GOP doesn’t think they’re gonna get a bunch of grateful votes from forced birth babies in the future bec… twitter.com/i/web/status/1… 4 hours ago
- RT @HumanityCritic: How she routinely goes out of her way to be a piece of shit would be impressive if it didn't affect people's lives. 4 hours ago

### Categories

### Blogroll

- Anthropology in Practice
- Carin Bondar.com
- cgranade::streams
- Clastic detritus
- Cocktail Party Physics
- Cosmic Variance
- Culturing Science
- Deep Sea News
- DIEHL Research Grant Services
- En Tequila Es Verdad
- From the Hands of Quacks
- Gambler's House
- Highly Allochthonous
- Laelaps
- Magma Cum Laude
- Musings on the Art of Cable
- Neurotic Physiology
- Physics Buzz
- PLoS Blogs
- Scienceblogging.org
- Scientopia
- Swans on Tea
- Swords & Dorkery
- The Dispersal of Darwin
- The Gam
- The Greenbelt
- The Inverse Square Blog
- The Language of Bad Physics
- The Primate Diaries
- The Renaissance Mathematicus
- The Thoughtful Animal
- Uncertain Principles
- White Coat Underground

### Meta

# Category Archives: Mathematics

## A vintage math puzzle!

Over a decade ago, at the beginning of this blog, I wrote a blog post about some classic math puzzles where a nonsensical result is arrived at by seemingly plausible mathematics; in the post, I challenged folks to figure out … Continue reading

Posted in Mathematics
1 Comment

## A curious mathematical identity

Update: There is more subtlety to the infinite case, which I’ve now addressed in the post! Update 2: Learning so much messing with this! Added a bit more discussion near the end. So on twitter yesterday, the following mathematical identity … Continue reading

Posted in ... the Hell?, Mathematics
Leave a comment

## Optics and infinity at American Scientist!

I’ve been kind of quiet here lately, partly due to my job and partly due to writing blog posts and essays for other venues. Happily, one of these blog posts is now available to read over at American Scientist, on … Continue reading

Posted in Mathematics, Optics, Personal
1 Comment

## Beautiful equations of math and physics: my picks

A few days ago, the BBC introduced a series of posts in which they asked mathematicians and physicists to share their favorite equations. It’s a fun list, and the original post can be found here. One of the equations selected … Continue reading

Posted in Mathematics, Physics
12 Comments

## Infinite hotels in swirling beams of light

I’ve noticed there seems to be a general unspoken rule about the relationship between mathematics and science: any mathematics, no matter how abstract or seemingly disconnected from reality, eventually finds use or representation in the natural world. For example, most … Continue reading

Posted in Mathematics, Optics
12 Comments

## “Count Like an Egyptian” over at The Finch & Pea!

For those who just can’t get enough of my writing (anyone?), I wrote a guest post over at The Finch & Pea about the book Count Like an Egyptian by David Reimer. Check it out! Not only do I discuss … Continue reading

Posted in Mathematics, Personal
Leave a comment

## Curves… in… spaaaace! (1890)

One of the tragedies of STEM education is the seemingly eternal perception by the general public that mathematics is boring and repetitive. Most people, of course, end their math education with algebra at most, though some work their way through … Continue reading

Posted in Mathematics
6 Comments

## Infinite series: not quite as weird as some would say

Updated with a third footnote clarifying my use of the term “diverge,” thanks to suggestion by Evelyn Lamb, who has also written an excellent discussion of the problem with the video. At the end of this post I list all the … Continue reading

Posted in ... the Hell?, Mathematics
32 Comments

## Infinity is weird: what does it all mean?

The final installment in a series of posts on the size of the infinite, as described in mathematical set theory. The first post can be read here, the second here, and the third here. We have taken a long, strange journey into … Continue reading

Posted in Mathematics
5 Comments