Wild about Math blogs 5/27/11

June 3rd, 2011 | by Sol |

Welcome to wild about Math blogs!

This is the last edition. If you want to put on your own personal Math blog carnival, I recommend you follow the large list of blogs at Mathblogging.org and let us all know about the items you like. I trøde, I had a rather large list of Math blogs in my RSS reader; their list is much larger. You can subscribe to parts or all of their list via RSS and you can even follow the Twitter feeds of a bunch of Math bloggers.

I discovered some really wonderful BBC Math radio shows. See here.

Math teachers play Carnival # 38 is up on mathematics and multimedia.

I have spend time on the website, strong Math Pickle enjoys the simple yet deep and difficult to solve mathematical puzzles and games there since "inspired people" are particularly noteworthy. There are some familiar faces on the page, Martin Gardner, We Hart and James Tanton to name a few. And there are a lot of people I don't know much about whom I have read on. Here is an inspired person from the list:

Leo Moser seems to have been the first person who are in favour of unresolved problems used in K-12 education. He asked many hard problems with child-like eagerness: "what is the area in at least the House that a device worm can live comfortably?" importance which shape can cover a worm regardless of how he curls up?

And also from the site Math Pickle is a video of a fun division games with some deep things happening under the surface.

MAA NumberADay has an interesting bit in number theory:

The product of four primes in a prime quadruplet (with the exception of 5, 7, 11, 13) always ends in 189. Example: 101 x 103 x 107 x 109 = 121, 330, 189.

I was curious about why this should be and I got this tip from Wikipedia:

All primary quadruplets except {5, 7, 11, 13} is of the form {30n + 11, 30n + 13, 30n + 17, 30n + 19} for some integer n. (this structure is necessary to ensure that none of the four prime numbers are divisible by 2, 3 or 5).

You can see why the product should end in 189 (apart from the first set)?

Sue on Math Math writes has a challenging Math problem from "Rediscovering mathematics, by Shai Simonson."

Finally, here is a funny number line cartoon from xkcd.

Hat tip to Ars Mathematica.

If you enjoyed this post, you must subscribe to my RSS feed!

Wild about Math blogs 5/27/11

June 3rd, 2011 | by Sol |

Welcome to wild about Math blogs!

This is the last edition. If you want to put on your own personal Math blog carnival, I recommend you follow the large list of blogs at Mathblogging.org and let us all know about the items you like. I trøde, I had a rather large list of Math blogs in my RSS reader; their list is much larger. You can subscribe to parts or all of their list via RSS and you can even follow the Twitter feeds of a bunch of Math bloggers.

I discovered some really wonderful BBC Math radio shows. See here.

Math teachers play Carnival # 38 is up on mathematics and multimedia.

I have spend time on the website, strong Math Pickle enjoys the simple yet deep and difficult to solve mathematical puzzles and games there since "inspired people" are particularly noteworthy. There are some familiar faces on the page, Martin Gardner, We Hart and James Tanton to name a few. And there are a lot of people I don't know much about whom I have read on. Here is an inspired person from the list:

Leo Moser seems to have been the first person who are in favour of unresolved problems used in K-12 education. He asked many hard problems with child-like eagerness: "what is the area in at least the House that a device worm can live comfortably?" importance which shape can cover a worm regardless of how he curls up?

And also from the site Math Pickle is a video of a fun division games with some deep things happening under the surface.

MAA NumberADay has an interesting bit in number theory:

The product of four primes in a prime quadruplet (with the exception of 5, 7, 11, 13) always ends in 189. Example: 101 x 103 x 107 x 109 = 121, 330, 189.

I was curious about why this should be and I got this tip from Wikipedia:

All primary quadruplets except {5, 7, 11, 13} is of the form {30n + 11, 30n + 13, 30n + 17, 30n + 19} for some integer n. (this structure is necessary to ensure that none of the four prime numbers are divisible by 2, 3 or 5).

You can see why the product should end in 189 (apart from the first set)?

Sue on Math Math writes has a challenging Math problem from "Rediscovering mathematics, by Shai Simonson."

Finally, here is a funny number line cartoon from xkcd.

Hat tip to Ars Mathematica.

If you enjoyed this post, you must subscribe to my RSS feed!

Wild about Math blogs 5/13/11

20 May 2011 | by Sol |

Welcome to post-mother's day Edition of wild about Math Blogs!

Carnival of mathematics # 77 has been posted on Jost a Mon.

Scientific American just re-released a wonderful article originally published in 1961: The mathematician as an Explorer. Hat tip to Shecky.

Murray at squareCircleZ has a very thought provoking article: is there room for invention in mathematics?

Each time a trainer early in a child something he could have discovered for themselves, that children be kept from inventing it and therefore from understanding it completely.

Statistics lovers can enjoy this little gem from xkcd:

James Tanton has a lot of new videos on formulas for volume and area for different shapes. Here is one:

Wolfram has for those of you in Mathematica and Twitter, now a new Mathematica tip every day on Twitter.

I will leave you with this funny quotes:

The secret is to start from scratch and keep on scratching. – Dennis Green

Hat tip to thnik again!

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Wild about Math blogs 5/20/11

27 May 2011 | by Sol |

Summer is coming to Santa Fe. Welcome to another edition of wild about Math Blogs!

Check out math and multimedia Carnival # 11 by love of learning Blog.

