John Gabriel (a non-mathematician) claims in his blog that the real numbers are countable. The author tries to enumerate the real numbers in the interval [0, 1) by writing out all those whose decimal representation has one digit after the dot (0.1, 0.2, …, 0.9), followed by those with two digits after the dot, then those with three digits, and so on.
He goes on further to say that this establishes a procedure for writing
down an ordered sequence of numbers in which every real number of the
source interval will appear eventually (although, it should be clear
that any number with an infinite decimal representation will never
occur in his sequence of numbers).
This argument shows that the subset of real numbers between 0
and 1 that have a finite decimal representation is countable. Although,
it fails to work for the interval [0, 1).
It’s rather entertaining to watch fellow mathematicians humor him. Either way, things like this happen all the time .
Two excellent “Sine Flu” comics!! See below.
The first comes from LukeSurl.com. His comics are very good. I haven’t read all of them yet, but it’s one of the things on my to do list
The second is the popular Brown Sharpie. I love the Seinfeld twist! errr Sinefeld
This Brown Sharpie comic is great
Just the other day, there was some math profs in the department talking about crafts and knitting. Apparently, they have their own little club and are meeting for craft night!! :-\
For some reason, both xkcd and Abstruse Goose comics today were very entertaining to me!! Yay!
By the way, today’s Abstruse Goose comic references one of my favorite movies (and I don’t mean star wars! arrg). Check it out, hilarious! Here is a hint.
Are people actually subscribed to my silly blog?
The majority of traffic comes from google. The keywords “math fail” takes the lead followed by key phrases that have both “math” and “sex”. According to my search, some other site has the top position for math sex on google (without quotes)!! GRRRRrrrrrrrrrr…… I strive to be #1 for math sex!!! Perhaps if I make more math sex pages on my site hmm….
This is a neat little paper regarding the number 3435. Basically it has the following property:
3435 = 3^3 + 4^4 + 3^3 + 5^5
More interesting is that the only other number with this ‘property’ is the number 1. The property is what he calls a “Munchausen Number“. The preprint was written by Daan van Berkel and can be found on the arxiv.
Some mathy looking tattoos on these 4 girls backs ^_^. Too bad the girls aren’t geeky enough to get real tattoos
1. the usual ghosts
It’s a comic about life, science and ghosts. Sometimes has potty humor. Sometimes is geeky in the sciencey kind of way. Not very mathy though , and doesn’t seem to update often.
My favorite from that site (click to visit the site):
Another good one from “the usual ghosts”:
2. Peebles Lab
Physics related webcomic. Very mathy. Also very good. I”ll probably write more about it in the future ^_^. Check out a sample below which starts a short series called the “Derivative Series”. It’s a fun read.
Saturday Morning Breakfast Cereal has a funny math comic today. Check it out:
Very nice motivation.
You might have seen this before, it seems to have made its way around the internet. It’s called Charlie Smith’s Happy Face Math:
- 1st one is the inverse (ie, upside down)
- 2nd one is being squared (hence the square)
- 3rd one is being cubed (hence the cube)
- 4th one is supremum, but you read it as “soup“, hence the soup
- 5th one is the partial differential operator, hence the “part of a face”
- 6th one is sine function, read as “sine”, which rhymes with “sign“, hence the sign
- 1st one is the “real part” of a number/function, hence, there is no imaginary part. For example, Re( a + bi ) = a. Thus, you remove the i’s.
- 2nd one is imaginary part. Im( a + bi ) = b. In this case, you only keep the i’s.
- 3rd one is the curl, hence the curly hair.
- 4th one is the gradient function, read as “grad“, hence the smiley face looking like he just graduated from school.
- 5th one is the log function, hence the smiley face on a “log” (tree thingy)