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oluckyman

76 karma · joined March 5, 2012

https://github.com/paulpritchard
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oluckyman··on Show HN: I built an active community of trans people online
But many trans women have no hormonal or surgical interventions at all. Are you implying that cis lesbians are not attracted to them?
oluckyman··on Show HN: I built an active community of trans people online
Indeed. It's hard to believe that until relatively recently people thought that sexual attraction was fundamentally based in biology rather than identity.
oluckyman··on Can you get root with only a cigarette lighter?
Depends how desperate for a smoke the other person is.
oluckyman··on On light, colors, mixing paints, and numerical optimization
Nice description! For project of this type that has been going for 20 years, and covers many different paint sets, see https://zsolt-kovacs.unibs.it/colormixingtools
oluckyman··on Dijkstra's interview on Dutch TV (2000)
I was a visiting professor there in 1989, and sat in on the course, which was on math proofs. We had weekly homework, which I did. In one class, I told Dijkstra that his proof was wrong. He couldn’t see my point, and we argued briefly and agreed to disagree. It was the only time anyone spoke up in class without being asked to by Dijkstra. At the start of the next class, Dijkstra announced that his attempted proof was indeed wrong, and proceeded to give a revised proof. Everyone was impressed by his intellectual honesty. He wrote up the episode as EWD 1044 https://www.cs.utexas.edu/users/EWD/transcriptions/EWD10xx/E...

Dijkstra asked me to sit in on one final oral exam which he was expecting to be tricky. It was a very intimidating atmosphere for the student.

oluckyman··on Bob Dylan's Christmas Lights: A Scholarly Treatise
In a similar but visual vein, here’s a Mad Magazine style treatment of the great man’s song Ballad of a Thin Man: https://paulpritchard.github.io/Ballad_of_a_Thin_Man/
oluckyman··on Why do prime numbers make these spirals? (2019)
A “higher order prime sieve” indeed: https://en.wikipedia.org/wiki/Sieve_of_Pritchard
oluckyman··on North Korean hackers stole a record $1.7B of crypto last year
Speculating on crypto is like gambling where the house takes a 50% cut.
oluckyman··on One long circular argument (2017)
From the article:

Dennett models the mind on the idea of the computer. But computers are the products of human designers. Hence it makes no sense to try to explain the mind in terms of computers, since the existence of a computer itself presupposes the existence of a designing mind.

I read no further.

oluckyman··on Negative-Weight Single-Source Shortest Paths in Near-Linear Time
Very nice indeed to see a simple algorithm in an area recently dominated by complex beasts. Gives me those great 70s vibes. Seems like a major result. Would love to hear from an expert in the area.
oluckyman··on How quickly do algorithms improve?
In section III B (p.8) the paper states that “in 1982…Gries[24] devised another linear algorithm” for the maximum subarray problem. I remember that. Jon Bentley visited Cornell, and posed the problem to me and Gries together. We thought on it independently overnight and presented a linear solution to Bentley the next day. Gries had a simpler invariant, and I had simpler code (using min). I never knew he wrote the paper until now, and am not one of the several people he mentions in the Acknowledgement, although he does say “Bentley…challenged US with this problem”.
oluckyman··on How I learned to draw realistic portraits in 30 days
Having just completed a drawing unit in art school, for which a major assessment task was a self-portrait in graphite pencil, I can say with some confidence that this is an unusually good account. Hell, it's excellent.
oluckyman··on Severely deficient autobiographical memory in healthy adults (2015)
I'll add my voice to the chorus that says this is a symptom of a more fundamental issue: aphantasia. As a card-carrying aphantasiac, I'm skeptical of the ability of most people to visualize. I recall hearing of an experiment in which people were asked to draw a bicycle from their imagination. The results were laughable, yet, no doubt, the subjects would self report that, sure, they could visualize a bicycle.
oluckyman··on New Proof Settles How to Approximate Numbers Like Pi
Wow. Maynard FTW yet again. A Fields medal down the track would be no surprise at this rate. He has several more years to qualify.
oluckyman··on Petrichor: why does rain smell so good?
My fave song about petrichor is by Paul Kelly: https://youtu.be/A9_qkTeMlGk
oluckyman··on Aphantasia: 'My mind's eye is blind'
It’s helpful, but if the task is to draw the imagined bicycle, then you would presumably add details as far as possible. But for most people the result is very far from what they would draw if a bicycle was in front of them. So what they imagine is not a bicycle. So most people can’t imagine a bicycle.
oluckyman··on Aphantasia: 'My mind's eye is blind'
Then the “images” most people say they can imagine in their “mind’s eye” might be little different from what an aphantasiac like me would produce if asked to draw them. Perhaps I am not missing much at all.
oluckyman··on Aphantasia: 'My mind's eye is blind'
Most people could draw a bicycle well enough while looking at it. But most people are hopeless when asked to draw a bicycle from their imagination. But most people don’t have aphantasia. I do, so am sceptical when people say they can picture a bicycle (say) in their “mind’s eye”.
oluckyman··on Robert Langlands: The Greatest Mathematician You’ve Never Heard Of?
“Langlands’s”! Now that’s eccentric.
oluckyman··on Ask HN: What's one book that changed your life?
Why I Am Not a Christian, by Bertrand Russell (1), 16 years of Catholic indoctrination (0).
oluckyman··on You’re never too old to become fluent in a foreign language
The commentary misrepresents the original study as much as the popular press coverage it criticizes.

From the Abstract of the study:

“grammar-learning ability...is preserved almost to the crux of adulthood (17.4 years old) and then declines steadily”

“The results support the existence of a sharply-defined critical period for language acquisition”

From the commentary:

“It’s not even true that young children learn languages faster than older children or adults”.

oluckyman··on Up a Wombat's Freckle
mate
oluckyman··on Rooting a Printer
Australians: not what you thought it meant. Nothing to see here. Move along.
oluckyman··on The Best-Paying Internships in America
Gotta be Axe Capital, surely.
oluckyman··on Increasing Testosterone by Shining Light on Your Testicles
The shining light angle is close to clickbait, since it's presented as a lower-order hack at best. But the article itself is comprehensive and interesting. The focus is on looking for hacks that might work, so medical studies are cherry picked rather than deeply investigated, but that's to be expected. After "lifestyle" advice on diet, sleep, and exercise, creatine supplements were highly recommended.
oluckyman··on Image-to-Image Translation with Conditional Adversarial Nets
Neural nets! Is there anything they can't do?
oluckyman··on Extraordinary claims require extraordinary proof
I'm not aware of any evidence that his "Dr." title is accurate.
oluckyman··on UC Davis spent thousands to scrub pepper spray references from Internet
"UC Davis spent thousands...". Shades of Dr Evil.
oluckyman··on Dijkstra's Prime Number Algorithm
The algorithm is indeed incorrect, as I've explained in a more recent comment on the article.
oluckyman··on Dijkstra's Prime Number Algorithm
Given its author, it would be even more remarkable if this algorithm was incorrect. See my comment on the article.
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