Image via Wikipedia
I don't know what to make of this site.Monday, 31 August 2009
Sunday, 30 August 2009
Butterfly Station
Image via Wikipedia
There are a lot of artistic and beautiful physics visualizations at the Butterfly Station.The image shows a Spirograph, which I loved when I was a kid. You can simulate one at the Butterfly Station.
Saturday, 29 August 2009
Kaprekar's constant: 6174
I just discovered Kaprekar's constant, 6174, named after an Indian mathematician. As noted in the Wikipedia article on the constant, "This number is notable for the following property:
1. Take any four-digit number with at least two digits different. (Leading zeros are allowed.)
2. Arrange the digits in ascending and then in descending order to get two four-digit numbers, adding leading zeros if necessary.
3. Subtract the smaller number from the bigger number.
4. Go back to step 2.
The above operation, known as Kaprekar's operation, will always reach 6174 in at most 7 steps and it stops there. Once 6174 is reached, the process will keep yielding 7641 – 1467 = 6174."
Weird.
I am pleased to discover the Wikipedia has entries on many individual integers.
The image comes from Plus Magazine, a magazine of mathematics- click the image for a more detailed article on 6174.
Labels:
Arithmetic,
Integers,
Math,
Plus magazine,
Recreation,
Specific Numbers,
Subtraction
Wednesday, 26 August 2009
The Road to Wisdom
Ducks versus man
I hope that I am not the only one who finds this quote delightful:
"How fleeting are all human passions compared with the massive continuity of ducks."
— Dorothy Sayers, Gaudy Night
I know Dorothy Sayers as a mystery writer. I used to read a lot of her books when I was young. Her fictional character, Lord Peter Wimsey, has his own Wikipedia page.
"How fleeting are all human passions compared with the massive continuity of ducks."
— Dorothy Sayers, Gaudy Night
I know Dorothy Sayers as a mystery writer. I used to read a lot of her books when I was young. Her fictional character, Lord Peter Wimsey, has his own Wikipedia page.
Labels:
Arts,
Books,
Character,
Dorothy L Sayers,
Dorothy Sayers,
Fiction,
Lord Peter,
Writer
Monday, 24 August 2009
Friday, 14 August 2009
Thursday, 13 August 2009
Lego movie
Image via Wikipedia
Gizmodo reports: Variety reports that Warner Brothers is developing a Lego movie that will be "a family comedy that will mix live action and animation." An "action adventure set in a Lego world."
Labels:
Collecting,
Lego,
LegoMovie,
Recreation,
Toys,
Warner Bros
Wednesday, 12 August 2009
How to live happily.
"In order to live happily I must be in agreement with the world. And that is what ‘being happy’ means. I am then, so to speak, in agreement with that alien will on which I appear dependent. That is to say: 'I am doing the will of God.'"
Ludwig Wittgenstein
Notebooks
"In this sense God would simply be fate, or, what is the same thing: The world- which is independent of our will."
Ludwig Wittgenstein
Notebooks
This would be a good epigraph for the Book of Job.
Image: Drawing of the Book of Job by William Blake (Plate 14).
Tuesday, 11 August 2009
Monday, 10 August 2009
Algebraic surfaces
I like this list of mathematical formulas for describing shapes (or, in fancy terms, 'algebraic surfaces'). You can try these out with the 'Grapher' program that Apple ships with its system (or any other 3D graphing program).
Labels:
algebra,
computation,
Formula,
Math,
mathematics,
shapes
Wednesday, 5 August 2009
Tuesday, 4 August 2009
Visual Math proofs
1 + 3 + 5 + ... + (2n − 1) = n * n
I have always loved visual math proofs like these. The one above proves that the sum of 2n - 1 for any integers ranging from 1 to n is n squared. I think it is very important to understand that problems that seem hard under one representation may seem very easy if they are represented another way: sometimes we can solve problems just by changing the way we look at them.
Subscribe to:
Posts (Atom)