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Search: Posts Made By: xilman
Forum: Homework Help 2021-04-19, 11:19
Replies: 8
Views: 135
Posted By xilman
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
Posted By xilman
Quos Deus vult perdere, prius dementat.

Quos Deus vult perdere, prius dementat.
Forum: Science & Technology 2021-04-16, 20:16
Replies: 53
Views: 10,981
Posted By xilman
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
RIP
Views: 150,284
Posted By xilman
Helen McCrory: Peaky Blinders actress dies aged...

Helen McCrory: Peaky Blinders actress dies aged 52, husband Damian Lewis says
Helen McCrory (https://www.bbc.co.uk/news/entertainment-arts-56770593)
Forum: Lounge 2021-04-14, 16:15
Replies: 1,710
RIP
Views: 150,284
Posted By xilman
Rule of thumb: if the promised returns from an...

Rule of thumb: if the promised returns from an investment sound too good to be true, they probably are.

I've relatively little sympathy for the old and greedy.
Forum: Science & Technology 2021-04-13, 15:36
Replies: 53
Views: 10,981
Posted By xilman
Locusts make good human food too. I speak...

Locusts make good human food too.

I speak from experience.
Forum: jwaltos 2021-04-12, 17:57
Replies: 6
Views: 222
Posted By xilman
I strongly recommend that you do read it.

I strongly recommend that you do read it.
Forum: Homework Help 2021-04-12, 10:30
Replies: 20
Views: 881
Posted By xilman
I realise that is profoundly misleading, not to...

I realise that is profoundly misleading, not to say wrong.

37# is certainly >7.4 billion, and so on, but the procedure outlined work only to 41^2-1 = 1680 as a primality test. It filters out 85%...
Forum: Homework Help 2021-04-11, 19:18
Replies: 20
Views: 881
Posted By xilman
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
Posted By xilman
Quantum tunnelling? ...

Quantum tunnelling?


https://en.wikipedia.org/wiki/Quantum_tunnelling#Faster_than_light
Forum: Science & Technology 2021-04-11, 12:56
Replies: 53
Views: 10,981
Posted By xilman
Exactly what I did. Hit reply instead of edit.

Exactly what I did. Hit reply instead of edit.
Forum: Science & Technology 2021-04-11, 07:57
Replies: 53
Views: 10,981
Posted By xilman
True. The real reason is that I hit reply,...

True.

The real reason is that I hit reply, not edit.
Forum: Science & Technology 2021-04-10, 18:52
Replies: 53
Views: 10,981
Posted By xilman
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
Posted By xilman
Were you there back in 1979?

Were you there back in 1979?
Forum: Science & Technology 2021-04-10, 17:23
Replies: 2,886
Views: 217,381
Posted By xilman
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
RIP
Views: 150,284
Posted By xilman
Phil the Greek

https://www.bbc.co.uk/news/uk-11437314
Forum: Tales From the Crypt(o) 2021-04-05, 15:07
Replies: 280
Views: 67,536
Posted By xilman
Long before the invention of radio and...

Long before the invention of radio and television, people were writing autobiographies.
Forum: Science & Technology 2021-04-05, 15:06
Replies: 190
Views: 9,403
Posted By xilman
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
Posted By xilman
Released it how and where? Hard to give...

Released it how and where?

Hard to give feedback without access to it.
Forum: Soap Box 2021-04-05, 11:51
Replies: 46
Views: 1,137
Posted By xilman
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
Posted By xilman
Remember: two wrongs do not make a right. ...

Remember: two wrongs do not make a right.

Three lefts do.
Forum: Factoring 2021-04-01, 19:19
Replies: 18
Views: 521
Posted By xilman
Almost all computers these days come with enough...

Almost all computers these days come with enough storage to allow you to dual boot.

If you want to spend money on a Windoze license, repartition and dual boot.

That's how my current laptop is...
Forum: XYYXF Project 2021-04-01, 19:15
Replies: 16
Views: 2,251
Posted By xilman
Nice work!

Nice work!
Forum: Factoring 2021-04-01, 19:13
Replies: 3
Views: 285
Posted By xilman
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
Posted By xilman
In my view napalm has a pleasant enough smell but...

In my view napalm has a pleasant enough smell but nothing over which to eulogise.

That said, the smell of commercial napalm may be far better than that of the home-brew which I have made to light...
Showing results 1 to 25 of 1000

 
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