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Forum: Miscellaneous Math 2021-05-23, 20:07
Replies: 10
Views: 269
Posted By jnml
Nothing left to be found ;-) The above can...

Nothing left to be found ;-)

The above can be directly coded, but that'll have to wait for tomorrow at least.

Thank you!
Forum: Miscellaneous Math 2021-05-23, 19:54
Replies: 10
Views: 269
Posted By jnml
In case anyone is curious about the linear...

In case anyone is curious about the linear multiply algorithm, base of the previous version
of the Sqr implementation, I just added Mul in...
Forum: Miscellaneous Math 2021-05-23, 14:44
Replies: 10
Views: 269
Posted By jnml
Fixed in...

Fixed in https://gitlab.com/cznic/mathutil/-/commit/cc711c58e06ee90a8e4f6274d036ebcb72228db8, thanks again.
Forum: Miscellaneous Math 2021-05-23, 13:54
Replies: 10
Views: 269
Posted By jnml
It is not because I was not aware of this simpler...

It is not because I was not aware of this simpler solution in O(1) ;-)

The idea implemented in the linked code is about multiplying repdigits in linear time.
Squaring a Mersenne number (a...
Forum: Miscellaneous Math 2021-05-23, 13:29
Replies: 10
Views: 269
Posted By jnml
It does not. I think that with this identity it...

It does not. I think that with this identity it will no more work in linear time.
Forum: Miscellaneous Math 2021-05-23, 12:58
Replies: 10
Views: 269
Posted By jnml
Mersenne numbers can be squared in O(n)

I wanted to look at squares of Mersenne numbers.
Probably just reinventing the wheel, sharing it anyway.

tl/dr: Outperfoms big mul for Mersenne numbers > 64k bits.

Code (Go):...
Forum: Math 2021-04-15, 06:33
Replies: 10
Views: 6,558
Posted By jnml
"Size" is not well defined in this context....

"Size" is not well defined in this context. "Number of decimal" digits is, for example.

From a programmer's POV, I'd assume "size" to mean how much memory one needs
to store the number in a...
Forum: Miscellaneous Math 2021-03-20, 08:08
Replies: 58
Views: 1,823
Posted By jnml
:popcorn:

:popcorn:
Forum: FactorDB 2020-12-20, 10:18
Replies: 163
Views: 45,969
Posted By jnml
I don't follow. Linux program does not need any...

I don't follow. Linux program does not need any update to run on Windows nowadays,
IINM.

It's probably Windows that need to be updated to have WSL, if that's not the default.
Forum: FactorDB 2020-12-20, 08:29
Replies: 163
Views: 45,969
Posted By jnml
I'm not a Windows user, but I was under the...

I'm not a Windows user, but I was under the impression that nowadays Windows can run
any Linux binary.
Forum: GPU Computing 2020-12-19, 19:30
Replies: 27
Views: 2,836
Posted By jnml
My choice is Devuan (https://www.devuan.org/) for...

My choice is Devuan (https://www.devuan.org/) for the last year or so. Both at home and work.

It's systemd free, snap free and for some people that matters. Otherwise it's Debian based,
ie. the...
Forum: Math 2020-12-16, 10:29
Replies: 16
Views: 1,686
Posted By jnml
Please don't overreact. AFAICS, LaurV's comment...

Please don't overreact. AFAICS, LaurV's comment talked about no _person_ at all and
I believe having opinions about _ideas_ is always fine.
Forum: Miscellaneous Math 2020-12-10, 05:41
Replies: 20
Views: 2,234
Posted By jnml
Please quote those rules or provide a link. Never...

Please quote those rules or provide a link. Never heard this before, genuinely want to learn
about them. Thanks.

(Searched the forum, failed to find it.)
Forum: Miscellaneous Math 2020-09-04, 07:05
Replies: 1
Views: 1,399
Posted By jnml
False, true or well known?

Given prime [$]p[/$] and [$]M_p = 2^p-1[/$]:

If [$]M_p-3[/$] is not a quadratic residue modulo [$]M_p[/$] then [$]M_p[/$] is composite.

Alternative, stronger version:

[$]M_p[/$] is prime iff...
Forum: Miscellaneous Math 2020-08-16, 13:35
Replies: 9
Views: 2,357
Posted By jnml
It's fine if you prefer to keep the PDF to just...

It's fine if you prefer to keep the PDF to just yourself.

It's fine if you prefer to sell it for money.

It's bad to "publish" it for free - but at a site that requires registration and or...
Forum: Miscellaneous Math 2020-07-22, 08:11
Replies: 57
Views: 21,335
Posted By jnml
I see his posts as direct and honest. But more...

I see his posts as direct and honest. But more importantly, informed. Even when they're coming with no sugar coating

I object to threatening him with a life-long ban for that.
Forum: Miscellaneous Math 2020-06-23, 13:53
Replies: 59
Views: 9,810
Posted By jnml
This is what happens when you invent a notation...

This is what happens when you invent a notation but you keep its meaning to yourself.

Please explain and define the notation you're using. Don't let people guess the meaning.

For example , all...
Forum: Miscellaneous Math 2020-06-23, 12:20
Replies: 59
Views: 9,810
Posted By jnml
Yes I did. As your notation was not defined at...

Yes I did. As your notation was not defined at all, I can only guess if I have inferred it right.

Let's test that: Is post #1 (https://www.mersenneforum.org/showpost.php?p=548302&postcount=1)...
Forum: Miscellaneous Math 2020-06-18, 08:41
Replies: 59
Views: 9,810
Posted By jnml
Pardon my ignorance, but I have no idea what, new...

Pardon my ignorance, but I have no idea what, new or not, theory you're talking about. I
see here only a (over)simplified and vague/insufficient definition of division.

But the division by zero...
Forum: Miscellaneous Math 2020-05-02, 12:37
Replies: 6
Views: 1,566
Posted By jnml
I don't think the function in #1...

I don't think the function in #1 (https://www.mersenneforum.org/showpost.php?p=544439&postcount=1) qualifies as a Lissajous curve (https://en.wikipedia.org/wiki/Lissajous_curve).
The reason I see is...
Forum: Miscellaneous Math 2020-05-02, 10:25
Replies: 6
Views: 1,566
Posted By jnml
14 to 17 and that's all.

14 to 17 and that's all.
Forum: Miscellaneous Math 2020-05-02, 10:23
Replies: 6
Views: 1,566
Posted By jnml
10 to 13

10 to 13
Forum: Miscellaneous Math 2020-05-02, 10:22
Replies: 6
Views: 1,566
Posted By jnml
6 to 9

6 to 9
Forum: Miscellaneous Math 2020-05-02, 10:20
Replies: 6
Views: 1,566
Posted By jnml
Divisibility function

[$]\forall N \ne 0,\ x \in [1,\ N]: \ sin \, x \pi +\imath \, sin \frac{N \pi}{x} = 0 \leftrightarrow x|N.
[/$]

I'm not aware of any practical value, but I like the pictures, produced in Maxima...
Forum: Forum Feedback 2020-01-31, 09:38
Replies: 3
Views: 6,112
Posted By jnml
Also, there's no obligation to _use_ the account....

Also, there's no obligation to _use_ the account. It can sleep and wait if you may happen to
need it any time in the future.
Showing results 1 to 25 of 177

 
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