November 2010
1 post
5 tags
Traveller's Ancedote, an open mail to redbus
I have been a regular user of redbus for the past one year and had some annoyances, issues with redbus. I decided to mail them and see what they feel about those issues. I got an impromptu reply from their head of marketing and I am publishing the email publicly just for the benefit of everyone.
Here is my mail followed by their reply.
Hi,
I have been a regular user of Rebus since last year...
December 2009
4 posts
3 tags
Excerpts from Leslie Lamport's Interviews
Sources:
A Discussion with Leslie Lamport
An Interview with Leslie Lamport
1. When asked about some of the important problems in distributed systems.
On the theory side, recognizing a problem has been harder than solving it. Since you are asking about problems that are already recognized to be problems, the answer is probably none. On the practical side, I don’t think I have any more...
2 tags
Ordered Pairs in Naive Set Theory
Ordered Pair
An ordered pair of a and b, with first co-ordinate a and second co-ordinate b is defined by,
(a,b) = {{a}, {a,b}}
The proof for the above ordered pair is given by,
If (a,b) and (x,y) are two ordered pairs, then (a,b) = (x,y) if and only if a=x and b=y.
Proof:
If in case, a = b, then, (a,b) => the singleton set of {{a}} or the singleton set of {{b}}.
Also, conversely, if...
2 tags
Compliments in Set Theory
Relative Difference If A and B are two sets, then the difference between A and B, the relative compliment of B in A, is the set A - B defined by (note that = is just a abuse that we use to ϵ) A − B = xϵA : xϵ′ B This does not necessarily mean B ⊂ A But when the above condition holds true, then A − B = A − (A ∩ B) For the sake of simplicity, we assume a set U , the universe on which we can...
2 tags
Asymptotic Notations
Why use Asymptotic analysis? Since its a well known fact that for a small input set, all algorithms perform well regardless of the complexity, so to determine the complexity we need to analyze the algorithm for large values of n , typically n -> infinity. Also we need to bound the computed value between two values(a range) , or in short create a subset within which the execution time of the...
October 2009
1 post
5 tags
Ignite talk on Cloning Einstein
Recently, i gave a talk in Ignite Chennai. The idea of Ignite is , if you are given 5 minutes and just 20 slides, What would you say? The idea is to present ideas concisely and briefly and ignite thoughts in the minds of listeners. In Chennai, this is the first ignite that is held and was conducted by Thoughtworks, the company where i currently work on. This is article is derived from the talk...