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SATOSHI HADA


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AN ALTERNATIVE OF COMPLEXITY ZOO FOR IPAD

Posted on September 19, 2024 by satoshihada

More than 10 years ago, I developed and published an iOS viewer for Complexity
Zoo, but I found it difficult to maintain it due to the frequent version updates
of iOS. What the viewer does is to download the HTML content from Complexity
Zoo, analyze the hyperlinks, and transform it into a set of static HTML files.
Although it’s too late, I have just published the generated files on GitHub
(https://satoshihada.github.io/complexity-zoo/). I admit I should have done
earlier.



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Posted in Complexity Zoo, iPad, iPhone | Leave a comment


LINEAR ALGEBRA TEXTBOOKS

Posted on May 7, 2022 by satoshihada

Two years ago, I started to self-study quantum computing so that I can explain
Shor’s factoring algorithm to some extent, and I realized that I should relearn
linear algebra. Since then, I have been reading several popular textbooks, and
hare are my recommendations.

Quantum algorithms are often written in terms of abstract vectors (Dirac
notations) rather than matrices/column vectors, and so we need to learn an
abstract view of linear algebra. I would recommend that you read the textbooks
below in the following three steps: (1) Basic, (2) Intermediate, and (3)
Advanced.


(1) BASIC

These well-known textbooks have focus on matrices rather than linear
transformations. Matrices are visible objects, and so either will be a good
start to get used to matrix operations and concepts like eigenvalues/vectors and
diagonalization. However, I don’t think they are good enough for learning
quantum algorithms. In particular, it was difficult for me to understand the
relationship between linear transformations and matrices.

Linear Algebra and Its Applications by David Lay, Steven Lay, Judi McDonald

Introduction to Linear Algebra by Gilbert Strang


(2) INTERMEDIATE

This textbook has more focus on linear transformations than the above basic
books. As the authors note in the preface, it emphasizes the symbiotic
relationship between linear transformations and matrices. Actually, it is very
well-written (See Chapter 2). I believe that this book can serve as a bridge to
more advanced textbooks, which have more focus on abstract vector spaces and
linear transformations.

Linear Algebra by Stephen Friedberg, Arnold Insel, Lawrence Spence


(3) ADVANCED

These are textbooks on abstract vector spaces and linear transformations, and
you will be　ready for learning quantum algorithms.

Linear Algebra Done Right by Sheldon Axler

Linear Algebra by Kunze Hoffman

Finite-Dimensional Vector Spaces by Paul R. Halmos


Posted in Uncategorized | Tagged Linear algebra | Leave a comment


COMPLEXITY ZOO FOR IPAD 1.3.0

Posted on January 17, 2014 by satoshihada

Version 1.3.0 is available in the AppStore. Now, complexity garden and glossary
are added as offline contents.

In Version 1.2.6, a complexity ranking page was added. You can view it by
tapping the icon image on the Info dialog.

Since Version 1.2.9, you can change the font size.



Posted in Complexity Zoo, iPad, iPhone | Leave a comment


COMPLEXITY ZOO FOR IPAD 1.2.5

Posted on July 7, 2013 by satoshihada

My wife bought an iPhone 5 and so finally I was able to test and update it for
iPhone 5.

Posted in Complexity Zoo, iPad, iPhone | Leave a comment


COMPLEXITY ZOO FOR IPAD 1.2.4

Posted on December 22, 2012 by satoshihada

Another update for server location changes. It uses a configuration file to
identify the server URL and related parameters.

Posted in Complexity Zoo, iPad, iPhone | Leave a comment


COMPLEXITY ZOO FOR IPAD 1.2.3

Posted on December 9, 2012 by satoshihada

Due to the server location change, I needed to update the app code. I believe
that the problem was fixed in the new version 1.2.3.

Posted in Complexity Zoo, iPad, iPhone | Leave a comment


KINDLE LAUNCH IN JAPAN

Posted on February 25, 2012 by satoshihada

According to Nikkei, Amazon is going to launch Kindle here in Japan. In Japan,
we mean by Amazon Amazon.co.jp rather than Amazon.com. Actually, I do have two
Amazon accounts, one is for .com and the other is for .co.jp. The question is
which will provide the upcoming Kindle service in Japan. I guess it’s the
latter. The next question is whether I can use my Kindle DX (registered with my
.com account) to buy and read Kindle books from .co.jp. Anyway, I hope I can
consolidate the two accounts into a single one someday.

Posted in Kindle | Leave a comment


COMPLEXITY ZOO FOR IPAD 1.2

Posted on January 24, 2012 by satoshihada

Added a simple search function. You can search the entire zoo (Symbols, A, B,…,
Z) for a keyword.



 

 





Posted in Complexity Zoo, iPad, iPhone | Leave a comment


KINDLE DX VS IPAD

Posted on December 30, 2011 by satoshihada

I got Kindle DX and then iPad last year. Since I got my iPad, I had no
opportunity to use my Kindle DX. This is because iPad is good enough for reading
Kindle books. Last week I started to read “Steve Jobs (Kindle edition)” on my
iPad. It’s my holiday reading. Unfortunately, my 3-year-old always tries to
snatch it from me. Kindle DX can solve the problem because he does not care
about it. I will take this opportunity to look for an advantage of Kindle DX
over iPad.

Posted in Family, iPad, Kindle | Leave a comment


GOOGLE SCHOLAR CITATIONS

Posted on November 19, 2011 by satoshihada

Google Scholar Citations works great!

My profile is http://scholar.google.com/citations?user=z1RvaHsAAAAJ

Posted in Work | Leave a comment
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