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Forum: Analysis & Analytic Number Theory 2020-10-11, 18:11
Replies: 8
Views: 617
Posted By Till
For completeness I'ld like to add that it's more...

For completeness I'ld like to add that it's more than counting.

For any n>2, we can obtain the values of A004215 (natural numbers representable by 4 squares but no less) < 2^n from the set of...
Forum: Analysis & Analytic Number Theory 2020-09-21, 16:27
Replies: 8
Views: 617
Posted By Till
In my opinion, any cross-reference in OEIS is a...

In my opinion, any cross-reference in OEIS is a big help.
Forum: Analysis & Analytic Number Theory 2020-09-21, 14:44
Replies: 8
Views: 617
Posted By Till
Thanks for your analysis. I submitted the...

Thanks for your analysis. I submitted the conjecture to OEIS.
Forum: Analysis & Analytic Number Theory 2020-09-20, 16:38
Replies: 8
Views: 617
Posted By Till
Sorry, I made a little mistake: It is...

Sorry, I made a little mistake: It is http://oeis.org/A004215, not A004015...
Forum: Analysis & Analytic Number Theory 2020-09-20, 12:23
Replies: 8
Views: 617
Posted By Till
Quadratic residue counts related to four squares representation counts

Hi all,
today I found something curious...

Let X(m) be the number of distinct quadratic residues mod m. (A023105 for m=2^n)
Let Y(m) be the number of n < m that can be expressed as a sum of 4...
Forum: Puzzles 2020-09-03, 15:41
Replies: 33
Views: 2,866
Posted By Till
I see... Compare that to...

I see... Compare that to http://www.research.ibm.com/haifa/ponderthis/challenges/September2020.html


Just wondering how long it takes...
Forum: Puzzles 2020-09-03, 15:12
Replies: 33
Views: 2,866
Posted By Till
Guys, you are worrying me... Shouldn't the...

Guys, you are worrying me...
Shouldn't the permutation (0 2) lead to the rules

2 -> 0
1 -> 1
0 -> 2
instead of

2 -> 1
1 -> 0
Forum: Puzzles 2020-08-31, 14:20
Replies: 33
Views: 2,866
Posted By Till
The challenge description is buggy, or not?

The challenge description is buggy, or not?
Forum: Miscellaneous Math 2020-08-27, 16:56
Replies: 57
Views: 3,968
Posted By Till
Yes, one should not name stuff after himself. ...

Yes, one should not name stuff after himself.
You should have one or two friends that do that for you :razz::razz:

Apart from that: I didn't look at the paper but the implementation I got looks...
Forum: Miscellaneous Math 2020-08-26, 19:10
Replies: 57
Views: 3,968
Posted By Till
I have been provided with a Java implementation...

I have been provided with a Java implementation of this sieve a couple of months ago. You can find it here:...
Forum: Lounge 2020-08-25, 17:52
Replies: 82
Views: 3,535
Posted By Till
Just noticed that I have such numbers, too. Not...

Just noticed that I have such numbers, too. Not too impressive ones, though: Erdös=5 and Dijkstra=6. But hey, better than nothin' :smile:
https://www.csauthors.net/tilman-neumann/
Forum: Factoring 2020-08-22, 15:57
Replies: 3
Views: 898
Posted By Till
Apart from the 2- (or even 3-) large primes...

Apart from the 2- (or even 3-) large primes variant and the small primes variant I would like to mention:

1. It should be SIQS
2. Knuth-Schroeppel multiplier
3. Block-Lancos or Block-Wiedemann...
Forum: Lounge 2020-08-19, 15:21
Replies: 17
Views: 1,307
Posted By Till
German "Karacho" (speed, velocity) stems from...

German "Karacho" (speed, velocity) stems from spanish "carajo" (dick).


I wonder if Juan Manuel Fangio had some influence to form that word ;-)
Forum: Lounge 2020-08-13, 19:45
Replies: 1,124
Views: 53,525
Posted By Till
Yesterday, the UK took around 5000 death from its...

Yesterday, the UK took around 5000 death from its COVID death toll list...



From https://www.worldometers.info/coronavirus/country/uk/


1,009 new cases and 20 new deaths in the United...
Forum: Lounge 2020-08-13, 19:35
Replies: 14
Views: 1,471
Posted By Till
Yeah, selling their data would be the most...

Yeah, selling their data would be the most logical thing.
I see that now they have a "contact" option: https://www.worldometers.info/contact/
This has not been the case when I created this thread....
Forum: Miscellaneous Math 2020-08-12, 21:09
Replies: 32
Views: 2,016
Posted By Till
Yep :-/ Thanks for the...

Yep :-/





Thanks for the explanation. There is so much to learn...
Forum: Miscellaneous Math 2020-08-11, 20:59
Replies: 32
Views: 2,016
Posted By Till
Uh I think I got the last bit... "de" vs. "bi" is...

Uh I think I got the last bit... "de" vs. "bi" is the pun?
Forum: Miscellaneous Math 2020-08-11, 19:53
Replies: 32
Views: 2,016
Posted By Till
I understood that much... Good night :cool:

I understood that much... Good night :cool:
Forum: Miscellaneous Math 2020-08-11, 17:45
Replies: 32
Views: 2,016
Posted By Till
Is this a riddle that someone could crack who...

Is this a riddle that someone could crack who does not know british language or culture to a really large extend? I am quite clueless about it, but I think that those two capitalized letters are a...
Forum: Miscellaneous Math 2020-08-11, 17:05
Replies: 32
Views: 2,016
Posted By Till
Thank you sir :smile:

Thank you sir :smile:
Forum: Miscellaneous Math 2020-08-11, 16:46
Replies: 32
Views: 2,016
Posted By Till
Great one :razz: :grin::grin:

Great one :razz: :grin::grin:
Forum: Miscellaneous Math 2020-08-11, 16:16
Replies: 32
Views: 2,016
Posted By Till
Actually, the Sourceforge project link does not...

Actually, the Sourceforge project link does not seem to be the problem, it is rather the download link which appends "files/latest/download" to the project link.

But if I understand correctly,...
Forum: Miscellaneous Math 2020-08-11, 15:22
Replies: 32
Views: 2,016
Posted By Till
SourceForge says "Malware detected. Download at...

SourceForge says "Malware detected. Download at own risk."


Somebody here with a virtual machine at hand including virus and malware scanner wants to try to open it?
Forum: Lounge 2020-08-07, 17:02
Replies: 221
Views: 11,184
Posted By Till
Fascinating article!

Fascinating article!
Forum: Lounge 2020-07-28, 17:28
Replies: 164
Views: 13,413
Posted By Till
Good one...

Good one...
Showing results 1 to 25 of 417

 
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