Forum: Homework Help
2021-04-19, 11:19
|
|
Replies: 8
Views: 135
Now try proving it as in Russell & Whitehead's...
Now try proving it as in Russell & Whitehead's Principia Mathematica.
It took them 379+86 = 465 pages to get to the point where they proved 1+1=2. The proof was almost complete by p379 but they...
|
|
Forum: Science & Technology
2021-04-19, 11:13
|
|
Replies: 53
Views: 10,981
|
|
Forum: Science & Technology
2021-04-16, 20:16
|
|
Replies: 53
Views: 10,981
Anyone else seen this?
...
Anyone else seen this?
https://twitter.com/PlatformAdam/status/1382429933373431816/photo/1
The SO2 plume reaches the Arabian peninsular.
|
|
Forum: Lounge
2021-04-16, 17:03
|
|
Replies: 1,710
Views: 150,284
|
|
Forum: Lounge
2021-04-14, 16:15
|
|
Replies: 1,710
Views: 150,284
|
|
Forum: Science & Technology
2021-04-13, 15:36
|
|
Replies: 53
Views: 10,981
|
|
Forum: jwaltos
2021-04-12, 17:57
|
|
Replies: 6
Views: 222
|
|
Forum: Homework Help
2021-04-12, 10:30
|
|
Replies: 20
Views: 881
|
|
Forum: Homework Help
2021-04-11, 19:18
|
|
Replies: 20
Views: 881
To check for divisibility by 7, 11 and 13...
To check for divisibility by 7, 11 and 13 simultaneously use the rule-of-eleven three digits at a time and examine the result.
I quite often use this to check primality of small numbers (<30030)...
|
|
Forum: Puzzles
2021-04-11, 13:00
|
|
Replies: 5
Views: 152
|
|
Forum: Science & Technology
2021-04-11, 12:56
|
|
Replies: 53
Views: 10,981
|
|
Forum: Science & Technology
2021-04-11, 07:57
|
|
Replies: 53
Views: 10,981
|
|
Forum: Science & Technology
2021-04-10, 18:52
|
|
Replies: 53
Views: 10,981
Were you there back in 1979?
According to...
Were you there back in 1979?
According to the Beeb "Local media have also reported increased activity from Mount Pelee on the island of Martinique, north of St Vincent."
Those with a knowledge...
|
|
Forum: Science & Technology
2021-04-10, 18:49
|
|
Replies: 53
Views: 10,981
|
|
Forum: Science & Technology
2021-04-10, 17:23
|
|
Replies: 2,886
Views: 217,381
Laser cooling of anti-hydrogen...
Laser cooling of anti-hydrogen (https://physicsworld.com/a/breakthrough-in-laser-cooling-antihydrogen-could-reveal-why-matter-dominates-the-universe/)
|
|
Forum: Lounge
2021-04-09, 14:33
|
|
Replies: 1,710
Views: 150,284
|
|
Forum: Tales From the Crypt(o)
2021-04-05, 15:07
|
|
Replies: 280
Views: 67,536
|
|
Forum: Science & Technology
2021-04-05, 15:06
|
|
Replies: 190
Views: 9,403
Yup. It doesn't much matter as long as you get...
Yup. It doesn't much matter as long as you get the second within 3 months of the first.
For the avoidance of doubt: that's what the medics say and I'm just repeating it. Please don't be tempted to...
|
|
Forum: Programming
2021-04-05, 15:04
|
|
Replies: 2
Views: 205
|
|
Forum: Soap Box
2021-04-05, 11:51
|
|
Replies: 46
Views: 1,137
Wrong.
The first gold and silver coins were...
Wrong.
The first gold and silver coins were minted over 2500 years ago in Greece. Promissory notes date from 6th century China.
Commodity money (https://en.wikipedia.org/wiki/Commodity_money)...
|
|
Forum: PrimeNet
2021-04-03, 16:00
|
|
Replies: 11
Views: 410
|
|
Forum: Factoring
2021-04-01, 19:19
|
|
Replies: 18
Views: 521
|
|
Forum: XYYXF Project
2021-04-01, 19:15
|
|
Replies: 16
Views: 2,251
|
|
Forum: Factoring
2021-04-01, 19:13
|
|
Replies: 3
Views: 285
Trivial question to answer.
For The Codebook...
Trivial question to answer.
For The Codebook challenge back in 1999 I created a RSA modulus which could have been factored much more easily than the GNFS actually used to solve the problem.
My...
|
|
Forum: LaurV
2021-03-30, 18:27
|
|
Replies: 14
Views: 339
|
