# Category Archives: Computer Science

# Quora question: Cryptography: Why does Blackerry Ltd (formerly R.I.M) hold most of the patents related to Elliptic Curve Cryptography (ECC)?

RIM purchased Certicom which was the company built purposely on a few ECC implementation patents by a few University of Waterloo professors. Not only owning the patents by these people at Waterloo, Certicom also stole every single idea by anyone who gave a seminar Waterloo as a graduate student, postdoc or just a visitor, and patented it under Certicom’s name!!! [This is really true and I know at least one specific instance of it]

# Erdős Dictionary …

**Paul Erdős** (26 March 1913 – 20 September 1996) was a Hungarian mathematician. Erdős published more papers than any other mathematician in history, working with hundreds of collaborators. He worked on problems in combinatorics, graph theory, number theory, classical analysis, approximation theory, set theory, and probability theory. He is also known for his “legendarily eccentric” personality.

He had his own idiosyncratic vocabulary: he spoke of “The Book”, an imaginary book in which God had written down the best and most elegant proofs for mathematical theorems. Lecturing in 1985 he said, “You don’t have to believe in God, but you should believe in *The Book*.” He himself doubted the existence of God, whom he called the “Supreme Fascist” (SF). He accused the SF of hiding his socks and Hungarian passports, and of keeping the most elegant mathematical proofs to himself. When he saw a particularly beautiful mathematical proof he would exclaim, “This one’s from *The Book*!”. This later inspired a book entitled *Proofs from THE BOOK*.

Other idiosyncratic elements of Erdős’ vocabulary include:

- Children were referred to as “epsilons” (because in mathematics, particularly calculus, an arbitrarily small positive quantity is commonly denoted by that Greek letter ε
- Women were “bosses”;
- Men were “slaves”;
- People who stopped doing math had “died”;
- People who physically died had “left”;
- Alcoholic drinks were “poison”;
- Music was “noise”;
- People who had married were “captured”;
- People who had divorced were “liberated”;
- To give a mathematical lecture was “to preach” and
- To give an oral exam to a student was “to torture” him/her.

# My profile at Google Scholar …

**h-index:** http://en.wikipedia.org/wiki/Hirsch_number

Hirsch suggested (with large error bars) that, for physicists, a value for h of about 12 might be typical for advancement to tenure (associate professor) at major research universities. A value of about 18 could mean a full professorship, 15–20 could mean a fellowship in the American Physical Society, and 45 or higher could mean membership in the United States National Academy of Sciences

**i-10 index:** http://en.wikipedia.org/wiki/I10-index

The **I10-index** indicates the number of academic papers an author has written that have at least ten citations from others. It was introduced in July 2011 by Google as part of their work on Google Scholar, a search engine dedicated to academic and related papers.