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Search: Posts Made By: Dr Sardonicus
Forum: Soap Box 2022-09-29, 18:49
Replies: 63
Views: 14,859
Posted By Dr Sardonicus
At least, by law officers. For all I know, her...

At least, by law officers. For all I know, her father could have shot her.

One thing - she was reported to have been wearing body armor and a tactical helmet. That indicates to me that she was a...
Forum: Soap Box 2022-09-29, 13:38
Replies: 412
Views: 22,210
Posted By Dr Sardonicus
On September 26, the Nord Stream 1 and 2 gas...

On September 26, the Nord Stream 1 and 2 gas pipelines suddenly developed huge leaks in at least 3 places, following what seismic data indicated were explosions similar to those produced by...
Forum: Soap Box 2022-09-29, 00:35
Replies: 222
Views: 44,233
Posted By Dr Sardonicus
FWIW I don't take seriously the notion that a...

FWIW I don't take seriously the notion that a nuclear war would create a neutrino flux anywhere near the magnitude of the flux from a "too close" supernova.
Forum: Soap Box 2022-09-29, 00:13
Replies: 222
Views: 44,233
Posted By Dr Sardonicus
"I have new data which may help explain the radio...

"I have new data which may help explain the radio silence, Sir."

"New data? Where from?"

"Our neutrino detector, Sir."

"What does the data indicate?"

"Uh, not good news, Sir. So far we...
Forum: Science & Technology 2022-09-28, 20:04
Replies: 61
Views: 8,045
Posted By Dr Sardonicus
Today (28 September 2022), I got a bivalent...

Today (28 September 2022), I got a bivalent Moderna booster and a quadrivalent flu vaccine.

As a bonus, I also got a new COVID-19 Vaccination Record card, because my first card was full.

I...
Forum: Soap Box 2022-09-27, 23:27
Replies: 222
Views: 44,233
Posted By Dr Sardonicus
Could you get a signal through?[/QUOTE]In the...

Could you get a signal through?[/QUOTE]In the context of communicating with ballistic missile submarines, it depends on the signal. If the signal happened to be the launch order, my guess would be...
Forum: Soap Box 2022-09-27, 13:16
Replies: 222
Views: 44,233
Posted By Dr Sardonicus
A new generation of an old propellor-driven...

A new generation of an old propellor-driven workhorse, the C-130J-30 (Hercules Transport), is currently being fitted out with a VLF communications system. The C-130 is nominally a cargo plane which...
Forum: Soap Box 2022-09-27, 00:45
Replies: 17
Views: 1,225
Posted By Dr Sardonicus
I am reminded of a skit done by a comedy show...

I am reminded of a skit done by a comedy show called IIRC "Spitting Image" which used puppets in its satirical skits. One of these had the (IIRC) Chancellor of the Exchequer Nigel Calton on the hot...
Forum: Tales From the Crypt(o) 2022-09-26, 14:16
Replies: 304
Views: 119,894
Posted By Dr Sardonicus
Hmm, there's an NSF grant involved for an...

Hmm, there's an NSF grant involved for an Internet Observatory project. Award #2131929, David Lazer (Principal Investigator) and David Choffnes (Co-Principal Investigator) have $5.2 million of a...
Forum: Soap Box 2022-09-26, 13:32
Replies: 412
Views: 22,210
Posted By Dr Sardonicus
[/QUOTE]Thank you for posting that link! I have,...

[/QUOTE]Thank you for posting that link! I have, from time to time, tried to memorize that poem. I have a goodly portion of it solid, but not all yet. Having a handy link in addition to a copy of...
Forum: Soap Box 2022-09-25, 13:12
Replies: 412
Views: 22,210
Posted By Dr Sardonicus
I thought Uncle Vlad had already persuaded those...

I thought Uncle Vlad had already persuaded those folks to travel and see the world.

Now it seems a lot of would-be conscripts are similarly persuaded.

Unfortunately, many have had to leave with...
Forum: Number Theory Discussion Group 2022-09-25, 00:50
Replies: 12
Views: 1,467
Posted By Dr Sardonicus
It appears you are trying to solve R[a;b] =...

It appears you are trying to solve

R[a;b] = [c;d]

where

R = [x,y;-y,x].

Writing as a system of linear equations,
Forum: jzakiya 2022-09-25, 00:18
Replies: 111
Views: 26,617
Posted By Dr Sardonicus
I've been very reluctant to even respond to these...

