Category Archives: Other Voices

Exponential Growth Story

Raza Abbas at 3QuarksDaily linked to a post on X by Magnus Hambleton which Abbas titled, “Which Door Would You Choose?”.

This is a fascinating, fun story about exponential growth and computers, in particular computer arithmetic, which I have annotated a bit for those less familiar with some terminology:

“I chose the green door ninety-three days ago.

At the time, it seemed obviously correct. Not even a close call. The red door offered two billion dollars immediately—a sum so large it would solve every material problem I’d ever face, fund any project I could imagine, and still leave enough to give away amounts that would meaningfully change thousands of lives. But two billion is a number. It has a fixed relationship to the economy, to the things money can buy, to the world.

The green door offered one dollar that doubles every day.

I remember standing there, doing the mental math. Day 30: about a billion dollars. Day 40: over a trillion. Day 50: a quadrillion. The red door would be surpassed before the first month ended, and after that, the gap would grow incomprehensibly fast. Choosing the red door would be like choosing a ham sandwich over a genie’s lamp because you were hungry right now.

So I walked through the green door.”

See an Exponential Growth Story.

 

MAGA Math

An article by Lee Moran in Huffpost is rather remarkable.  Apparently someone failed grade-school math.  I wonder how he got through medical school, especially the pharmacology course.

“NBC News’ Kristen Welker on Wednesday asked Mehmet Oz — the former talk show host and heart surgeon who now runs the Centers for Medicare and Medicaid Services — about President Donald Trump’s repeated claim, mockingly dubbed “MAGA Math,” that he’ll get pharmaceutical companies to lower drug prices by more than 100%. Continue reading →

Tom Lehrer New Math

I see another icon of the past has passed away: Tom Lehrer. Lehrer was a mathematician who put his talents to great use, in contrast with mathematicians like the neocon Paul Wolfowitz and Iraqi Ahmed Chalabi who helped foment the Iraq War.  He skewered all the shibboleths of the times (1950s and 60s) with his pre-politically-correct take-downs, mainly to the music of Gilbert and Sullivan.

Among his targets was the “New Math”—the Common Core of 60 years ago and a reminder that some things never change.  Fortunately, the New Math infiltrated public schools after my time, but you will recognize that its purpose is for students to understand math and not just perform rote manipulations.  A truly noble intent, but its continued reincarnation indicates how difficult it is to achieve.  So we are left with humor at our folly.

This video of “New Math” is from a live 1965 performance of “That Was the Year That Was”.  A more famous song is Lehrer’s musical rendition of the chemical periodic table, “The Elements” (performed live in 1967 in Denmark).  I invite you to listen to all his songs for an irreverent window into the past.

See “Tom Lehrer Dies at 97” for a PDF copy of his obituary.

The Passing of an Era

On March 7 one of my favorite bloggers, Kevin Drum, passed away from a longtime fight with cancer.  To say he will be sorely missed is great understatement.  From my limited perspective, his was the last of the original type of weblog, namely one written by a single person with multiple postings per day.  And his perspective was unique.  It was the only blog I’ve seen that largely concentrates on data analysis of economics, science, medicine, societal trends, and on and on, in a clear, succinct, and informative manner.  The text is further supported with simple graphs that provide visual clarity to the analysis.

See The Passing of an Era

Survival of Records

I have written about this a bit in my “Symbolic Algebra Timelines” post as part of the discussion of how Greek mathematics got transmitted to the present.

I had read an article by the renowned literary historian Gilbert Highet some sixty years ago which I never forgot.  It discussed in some detail the miracle of the survival of records from the past.  I tried to find a copy online, but in vain.  So I purchased a used 1962 copy of the now extinct Horizons that contained the article and proceeded to digitize it.  Since the subject of the article is about disappearing writings of the past and how some managed to survive through reproduction, I feel it somewhat apropos that I allow it to see the light of day again.  He is a marvelous writer and covers the subject with fascinating detail.

Even with all the losses Highet records, writings still survived because they were in some sort of hard copy form. By 1962 fragile documents such as newspapers were being moved to microfilm.  But microfilm was often replaced by magnetic tape, which was in turn replaced by a succession of digital media: floppy discs, CDs, DVDs, memory sticks, and so on. Finally, local media is being replaced by files in the “cloud”. All these media are subject to deterioration and loss, or the whims of the custodians. And of course, they all need machines and software to retrieve their information—technology which may no longer exist. Terabytes of moon data are lost on Ampex magnetic tapes for which there are no analog tape readers or even records of the data formats. Even now, some books are being published electronically and not in hard copy.  Some people have referred to this ephemeral situation as the “digital Dark Age” where everything can be lost—often in an instant.  So perhaps we are lucky that records from the past were not digital.

