4 ms·

A math problem stumped experts for 50 years. This grad student solved it in days

23 points by tysone 6y ago

the_solenoid 6y ago
"The principle of generating small amounts of finite improbability by simply hooking the logic circuits of a Bambleweeny 57 Sub-Meson Brain to an atomic vector plotter suspended in a strong Brownian Motion producer (say a nice hot cup of tea) were well understood. It is said, by the Guide, that such generators were often used to break the ice at parties by making all the molecules in the hostess's undergarments leap simultaneously one foot to the left, in accordance with the theory of indeterminacy. Many respectable physicists said that they weren't going to stand for this, partly because it was a debasement of science, but mostly because they didn't get invited to those sorts of parties. The physicists encountered repeated failures while trying to construct a machine which could generate the infinite improbability field needed to flip a spaceship across the mind-paralyzing distances between the farthest stars. They eventually announced that such a machine was virtually impossible. Then, one day, a student who had been left to sweep up after a particularly unsuccessful party found himself reasoning in this way: If he thought to himself, such a machine is a virtual impossibility, it must have finite improbability. So all I have to do in order to make one is to work out how exactly improbable it is, feed that figure into the finite improbability generator, give it a fresh cup of really hot tea... and turn it on! He did this and managed to create the long sought after golden Infinite Improbability generator out of thin air. Unfortunately, after he was awarded the Galactic Institute's Prize for Extreme Cleverness he was lynched by a rampaging mob of respectable physicists who couldn't stand him being "a smart arse."
- deleted 6y ago
  [deleted]
eganist 6y ago
They buried the how extremely deep in the article. Fished it out for y'all. > The day after hearing about the Conway knot problem, Piccirillo, then 27, sat down at her desk and began looking for a solution. Because much of her graduate work involved building pairs of knots that were different but shared some 4-D properties, she already knew that any two knots that share the same 4-D space also share sliceness — they’re either both slice or both not slice. Since her goal was to prove that the Conway knot wasn’t slice, her first step was come up with an entirely different knot with the same four-dimensional space, she explains. “Then I’ll try to show that the other knot isn’t slice.” > She spent spare time over the next several days hand-sketching and manipulating configurations of the 4-D space occupied by the Conway knot. “I didn’t allow myself to work on it during the day,” she told Quanta Magazine earlier this year, “because I didn’t consider it to be real math. I thought it was, like, my homework.” > The next step was to try to prove that the knot she drew was not slice. “There are lots of tools already in the literature for doing that,” she says. She would feed the knot iterations into a computer, “and based on the data of the knot, maybe based on how its crossings look or other data that you can pull from the knot, the algorithm spits out an integer.” In less than a week, Piccirillo had created a knot that hit the sweet spot: It had the same 4-D properties as the Conway knot, and it was found by the algorithm to be not slice. > She had suddenly succeeded where countless mathematicians had failed for five decades. She had solved the Conway knot problem.
merricksb 6y ago
Discussed 3 months ago: https://news.ycombinator.com/item?id=23236599 https://news.ycombinator.com/item?id=23236599
NonEUCitizen 6y ago
Boston Globe article was behind paywall for me, but was able to access these other articles: https://www.quantamagazine.org/graduate-student-solves-decades-old-conway-knot-problem-20200519/ https://www.quantamagazine.org/graduate-student-solves-decad... https://www.smithsonianmag.com/smart-news/graduate-student-untangles-decades-old-math-problem-180974978/ https://www.smithsonianmag.com/smart-news/graduate-student-u...

23 points by tysone 6y ago

"The principle of generating small amounts of finite improbability by simply hooking the logic circuits of a Bambleweeny 57 Sub-Meson Brain to an atomic vector plotter suspended in a strong Brownian Motion producer (say a nice hot cup of tea) were well understood. It is said, by the Guide, that such generators were often used to break the ice at parties by making all the molecules in the hostess's undergarments leap simultaneously one foot to the left, in accordance with the theory of indeterminacy. Many respectable physicists said that they weren't going to stand for this, partly because it was a debasement of science, but mostly because they didn't get invited to those sorts of parties. The physicists encountered repeated failures while trying to construct a machine which could generate the infinite improbability field needed to flip a spaceship across the mind-paralyzing distances between the farthest stars. They eventually announced that such a machine was virtually impossible. Then, one day, a student who had been left to sweep up after a particularly unsuccessful party found himself reasoning in this way: If he thought to himself, such a machine is a virtual impossibility, it must have finite improbability. So all I have to do in order to make one is to work out how exactly improbable it is, feed that figure into the finite improbability generator, give it a fresh cup of really hot tea... and turn it on! He did this and managed to create the long sought after golden Infinite Improbability generator out of thin air. Unfortunately, after he was awarded the Galactic Institute's Prize for Extreme Cleverness he was lynched by a rampaging mob of respectable physicists who couldn't stand him being "a smart arse."

deleted 6y ago
[deleted]

eganist 6y ago

They buried the how extremely deep in the article. Fished it out for y'all. > The day after hearing about the Conway knot problem, Piccirillo, then 27, sat down at her desk and began looking for a solution. Because much of her graduate work involved building pairs of knots that were different but shared some 4-D properties, she already knew that any two knots that share the same 4-D space also share sliceness — they’re either both slice or both not slice. Since her goal was to prove that the Conway knot wasn’t slice, her first step was come up with an entirely different knot with the same four-dimensional space, she explains. “Then I’ll try to show that the other knot isn’t slice.” > She spent spare time over the next several days hand-sketching and manipulating configurations of the 4-D space occupied by the Conway knot. “I didn’t allow myself to work on it during the day,” she told Quanta Magazine earlier this year, “because I didn’t consider it to be real math. I thought it was, like, my homework.” > The next step was to try to prove that the knot she drew was not slice. “There are lots of tools already in the literature for doing that,” she says. She would feed the knot iterations into a computer, “and based on the data of the knot, maybe based on how its crossings look or other data that you can pull from the knot, the algorithm spits out an integer.” In less than a week, Piccirillo had created a knot that hit the sweet spot: It had the same 4-D properties as the Conway knot, and it was found by the algorithm to be not slice. > She had suddenly succeeded where countless mathematicians had failed for five decades. She had solved the Conway knot problem.

merricksb 6y ago

Discussed 3 months ago: https://news.ycombinator.com/item?id=23236599 https://news.ycombinator.com/item?id=23236599

NonEUCitizen 6y ago

Boston Globe article was behind paywall for me, but was able to access these other articles: https://www.quantamagazine.org/graduate-student-solves-decades-old-conway-knot-problem-20200519/ https://www.quantamagazine.org/graduate-student-solves-decad... https://www.smithsonianmag.com/smart-news/graduate-student-untangles-decades-old-math-problem-180974978/ https://www.smithsonianmag.com/smart-news/graduate-student-u...