I've been very reluctant to even respond to these type of ad hominem statements,[/QUOTE]No. Saying you have no proof is not an "ad hominem statement."

This sort of false accusation is...
Forum: enzocreti 2022-09-23, 17:39
Replies: 2
Views: 106
Posted By Dr Sardonicus
A little algebra may help: 1666667 = (10^7 +...

A little algebra may help:

1666667 = (10^7 + 2)/6

666667 = (2*10^6 +1)/3

2*(10^7 + 2)/6 = (10^7 + 2)/3

(10^7 + 2)/3 = 5*(2*10^6 + 1)/3 - 1
Forum: Proth Prime Search 2022-09-23, 12:21
Replies: 73
Views: 2,209
Posted By Dr Sardonicus
Viewing can make you dumber. We...

Viewing can make you dumber. We agree.[/QUOTE]That's good enough for me.
Forum: Proth Prime Search 2022-09-22, 12:27
Replies: 73
Views: 2,209
Posted By Dr Sardonicus
(my emphasis)

(my emphasis)
Forum: Proth Prime Search 2022-09-21, 13:36
Replies: 73
Views: 2,209
Posted By Dr Sardonicus
Not at all. Let p be a prime number, and let N =...

Not at all. Let p be a prime number, and let N = 2^p - 1.

Then 2^(N-1) == 1 (mod N) [and 2^((N-1)/2) == 1 (mod N) also].

So N "passes" Fermat and Miller-Rabin to the base 2.

So far, only 51...
Forum: Soap Box 2022-09-21, 12:43
Replies: 412
Views: 22,210
Posted By Dr Sardonicus
Calling up 300,000 reservists seven months into...

Calling up 300,000 reservists seven months into the "special military operation" was always part of the plan, of course. Everything's going just fine.

Sounds like sham Anschluss referenda will be...
Forum: Proth Prime Search 2022-09-20, 12:15
Replies: 73
Views: 2,209
Posted By Dr Sardonicus
To the OP: Follow the guidelines in Uncwilly's...

To the OP: Follow the guidelines in Uncwilly's post, link provided for ease of reference. Some of the guidelines you have violated in this thread are quoted below.

Continued violation of...
Forum: Number Theory Discussion Group 2022-09-19, 21:56
Replies: 12
Views: 1,467
Posted By Dr Sardonicus
No, sir. If M is a 2x2 matrix, scalar...

No, sir. If M is a 2x2 matrix, scalar multiplication of M by k produces a matrix with determinant k^2*det(M). Thus, if M is a nonsingular 2x2 matrix, det((1/det(M))M) is 1/det(M).

If M is 2x2...
Forum: Number Theory Discussion Group 2022-09-19, 16:00
Replies: 3
Views: 213
Posted By Dr Sardonicus
:goodposting: Smallest value confirmed. ...

:goodposting:

Smallest value confirmed.

I had Pari-GP find all the liars using CRT as indicated, and also all the plus-or-minus-powers-of-two liars. A bit of abracadabra with sets gave me a...
Forum: Number Theory Discussion Group 2022-09-17, 22:14
Replies: 12
Views: 1,467
Posted By Dr Sardonicus
A rotation matrix has determinant 1 by...

A rotation matrix has determinant 1 by definition, so M1 and M2 are not rotation matrices.

If p is an odd prime, we have seen that if p == 3 (mod 4) there are p+1 rotation matrices (mod p), and if...
Forum: enzocreti 2022-09-15, 13:49
Replies: 1
Views: 261
Posted By Dr Sardonicus
If a congruence holds (mod n), it holds (mod d)...

If a congruence holds (mod n), it holds (mod d) for every divisor d of n. In particular, in the case at hand, as you more or less pointed out in this post...
Forum: Proth Prime Search 2022-09-15, 13:20
Replies: 73
Views: 2,209
Posted By Dr Sardonicus
Please explain the warning about input3.txt ...

Please explain the warning about input3.txt

FWIW I verified that n "passes" the Fermat PRP tests to base 2 and base 14.

When n tests as a Fermat PRP but as composite by Miller-Rabin to the same...
Forum: Lounge 2022-09-14, 13:12
Replies: 13
Views: 442
Posted By Dr Sardonicus
In addition to the perils of mushroom...

In addition to the perils of mushroom misidentification, toxins from fungi (mycotoxins) can be ingested from contaminated food.

One type of such poisoning is called ergotism, or "St. Anthony's...
Showing results 1 to 25 of 1000

 
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