My copy of Highet’s article appears in two forms: a full, but very large, version with all the color figures, Survival of Records (58 MB), and a text-only smaller version, Survival of Records wo figs (700 KB).

Counting Tanks

A great example of the application of simple math to real-world problems is provided in a recent Numberphile video on YouTube by the British mathematician James Grime.

It is taken from a real story from World War II where the British were trying to estimate the number of tanks the Germans were producing each month.  The spies came up with an estimate of about 1500 tanks per month, whereas the mathematicians estimated the number to be closer to 250 tanks per month.  How the mathematicians did this is explained by Grime.  (I added an explanation of one step that whizzed by in Grime’s presentation and that I didn’t understand at first.)

See Counting Tanks.

Aunt Hillary and the Anteater

In this moment when the collective actions of humans seem to be hurtling towards several cataclysms (burning up the planet, ending the American Experiment), I am reminded of a powerful image that invaded my psyche some 45 years ago.  It was from Douglas Hofstadter’s magnum opus, Gödel, Escher, Bach (1979) and concerned his investigation of what became popularized as “emergent behavior” and “self-organization.”  This was in the early days of chaos theory and Holland’s emerging complexity theory.  Conway’s artificial life cellular automaton, the Game of Life, was the screen saver on countless computer terminals and burgeoning personal computers.  It was also the time when neural nets were beginning to capture the imagination of machine learning researchers among the artificial intelligence community.

Hofstadter’s aim was to explore these ideas as they related to understanding the brain and he used the vehicle of an ant colony.

See Aunt Hillary and the Anteater.

Also see the excerpt Ant Fugue (2.5 MB) and the Atlantic article “What the Microsoft Outage Reveals”.

Danica McKellar Interview

I recently watched a remarkable and surprising interview on Numberphile of the actress Danica McKellar.  She began as a child actress and recently has played romantic roles on the Hallmark series of TV movies.  So it comes as a surprise to find she was an undergraduate math major, and with a female colleague and the help of their advisor one summer proved a theorem involving math and metallurgy.

She was terrifically articulate and enthusiastic during the interview and made a number of telling observations that would be helpful for any student, especially girls, who might find they like math in grade school and might even consider majoring in it in college.

Her big emphasis was on self-esteem and the importance of reaching girls to support any interest they might have in math against the negative forces they often experience.  To this end she has written a series of math books, each tailored to a different grade-level of students.  But she feels the middle school years are especially critical to support girls in math.

Perhaps the thing I liked best in the interview (maybe because it echoed my own views) was her attitude towards math—she loved solving puzzles.  In fact, just doing math was its own reward.  She politely deflected all efforts by Brady, the interviewer, to ask if she regretted not pursuing a professional career more devoted to math.  Not to knock Brady’s fine interview but I found this line of questioning supporting the current utilitarian view of education (What good is it, how can it be of use to help me earn a living) to be a bit condescending.  And there was even a whiff of what the most important thing to do with math and what the professors are training students for is math research.   Since most math majors and even math Ph.D.s are not going to find employment in academia, math as an ancillary component to one’s career is the most one could imagine in this context.  But above and beyond that is the real truth: math is fun for its own sake, and Danica McKellar championed that in spades.  I don’t think I have seen anyone unabashedly extol the joys of doing math as well as she did.

I heartily recommend this interview to anyone, especially young girls, who might have a secret affection for mathematics but fear some stigma that might attach to them if they admitted it.

Some links from Youtube:

For a PDF version see Danica McKellar Interview.

A New Day

One of the physics blogs I enjoy reading is by the mathematical physicist Peter Woit, called Not Even Wrong.  A recent post provided a tantalizing teaser:

“I want to [link to] an insightful explanation of the history of string theory, discussing the implications of how it was sold to the public. It’s by a wonderful young physicist I had never heard of before, Angela Collier. She has a Youtube channel, and her latest video is string theory lied to us and now science communication is hard.

… It’s as hilarious as it is brilliant, and you have to see for yourself.”

Collier delivered her talk lucidly and thoroughly—all while playing a frenetic video game!  She claimed she used the length of the game to time her talk.  Of course we can walk and talk, and ride bicycles and talk, but I have never seen anyone split their mental concentration between a fast-paced video game and an esoteric physics explanation of the history of string theory and supersymmetry—for over 50 minutes!  And there was something about her presentation that was completely captivating.  It was definitely a serious scientific talk, but the ludicrousness of the game-playing echoed how ridiculous the continued, misplaced fascination with string theory is.  Naturally I had to learn more about this provocative physicist.

See A New Day

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