Mathematics and Analogies

Source: Wikipedia, date indeterminate

  • Theorems = things
  • Proofs = processes

A mathematician is a person who can find analogies between theorems; a better mathematician is one who can see analogies between proofs and the best mathematician can notice analogies between theories. One can imagine that the ultimate mathematician is one who can see analogies between analogies.

Chunking Improves Memory Recall

Source: Farnham Street, Feb 2017

In 1956 George Miller, a Princeton University psychologist, set out an important principle that you’ve probably heard of in a paper titled “The Magical Number Seven, Plus or Minus Two.”

Miller revived an observation made by Scottish Philosopher William Hamilton. After throwing marbles on a floor, “you will find it difficult to view at once more than six, or seven at most, without confusion.”

More items, however, Hamilton noted can be remembered when they are “chunked.”

Memory Pegs

One can remember long strings of numbers, letters, or words when they are reconstructed into meaningful patterns, also known as “memory pegs.”

One that is familiar to most of us concerns the position of the planets in relations to the sun, which is remembered by the mnemonic aid “My Very Educated Mother Just Sent Us Nine Pizzas.” This sequence reminds us of the planetary order: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune, and Pluto. (Before you ask, I haven’t abandoned Pluto just yet.)

BIll Gates’ Advice to His 19-Year Old Self

Source: CNBC, Feb 2017
<reddit source>

If the 61-year-old Microsoft co-founder and billionaire Bill Gates could whisper in the ear of his 19-year-old-self, he would have a few things to say about what he’s learned.

Intelligence is multifaceted

“I would explain that smartness is not single-dimensional and not quite as important as I thought it was back then,” Gates says.
While he now realizes that IQ may be overrated, Gates has often emphasized the importance of being curious. An interest in the world can and should be fostered, he says.
“I think having parents and teachers reinforce your curiosity and explain what they are fascinated with makes a big difference,” Gates says.
He encourages people to remain committed to learning throughout their lives. “A lot of people lose their curiosity as they get older, which is a shame,” he says. “One thing that helps nowadays is that if you get confused about something it is easier than ever to find an article or video to make things clear.”


9-Minute Strength Workout

Source: NYTimes, date indeterminate
<read source for details>









Google and FB Dominate the Digital Advertising Market

Source: Business Insider, Apr 2017

Wieser said that both ad giants captured a combined 77% of gross spending in 2016, an increase from 72% in 2015. Facebook specifically accounted for 77% of the digital ad industry’s overall growth, he noted.

The overall US internet ad industry grew 21.8% from $59.6 billion to $72.5 billion in 2016, according to the IAB.

Related Resource: IAB, Apr 2017

Mobile advertising accounted for more than half (51%) of the record-breaking $72.5 billion spent by advertisers last year, according to the latest IAB Internet Advertising Revenue Report, released today by the Interactive Advertising Bureau (IAB), and prepared by PwC US. The total represents a 22 percent increase, up from $59.6 billion in 2015. Mobile experienced a 77 percent upswing from $20.7 billion the previous year, hitting $36.6 billion in 2016.

Refuting Group Intelligence

Source:, Feb 2017

What allows groups to behave intelligently? One suggestion is that groups exhibit a collective intelligence accounted for by number of women in the group, turn-taking and emotional empathizing, with group-IQ being only weakly-linked to individual IQ (Woolley, Chabris, Pentland, Hashmi, & Malone, 2010).

Here we report tests of this model across three studies with 312 people. Contrary to prediction, individual IQ accounted for around 80% of group-IQ differences. Hypotheses that group-IQ increases with number of women in the group and with turn-taking were not supported. Reading the mind in the eyes (RME) performance was associated with individual IQ, and, in one study, with group-IQ factor scores.

However, a well-fitting structural model combining data from studies 2 and 3 indicated that RME exerted no influence on the group-IQ latent factor (instead having a modest impact on a single group test). The experiments instead showed that higher individual IQ enhances group performance such that individual IQ determined 100% of latent group-IQ. Implications for future work on group-based achievement are examined.

It is interesting also that groups did not perform better than individuals – a genuine group-IQ might be expected to enable problem solving to scale linearly (or better) with number of subjects.

In group-IQ tasks, coordination costs appear to prevent group problem-solving from rising even to the level of a single individual’s ability. This implicates not only unsolved coordination problems, which are well-known barriers to scale (Simon, 1997) but also reiterates the finding that the individual problem-solver remains the critical reservoir of creativity and novel problem solution (Shockley, 1957).

Top Companies by Valuation (over time)

Source: Visual Capitalist, Aug 2016

Related Resources:

  1. Dogs of the Dow, updated daily
  2. Wikipedia, date indeterminate
  3. ZeroHedge, Aug 2016