January 2012

Why category thoery is fundamental yet hard to understand

Category theory is mathematical theory about mapping. Some call it the foundation of mathematics.

According to my understanding of math as reproducible mental object, this is not supprising. As all the brain does is doing mapping. Or in Plovian's words: conduction. Signals going from one set of neuros to another.  Understanding mapping is fundamental obviously.

Now category is billed the hardest to understand branch of mathematics, also known as "abstract nonsense". 

Review for Canine Cat Scratcher

Updated on 09/10/2013: It's now only 295 USD, with 100 USD discount!

---------------------

As a cat and modern design lover, I am always looking for cat items pleasant for both the cats and my aesthetic standard. I had my eye on the canine scratcher for a while, but its over 1000 USD price tag made it out of reach. However, recently, I found that it now costs "only" 395 USD. I pulled the trigger w/o too much hestitation since I need to buy the cats a holiday present anyway. However, I was still a little nervious at the purchase, as it would be a huge bummer if the cats don't like it. But I really love the design and can totally see how it fit with the rest of the house w/o screaming "cat furniture".

Nice place