## Tuesday, August 29, 2017

### Coraline

So on August 19, 2017.  I read Coraline. I wanted to read this for a while after seeing Neil Gaiman's commencement speech. I read the graphic novel version and it was fun. The story is about a girl whose name is coraline and has moved with her family to a country house. The house is big and there are other people who live in this house including two women who were once actresses and an old man who is training his rats for the rat circus. Her parents are buys and Coraline discover a door which opens to a wall. She discovers a whole new world on the other side where she has a family which is more loving. Everybody on this other side (kind of reminds you of through the looking glass story) is very loving and happy and their eyes have button hole. The story is about how Coraline escapes this world.

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## Monday, August 21, 2017

### Physics basic Concepts

In this set of lectures we visit dimensional analysis. We will see what are the basic graphs between displacement time, velocity time and acceleration time tells us.

## Sunday, August 06, 2017

### Blankets

I searched through my archives and I had read this book 8 years back on Jan 20,2009. I had got this book from Carbondale Library. So rereading again was fun on my iPad. It's a story about Author Craig Thompson's first love and his overly religious family. His chilhood and growing up in cold Wisconsin. Being bullied at school and finding his first girlfriend at a church camp. Being head over heels and after doing all the cutesy stuff he decides to visit her for two weeks in the midst of her parents getting divorced. She has three other siblings, two of them adopted and taking care of her sister's daughter. Both her adopted siblings have their own struggles. On his return from the reunion they grow apart and he gets rid of her presents and memories and movies to city to pursue his passion of art and discovers city life away from the religious upbringing which has tormented him throughout his high school years. Though his parents still remain very relgious.

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### Groups of Order 4

For Order 4 there are basically two types of group. Klien 4 and Cyclic Group of order 4. In Klien 4 each element is its own inverse. In cyclic group there are two elements which are inverse of each other and there are two which are their own inverses. The two which are inverse of each other are also the generator of this cyclic group.

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## Friday, August 04, 2017

### Homomorphism Z6 vs U7 example

One should notice that just finding a bijective mapping doesn't define a homomorphism (or isomorphism). The mapping should satisfy f(x+y)=f(x)*f(y) to be a homomorphism.

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## Tuesday, August 01, 2017

### Determinant and area of triangle in 2dimension

Here is a visual proof