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Showing posts with label Mathematics. Show all posts
Showing posts with label Mathematics. Show all posts

Wednesday, September 5, 2018

Mathematics - my first love

[Dedicated to all my friends who know me really well and were with me during the times described below, all my teachers who loved me for what I was, and to all my students who liked me for the reasons only they know :) Happy Teacher's Day!]

"Is There a ‘Right’ Way to Learn Math?" - I read this article today and I could relate to this article so much that I felt I was writing the first few paragraphs myself..

The exact example of the relation between multiplication & addition happened with me too, and incidentally that was my first thrilling experience with the subject. When I discovered that 2 x 3 is the same as 2 + 2 + 2, I was thrilled, but when I realized that is is same as 3 x 2 and further that all of these also equal 3 + 3, I wanted to jump out of joy. The excitement continued for a few days, those few nights were my best sleep nights.

And my fascination for Mathematics continued, for a really long time particular fascination of numbers remained, while other areas like Trigonometry & Calculus enjoyed their own share of charm as well. Whatever the teacher taught in the class, used to just get imprinted on to my mind (I have a good memory people say, I agree too though it is slightly fading away - as much as I don’t want to admit, people grow old and I am no exception! :) I do have a strong photographic memory too), I never needed any repetition of any concept, anything. Once, was enough, most likely because I was in love with the subject. While I was a really studious student, I used to religiously revise what was taught in school that day and read things myself - before & after type of a thing to understand the basics of the concept taught. I would rightly guess exactly what questions would come in the exam, and when I come out of my exam I would know exactly how much would I score because I knew exactly how many marks would be cut for what kind of mistake. I never got anything without hard work, real hard work. If at all I missed a small concept, small snippet of something, that one small little thing will appear in the exam. The pattern continued through my childhood and I got real tight slaps from my mother when I lost marks because I didn’t revise that one little tiny thing. Many of my classmates did really well even without studying as religiously as me. I realized ‘luck’ wasn’t for me. I grew up to become even more studious hence. While in college, I used to sit with the calculator (the scientific calculator - it was Orpat, this one) for hours together just like that playing with numbers, I discovered the pattern:
1 x 8 + 1 = 9
12 x 8 + 2 = 98
123 x 8 + 3 = 987...

The differences between say 12 x 6 and 16 x 2; 15 x 7 and 17 x 5 and why those patterns and so on, by myself.

Unfortunately, I didn’t have anyone around to share my excitement. There was something about the subject, about those numbers, all types of numbers, those theorems, the parabolas, the hyperbolas, the tan thetas and sin thetas and cos thetas. Questions like ‘why was the derivative of sin theta, cos theta?’ - I would think of these questions myself and I would find answers. It was true nirvana! Two specific instances I remember from my college days are:
1. f(x) = 1/ax: My professor who used to teach us Linear Algebra, asked a question casually once on something on some function. He described some unique thing about that function and asked us to guess and let him know the next day. All that day - during the class, after the class, during my commute to home after college, doing my household chores I kept on thinking. Suddenly, while I was doing the dishes at home late evening that day, there was a spark in my mind. I had the answer. The function was f(x) = 1/ax. Next day in the class, he asked and I answered. I was confident it was true because it was satisfying all the clauses mentioned. My professor reacted ‘Vhery good’, and he would almost jump off the dias. ‘Very good’, he repeated!
2. Two lines of regression: Related to Mathematics, my profound love to Statistics also grew. I was particularly in love with Regression as a topic. And while reading through this book Fundamentals of Mathematical Statistics by Gupta & Kapoor (this book), I found something very different from what I usually worked on. Usually, there is a regression line and we have a dependent variable and an independent variable. At least I, never thought of the case when we interchange the roles of the 2 variables. Hence, comes the concept of 2 lines of regression. This was not my discovery though, but there was something about this concept. I read the entire chapter twice and thrice to just multiply the thrill. I wished before the exam that that question should come and I would answer, and it did, and I answered like I achieved nirvana! I had this thing, I would leave all simple questions, pick up the ones that are challenging, and answer them first. Feel the nirvana and then answer the rest of them which didn’t matter much, from the nirvana standpoint. It worked, my hands ached after every exam because my mind ran faster than my hands & fingers and my hands & fingers used to feel literally racing with my mind. In that exam, I scored 58/100, for some reason all my answers were incorrect but I was extremely happy because that one question was there and I had the opportunity to answer that.

I grew up to teach Mathematics at school, both Maths and Statistics at college and so on. I loved teaching too, but never wanted to teach the regular topics, though some of my students felt the same way I felt as a student, on some concepts that I would consider basic by then. So, I could relate. I loved teaching because I liked learning, the thrill remained though not that much because I was ‘working’ and always chasing a deadline, in this case covering up the entire syllabus.

Anyway, life after that wasn’t as interesting.

Wednesday, January 2, 2013

What age does to you!

