Free Republic
Browse · Search
General/Chat
Topics · Post Article

Skip to comments.

Graduate Student Solves Decades-Old Conway Knot Problem
Quanta Magazine ^ | 21 May 2020 | Ian MacLellan

Posted on 05/22/2020 2:44:42 PM PDT by DUMBGRUNT

click here to read article


Navigation: use the links below to view more comments.
first previous 1-2021-4041-6061-8081-90 last
To: HandyDandy

I prefer what Ernest Rutherford said,

“If you can’t explain your physics to a barmaid it is probably not very good physics.”

He must have hung a lot at the local pub!


81 posted on 05/23/2020 4:01:19 PM PDT by Reily
[ Post Reply | Private Reply | To 80 | View Replies]

To: Hot Tabasco

No day job left bro so comedy is my specialty........

–that 10,000 hours of practice can turn anyone into an expert–probably isn’t true, a new study says...

Perhaps you could collect deposit bottles/cans and run them to the high paying states?

I haven’t noticed any on FR but many other sites have many offers of high paying jobs, no work required!

Just a few clicks away.


82 posted on 05/23/2020 4:07:53 PM PDT by DUMBGRUNT
[ Post Reply | Private Reply | To 79 | View Replies]

To: DUMBGRUNT
Einstein wrote that he didn’t see the “trick” until he had already calculated the answer...

That happened to me as well . I got 2d=60(d/30 +t2) Where t2 is the time of the return and d=the distance traveled one way. That works out to t2=0 . That is when I saw the trick! When you know the math necessary to plow through a problem you usually just work through it mathematically until you've come up with an answer. It's almost an automatic process.

83 posted on 05/23/2020 4:35:00 PM PDT by Nateman (If the left is not screaming, you are doing it wrong.)
[ Post Reply | Private Reply | To 76 | View Replies]

To: DUMBGRUNT

Actually, you left a hole in your statement of the problem.

The Einstein version explicitly specifies 1 mile up and 1 mile back. Your version does not specify the length of the route, and does not specify that the return trip is the same distance. So I could take the direct route getting there at 30 mph, and a much longer alternate route getting back, which would allow me an average speed of 60mph


84 posted on 05/23/2020 4:40:38 PM PDT by PapaBear3625 ("Those who can make you believe absurdities, can make you commit atrocities." -- Voltaire)
[ Post Reply | Private Reply | To 76 | View Replies]

To: DUMBGRUNT
Just a few clicks away.

Not interested.....After all, I have my own lone idiot audience........Don't forget to tip the waitress......LOL!

85 posted on 05/23/2020 4:45:56 PM PDT by Hot Tabasco
[ Post Reply | Private Reply | To 82 | View Replies]

To: Retrofitted
"Infinity. The answer is always infinity. Unless it’s a cat thing. ;)"

I think your right... It's like the old frog in the hole problem.. :)

86 posted on 05/23/2020 4:53:54 PM PDT by unread (A REPUBLIC..! if you can keep it....)
[ Post Reply | Private Reply | To 6 | View Replies]

To: Reily
Rutherford obviously was never served by barkeep AOC!


87 posted on 05/23/2020 5:19:26 PM PDT by ProtectOurFreedom
[ Post Reply | Private Reply | To 81 | View Replies]

To: ProtectOurFreedom

Well she was probably not a very good barmaid!


88 posted on 05/23/2020 5:22:34 PM PDT by Reily
[ Post Reply | Private Reply | To 87 | View Replies]

To: DUMBGRUNT
Well, cars from 1934 are pretty old.

Even more so if considered old back then when the question was given in '34.

89 posted on 05/23/2020 8:56:30 PM PDT by Deaf Smith (When a Texan takes his chances, chances will be taken th sprayat's fore<p> sure)
[ Post Reply | Private Reply | To 76 | View Replies]

To: AdmSmith; AnonymousConservative; Arthur Wildfire! March; Berosus; Bockscar; cardinal4; ColdOne; ...
The Oldest Man: The Doctor from The Carol Burnett Show (full sketch)

90 posted on 05/24/2020 1:30:20 PM PDT by SunkenCiv (Imagine an imaginary menagerie manager imagining managing an imaginary menagerie.)
[ Post Reply | Private Reply | View Replies]


Navigation: use the links below to view more comments.
first previous 1-2021-4041-6061-8081-90 last

Disclaimer: Opinions posted on Free Republic are those of the individual posters and do not necessarily represent the opinion of Free Republic or its management. All materials posted herein are protected by copyright law and the exemption for fair use of copyrighted works.

Free Republic
Browse · Search
General/Chat
Topics · Post Article

FreeRepublic, LLC, PO BOX 9771, FRESNO, CA 93794
FreeRepublic.com is powered by software copyright 2000-2008 John Robinson