Marshall’s Weblog

Apparently there is a lot of discussion out there as to the validity of this statement. The main argument for equality goes something like this. Say x = 0.99999… (or commonly expressed as .9). Multiply both sides by 10 and you have 2 equations that you can subtract from each other.

10x = 9.9999999…
- [...]

[Read more →]

Programmable Water – An MIT student creates logic gates that switch with the power of water.
NetLogo – A programmable modeling environment
Earth’s Hum – Earth’s Hum is explained by scientists as being caused by waves in the oceans. If you haven’t heard Earth’s hum, well, that is because you can’t. Only the most sensitive seismometers can [...]

[Read more →]

Apple Inc. + Google + Yahoo + Cingular = iPhone!

I know I will be buying one in June when they come out.

[Read more →]

I just found out about a little math game called Four Fours. Basically what you try to do is try to represent integers using only the number 4 and a few common mathematical operators, for example:
0 = 4 – 4 + 4 – 4
1 = ( 4 + 4 ) / ( 4 + 4 [...]

[Read more →]

The American Mathematical Society has a fairly indepth article on how Google computes the PageRank.

[Read more →]

Quake 3 has a the following bit of code to calculate the inverse square of an integer.

The i = 0×5f3759df – (i >> 1); is the most curious part of the function, and apparently is has to do with Newton’s Method, which is an efficient way to approximate the roots of a function.
( via [...]

[Read more →]

I found another funny web comic, Questionable Content, which reminds us that Math is Delicious!

[Read more →]