Sunday, July 15, 2007

My name is Tan Yee Wei

I probably need a credit card for the odd transaction or two, such as car rental, access to porn websites and online purchase of optical instruments.

I tried an online application for a credit card; filled electronic form meticulously.

Given Name: Yee Wei
Middle Initial:
Family Name: Tan
Sex: weekly


“There was an error in the form.”
“Special characters may not be used in the Given Name field.”

Ta ma de, the space is now designated a special character. What now, am I supposed to break my name up into Yee W. Tan? Also note that the surname gets pushed rather violently to the end of the line.

Pfft. I’ll download and print the application form, then fill it in as I like.

Light Well

Click here for Deviant Art entry

The financial year is over, and this is the period when first time income earners start worrying about taxation rates. Amusingly, yesterday morning was spent in consultation with an accountant (graduate, not yet Certified Practicing or Chartered) discussing the error function (tax returns) associated with linearised tax payments and the actual, piecewise-linear taxation rate.

The field of elementary micro and macro economics contains a measure of calculus, but the power of explicit calculus is not required in solving linear problems, and thus calculus is shoved aside.

Take the word ‘marginal’, for example. Marginal always implies the first derivative. The marginal cost of producing the 51st can of worms is the cost of producing one additional can of worms after the 50th can has been produced. It is also the change in total production cost associated with the changing the output from 50 to 51.

Thus it is the rate of change of total production cost (denoted C) with respect to total output (denoted x). The marginal cost (denoted M(x)) of producing the n-th can of worms is nothing more (or less, depending on your point of view) complicated than M(x) = dC/dx at x = n.

Working backwards, the total cost of producing n cans of worms is the definite integral of M(x) with respect to x, with the limits of 0 to n.

You’re still reading? Congratulations!

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