## New math book makes its debut on Fibonacci Day

Today is 11/23, which some call Fibonacci Day. I received an email a few days ago from a Mr. Tony Gonzalez who has translated a very popular Japanese math book into English. I did receive a PDF review copy and liked what I saw but will wait to receive a printed copy before reading and reviewing. Here's Tony's email and press release. Tony, I wish you much success.

Hi, Sol.

My name is Tony Gonzalez. I'm a former math teacher (which is how I came to know your blog), but I'm now working mainly as a translator and publisher. I'm writing to let you know about a book that I translated and my company will be publishing next week, "Math Girls". We will be releasing the book on 11/23, "Fibonacci Day", perhaps making it a good topic for a blog post on that day?

I'm taking the liberty of sending you a press release announcing the publication (below). That should give you the rough details, but if you have any questions do please feel free to contact me by email, or you can get more information about the book at our website, bentobooks.com.

Thank you!

―Tony

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Press release

--- For immediate release ---

## More fun with the number 11

In honor of 11/22/11 (22 = 11+11), here is a nice complement to my 11/11/11 post.

## Happy 11/11/11 Day!

With help from a number of you I produced a screencast and blog article of fun math stuff for 11/11/11.

Read my blog article at the Wolfram Blog.

## Another clever exploration by James Tanton

I really enjoy James Tanton's Math explorations because they tend to be easy to describe and rich in exploration value. Here's such an exploration:

The problem statement is very simple. Is there a way in which we can say that there are more triangular numbers than square numbers? If so, how do we compare the sizes of the two sets? Can we compute the ratio of triangular to square numbers where both T(n) and S(n) are less than an arbitrary constant? Can we generalize what we find for other polygonal numbers?

This is a great exploration!