One more year gone, another started. The first thing I think is that I would become one more year older this year! It comes with a lot more ambition to me & a resolution to start working towards those personal preferences which throw guilt to me always since I am not able to give time to them! Hmmm...till I was a minor, I awaited the time when I turn 18 & I would be eligible to start working, ACTUALLY! I was the youngest always among the peer group (though I never looked like one thanks to my South Indian background! - no offence), I went to school one year earlier than usual, I skipped a class in between due to some stupid test for a higher standard that I passed & so I didn't know the Archimedes Principle till the end of next class (so, as per my peers I was 2 classes behind in knowing about that principle) and I faced desperate struggle to solve those quadratic equations in the next class since I was behind those memorized concepts from the earlier class. Well, not that any of the two above make a difference in my life now, but at that time only I know how I was not able to handle the pressure! I started my first job earlier than my peers, I finished my masters well ahead of my peers and so on.

After celebrating many new years one by one, when I started working in this company, we were too many people from the same college but different batches with about 2-3 years gap. We were all talking about things like 'oh you joined the year when I left', 'oh, strange we didn't meet on campus...' etc. etc. when a girl from another section of the office came in. One of our discussion group members generally asked her about her date of birth. The year she uttered spread a deathly silence across and we had our jaws dropped. One of my friends in that group & I shared a stare with each other, in that same shock! And my friend smartly said, 'okay, I better not ask that question again to anyone!' and that silence converted into a huge laughter with a hidden <tch> :)

Yesterday my school friend called up after a long time & when I shared the news of my younger sister's marriage, she got astonished & said, 'why so early!', I had to remind her it was not a child-marriage & we are much older now :)

Each of us from all my past friends groups have moved on to take different career paths & personal hobbies since then but when I think back one thing I realize is we are still the same people. The only thing I conclude is you change forcibly or voluntarily to adapt to the different circumstances that come to you by themselves or by your own creation, which has unfortunately happened to some of our friends. But you still have that 'yourself' within you and given an opportunity, you would want to remain that same you.

If we were 15 when John Abraham was 30 and we admire him, why should anything change when we turn 35 & he turns 60! [Like that news snippet about our elders (women) being sad & not doing household work for a few days when Rajesh Khanna died :) Deadly that was, whoever's thought that was!]

Happy New Year!

Sunday, May 22, 2011

If only there was no gravity!

I am into my 2nd week of the yoga classes. Okay, it is tough!

After a couple of minutes of stretching hard exercises in sitting position, the instructor commands to lie down in shavaasan & relax. What a relief!

Then another command follows - "lift your left leg up, 10 degrees above the ground - well I think it is practically impossible to lift it just about 10 degrees above the ground. But I keep the Mathematics teacher in me not pop up these ideas into my head and try to follow, lifting up my legs trying to keep the measurement precision as high as possible.

And the instructor wants us to hold that position for 20 seconds - first, lifting the legs up without any support of your hands is a challenge, and the 10 degrees and then holding the position - isn't that quite too much! Everytime, I am trying these postures, I feel Oh God! All this only because of one thing - gravity? It only this concept wasn't there - no overweight problem, no running after exercising options to shed those kgs (actually pounds!), and no pain inflicted on ourselves trying to maintain these postures fighting to defy the gravity :-)

And, what would have been in Ramdev baba's plate if gravity wasn't there at all!

Saturday, April 30, 2011

Air India next Continental?

The best thing in the MBA courses is a bunch of case studies, mainly from HBR ofcourse! It is said that 'Strategy' is the most used & most misunderstood word. I guess so.

We had a course named 'Operations Strategy' - aren't these two words exact opposites of each other in meaning? Operational excellence or efficiency is something that shows the results in the income statement i.e something that can be measured in numbers almost with an immediate effect - an assembly line is refined at an automobile manufacturing unit & it produces more vehicles - immediate numbers. Whereas any strategic initiative taken doesn't show immediate impact in numbers, and probably never would show as high impact in terms of numbers as that by operational efficiency, but it makes an amazingly powerful non-measurable impact - things like just addressing the staff in your restaurant by name; this is where I face the biggest paradox of my life - disliking the subject I am most interested in: Mathematics! And I dislike agreeing that Maths fails to measure the most important parameters, anything that cannot be measured in numbers. We could dig deep into these - operations vs strategy & maths not being useful enough, may be some other time.

One of the cases that we studied in this course was of the turnaround of Continental Airlines - a classic case [Click Here to download the case, thanks to Google I found the pdf] of how small things make a great impact and how consistency in certain practices take a drowning company to a path-breaking one.

Why I was thinking of strategy is because of a couple of Air India's announcements. Recently I went to Toronto & chose Air India for various valid reasons. What an awful experience I had! You could read in detail Here if you want to enjoy the details. I just want to tell them if they don't want to serve, better stop serving. I read the news of Air India wanting to turnaround, and achieve similar heights probably as that of Continental per the captain's statement. And then I read another news piece about the company cutting down the operating costs. Woo! Has the first step itself gone wrong, shouldn't the first steps in an attempt to turn around be focussed on strategic initiatives which probably would cause a hike in operating expenses initially & then with loads of seamless efforts, eventually profits would be made.
Can Air India do the turn around? Well, nothing is impossible so to say and I am very pessimistic about believing that this company can do a turnaround, but definitely extensively intense efforts are needed.

Let's wait & watch!