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Susam Pal
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Rewrote ( from scratch in order to publish a cleaner implementation of this tool under the terms of BSD 2-Clause License. The previous implementation was a poorly designed one night hack.

It now supports LaTeX, Markdown and HTML. Visit to see the source code or report issues.

#math #latex #markdown #html #mathjax ( ) is now free and open source software ( ). now supports Markdown along with LaTeX and HTML.

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My 25 day challenge for 2013: Learn ray tracing with POV-Ray:

My second 25 day challenge: Ray tracing with POV-Ray:

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Inspired by +Matt Cutts' 30 day challenges, here is my first simple and easy 25 day challenge: A new idiom a day -

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I learnt just now that the word "meme" was coined by Richard Dawkins in his book 'The Selfish Gene'. Quoting from the book:

"We need a name for the new replicator, a noun that conveys the idea of a unit of cultural transmission, or a unit of imitation. 'Mimeme' comes from a suitable Greek root, but I want a monosyllable that sounds a bit like 'gene'. I hope my classicist friends will forgive me if I abbreviate mimeme to meme. If it is any consolation, it could alternatively be thought of as being related to 'memory', or to the French word même. It should be pronounced to rhyme with 'cream'."

A person traveled from Bangalore to Kanyakumari with his mobile phone. He wasn't charged roaming fees. But as soon as he took a step into the Indian ocean, he was charged roaming fees. Why‽

(This PJ is released under the CC BY-ND 3.0 License. Yes, this means you always have to use the interrobang (‽) in speech or text while sharing this!)

The media should stop referring to the Higgs boson as the 'God particle'. It misleads many people into believing that the existence of the Higgs boson would prove the existence of God. No, it won't! There is no known science experiment that can prove or disprove the existence of God. "God exists" is not a falsifiable proposition, and it isn't a scientific theory.

I'm wondering if is a list of typos or whether the phrase "the presence of absence of X" means "the presence of Y where Y is the absence of X". This phrase also occurs in the disclaimers of Creative Commons licenses:

"Unless otherwise mutually agreed to by the parties in writing, licensor offers the work as-is and makes no representations or warranties of any kind concerning the work, express, implied, statutory or otherwise, including, without limitation, warranties of title, merchantibility, fitness for a particular purpose, noninfringement, or the absence of latent or other defects, accuracy, or the presence of absence of errors, whether or not discoverable. some jurisdictions do not allow the exclusion of implied warranties, so such exclusion may not apply to you."

If it's a typo, it doesn't make sense to disclaim the presence or absence of errors. It's difficult to ensure the absence of errors, so the license must disclaim it to avoid trouble later, but it is really easy to ensure the presence of errors, so it makes no sense to disclaim it.

If it's not a typo, why can't the license just disclaim the absence of errors? Someone in Freenode #fsf channel told me, "That would make too much sense."
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