My player with Mathematica Blog well. For a new blog in a niche space, has almost 100 subscribers and over 100 article views per day in only three weeks, very cool! If you get up to speed on Mathematica or even if you are an expert in Mathematica I think you would like to blog.

I really this essay on without geometry, life is Pointless: teaching problem-solving, part 1: start with a good Problem. Here is the first of five characteristics:

The problem is available. It minimizes vocabulary and notation (and vocabulary and notation that exists should simplify, not complicate). It should only be as precise as necessary. The problem should have multiple access points, and include ways to collect data of a kind. It should have multiple methods that promote different learning styles and celebrate the different ways to be smart. It can have multiple valid solutions.

Brent Yorgey, one of my very favorite Math bloggers, has a nice little proof by induction of a neat property of numbers in the Fibonacci sequence. This is a good example of proof by mathematical induction for those new to the technique.

Wolfram Blog has a fascinating history: former Microsoft CTO uses Mathematica to explore Science modernist kitchen.

Ever wondered how to grill the perfect steak? Or how well the dunking food in an ice bath will stop cooking process? Nathan Myhrvold used Mathematica to answer these questions and many others.

Myhrvold, the first chief technology officer at Microsoft, has had a lifelong interest in cooking and have a background in science and technology. When he began to use new techniques such as sous know where the food is cooked slowly in vacuum-sealed bags of water at low temperature, he discovered that many chefs do not know much about the science behind cooking. He decided to change, with a massive Cookbook, which was released in March. In 2,438 pages covers modernist kitchen a wide range of techniques for cooking and their scientific backgrounds, including heat transfer and growth of pathogens. (It has recipes, too.)

Here is a fun video from the cookbook author: Exploring the Science of cooking. Mathematicas role in modernist kitchen.

Alasdairs speculation has a nice use of symbolic Math system (in this case Sage) to demonstrate that each year on a Friday the 13th. (Yes, we have just had one last week.)

Dan on dy/dan has an interesting article: The three acts of a mathematical Story.

Mike Croucher has a short article on Walking randomly: iPad 2 vs super computers.

Some time ago I wrote an article on comparison of mobile phones with antique supercomputers and today I learned that Jack Dongarra's Linpack benchmark run on iPad 2 and discovered that it has enough processing power to rival Cray 2; the most powerful supercomputer in the world back in 1985. Jack is iPad 2 so strongly that it would have remained in the top 500 list of world's most powerful supercomputers until 1994. It is a lot of power!

Have a good week.

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Wild about Math blogs 5/6/11

15th May 2011 | by Sol |

Hello, everyone! Here are this week's blog Roundup.

My new blog, play with Mathematica, it is good. In only a week has received 45 blog subscribers and 1000 page views. Plus, I got off to a good number of comments and participation from Mathematica wizards. There are three interactive notebooks on site. My goal is to have two new laptops each week. Come check it out.

Oxford University Press sent me a review copy of the revised and updated version of their book, The number sense of Stanislas Dehaene.

Our understanding of how the human brain performs mathematical calculations is far from complete, but in recent years there have been many exciting breakthrough of scientists throughout the world. In this sense, Stanislas Dehaene number now, offers a fascinating look at this recent research into an enlightening exploration of mathematical mind. Dehaene begins with awareness-raising discovery, animals – including rats, pigeons, raccoons and chimpanzees – can perform simple mathematical calculations, and that human infants also has a rudimentary sense of number. Dehaene suggests that this vestigial number sense is as basic as the brain understands world as our perception of colors or objects in space, and like those other abilities, our number sense is wired in the brain.

I have not had a chance to read it, but I see that the old version has a number of reviews on Amazon, and nearly every single is four or five stars. (The updated version is also new've many reviews).

Sue on Math Mama writes introduces www.pmathpickle.com a site I am enthusiastic to learn about. What I especially on the Web site is that it contains unlimited math problems that children can relate to and professional mathematics can try to crack. I need to use some of the activities on my Math gatherings, where I make it a point only examine ideas, children and adults together in the same room can enjoy. Read Sue article link to the archive in an interview with the author of the site.

Gary Davis on Republic of mathematics has a nice exploration in the allocation of powers of 2.0 's There are some nice-looking Mathematica graphs in the article.

Dan at Math4love writes about an amazing small subtraction games, small children can play and enjoy and that adults are able to also.

Here is a phenomenal lesson, available to every child who understand to subtract, and convincing for all, up to and including the professional mathematicians. Get a kid engaged in it, and they will make hundreds of subtraction problems without complaint, because it helps them solve an honest mathematical mystery.

Patrick on Math jokes 4 Mathy people share some of his favorite Math counts problems. Some of them are quite challenging, and they are for middle school students.

Journal of Marketing Research has a very interesting article about the influence of numbers in names of products placed on the market.

A series of experiments, documents numbers influence on taste of marks. For example, contains an imaginary brand name for anti-dandruff shampoo (zinc) are more wanted when it contains a common product number (e.g. zinc 24) than when with a prime number (e.g. zinc 31). Research also shows that the presence of the operands is responsible for the sum or product further reinforce the taste of a trade mark. For example, not only is a Volvo S12 more desire than a Volvo S29, but taste is further strengthened when an ad for a Volvo S12 contains a number plate with the numbers 2 and 6. Operands 2 and 6 make 12 more familiar, since they encourage during deliberate generation of number 12.

Hat tip to Pat.

Finally, to your video entertainment is here a great video of all kinds of interesting mathematical objects, some of which seem easy to do.

Hat tip to Xah Lee.

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