mersenneforum.org  

Go Back   mersenneforum.org > Search Forums

Showing results 1 to 25 of 1000
Search took 0.25 seconds.
Search: Posts Made By: Dr Sardonicus
Forum: Soap Box 2021-02-28, 00:34
Replies: 17
Views: 353
Posted By Dr Sardonicus
No legal prohibition to a convicted felon...

No legal prohibition to a convicted felon becoming US president AFAIK. IIRC the now late Lyndon Larouche ran for president while incarcerated as a convicted felon (but did not come anywhere close to...
Forum: Lounge 2021-02-28, 00:17
Replies: 1,319
Views: 96,588
Posted By Dr Sardonicus
J&J’s 1-dose shot cleared, giving US 3rd COVID-19...

J&J’s 1-dose shot cleared, giving US 3rd COVID-19 vaccine (https://apnews.com/article/ap-top-news-anthony-fauci-coronavirus-pandemic-f13611719ad8d1655ed7b354af75a9a9)
Forum: Lounge 2021-02-27, 16:17
Replies: 195
Views: 27,230
Posted By Dr Sardonicus
They look like either Common Grackles, or...

They look like either Common Grackles, or possibly some other kind of blackbird. Brewer's Blackbirds and Rusty Blackbirds are not entirely ruled out by coloration, due to unfavorable light...
Forum: Soap Box 2021-02-27, 13:49
Replies: 17
Views: 353
Posted By Dr Sardonicus
This is from a recent AP story about the CPAC...

This is from a recent AP story about the CPAC shindig (https://apnews.com/article/donald-trump-ted-cruz-elections-c5273f2cf5e1c478dd0d9b11b902bdf9).

Never mind the election, let's make him an...
Forum: Reading 2021-02-26, 13:26
Replies: 15
Views: 2,739
Posted By Dr Sardonicus
I tried to find out how much power a slug of...

I tried to find out how much power a slug of corium produces, without much success. I read that a lot of the heat is produced by the radioactive decay of short-lived isotopes. When the stuff hits...
Forum: Lounge 2021-02-26, 12:13
Replies: 56
Views: 9,333
Posted By Dr Sardonicus
Monarch butterflies down 26% in Mexico wintering...

Monarch butterflies down 26% in Mexico wintering grounds (https://apnews.com/article/monarch-butterflies-down-mexico-9eb0e1e1b09e289428e55f78b3236c4b)
Forum: Miscellaneous Math 2021-02-24, 17:19
Replies: 2
Views: 146
Posted By Dr Sardonicus
The Lucas identity follows immediately from (x^3...

The Lucas identity follows immediately from (x^3 + y^3)/(x + y) = x^2 - x*y + y^2.

The Fibonacci identity follows immediately from (x^3 - y^3)/(x - y) = x^2 + x*y + y^2.

Clearly the same...
Forum: Reading 2021-02-24, 16:32
Replies: 15
Views: 2,739
Posted By Dr Sardonicus
I have to wonder at the multi-megaton estimate of...

I have to wonder at the multi-megaton estimate of the steam explosion that would have resulted if the slug of radioactive core material had hit the full tanks of water. I just don't think it would...
Forum: Soap Box 2021-02-24, 14:07
Replies: 17
Views: 353
Posted By Dr Sardonicus
It's quite simple, really. The election is over,...

It's quite simple, really. The election is over, the winners have taken office, and with the Supreme Court's latest decisions, the last (AFAIK) pending legal disputes of the results have been...
Forum: Soap Box 2021-02-24, 01:47
Replies: 684
Views: 52,084
Posted By Dr Sardonicus
I invite all and sundry to view the title of my...

I invite all and sundry to view the title of my 2021-02-23, 21:04 post to this thread, whose topic was the 2020 US general election. I thought the news item marked a fitting end to the subject. I...
Forum: Lounge 2021-02-23, 23:02
Replies: 1,072
Views: 68,822
Posted By Dr Sardonicus
It seems that systems engineer Ian Clark used the...

It seems that systems engineer Ian Clark used the pattern of red and white in the rover's parachute to encode a message and the location of JPL...
Forum: Soap Box 2021-02-23, 21:04
Replies: 684
Views: 52,084
Posted By Dr Sardonicus
And so it ends...

Supreme Court rejects Trump election challenge cases (https://apnews.com/article/joe-biden-donald-trump-pennsylvania-elections-us-supreme-court-5cc6aee8c328c7bb1d423244b979bcec)
Forum: Miscellaneous Math 2021-02-23, 15:18
Replies: 32
Views: 1,342
Posted By Dr Sardonicus
Heh-heh. This means that each of the 25 primes...

Heh-heh. This means that each of the 25 primes less than 100 is a quadratic residue (mod p) and (mod q). We know that the smaller factor (say p) is less than 10^50 which is about 2^166. There are...
Forum: Miscellaneous Math 2021-02-22, 21:52
Replies: 10
Views: 320
Posted By Dr Sardonicus
MODERATOR NOTE: Thread closed.

MODERATOR NOTE: Thread closed.
Forum: Soap Box 2021-02-22, 15:05
Replies: 9
Views: 352
Posted By Dr Sardonicus
I am reminded of a long-ago next door neighbor...

I am reminded of a long-ago next door neighbor of mine who had come from Texas. Not a bad guy by any stretch, and if there were a Sweetest Gal on God's Green Earth contest his wife would have been...
Forum: Lounge 2021-02-21, 21:31
Replies: 43
Views: 1,807
Posted By Dr Sardonicus
One of the two engines on a 777 went blooey just...

One of the two engines on a 777 went blooey just after takeoff. The flight crew landed the plane safely on the remaining engine.

Nobody on the plane was injured.

Well done!

I have not...
Forum: Soap Box 2021-02-21, 21:20
Replies: 9
Views: 352
Posted By Dr Sardonicus
At this point Senator Cruz could probably help...

At this point Senator Cruz could probably help the most by keeping his mouth shut and lying low. Or perhaps he could try to drum up some donations.

After Texas voted for #45 in the 2020 election,...
Forum: Soap Box 2021-02-21, 17:28
Replies: 9
Views: 352
Posted By Dr Sardonicus
Texas is already getting "donations" from...

Texas is already getting "donations" from taxpayers of all 50 States, thanks to President Biden signing a Major Disaster Declaration for a large part of Texas.

Yes, "LET THE YANKEES FREEZE IN THE...
Forum: Science & Technology 2021-02-20, 16:50
Replies: 79
Views: 6,104
Posted By Dr Sardonicus
In Texas, the frost line runs from about 2 feet...

In Texas, the frost line runs from about 2 feet down in the north to less than 6 inches in the south. They bury the mains and service lines somewhat deeper of course, but sometimes the freeze makes...
Forum: Science & Technology 2021-02-20, 15:09
Replies: 79
Views: 6,104
Posted By Dr Sardonicus
This is up to the people of the Great State of...

This is up to the people of the Great State of Texas. If they're willing to live with a power system that collapses in cold spells, nothing will be done. The major difference this time around from...
Forum: Miscellaneous Math 2021-02-20, 14:35
Replies: 32
Views: 1,342
Posted By Dr Sardonicus
D'oh! Of course! So we've got a square root...

D'oh! Of course!

So we've got a square root of Mod(2, u^4 + 1) which can be re-expressed as Mod(u^3 - u, u^4 + 1)^2 = Mod(2, u^4 + 1).

Perhaps even more obvious is

Mod(x, x^2 + 1)^2 =...
Forum: Lounge 2021-02-20, 14:27
Replies: 1,677
RIP
Views: 138,268
Posted By Dr Sardonicus
He was getting pain pill scrips from several...

He was getting pain pill scrips from several different doctors, and getting all the scrips filled at the same pharmacy. I read he got 2000 Ocycontin pills over six months, which works out to a bit...
Forum: Lounge 2021-02-19, 23:53
Replies: 4,254
Views: 302,594
Posted By Dr Sardonicus
When I was a kid, my dad programmed an IBM 360...

When I was a kid, my dad programmed an IBM 360 where he worked. One time I was talking to him about I forget what, and said, "You can even check it with a computer!"

He looked at me blankly and...
Forum: Miscellaneous Math 2021-02-19, 17:53
Replies: 32
Views: 1,342
Posted By Dr Sardonicus
If I did my sums correctly, for Fermat numbers Fn...

If I did my sums correctly, for Fermat numbers Fn with n > 1,

x = (Fn- 1)/(Fn-2 - 1)*Fn-1 (mod Fn) satisfies

x^2 == 2 (mod Fn).
Forum: Miscellaneous Math 2021-02-19, 16:54
Replies: 72
Views: 2,209
Posted By Dr Sardonicus
AFAIK the greatest mathematical importance of...

AFAIK the greatest mathematical importance of Fermat's Last Theorem is that no proof was known, and efforts to find a proof greatly advanced the subject of Algebraic Number Theory

Fermat's "little...
Showing results 1 to 25 of 1000

 
All times are UTC. The time now is 11:21.

Mon Mar 1 11:21:40 UTC 2021 up 88 days, 7:32, 0 users, load averages: 1.64, 1.45, 1.35

Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2021, Jelsoft Enterprises Ltd.

This forum has received and complied with 0 (zero) government requests for information.

Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation.
A copy of the license is included in the FAQ.