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Search took 0.05 seconds. Search: Posts Made By: ColdFury
Forum: Miscellaneous Math 2008-12-21, 03:14
Replies: 174
Views: 17,976
Posted By ColdFury
Shor's algorithm is a *factoring* algorithm. The...

Shor's algorithm is a *factoring* algorithm. The only way it can determine primality is if it happens to discover a factor. There isn't (as far as I know) any known algorithm that determines...
Forum: Math 2008-03-18, 00:58
Replies: 67
Views: 10,154
Posted By ColdFury
Is this the same "friend" who had the radical...

Is this the same "friend" who had the radical compression technique?
Forum: Software 2008-03-02, 06:41
Replies: 15
Views: 2,164
Posted By ColdFury
As I recall, GMP uses malloc to allocate memory...

As I recall, GMP uses malloc to allocate memory for limbs above a certain operand size. The implementation of malloc that msvc uses versus gilbc's malloc implementation could make a huge difference...
Forum: Software 2008-03-01, 04:38
Replies: 6
Views: 667
Posted By ColdFury
Then if you put a semi-colon after the macro...

Then if you put a semi-colon after the macro statement it won't work, since {}; is not valid.
Forum: Software 2008-03-01, 01:54
Replies: 6
Views: 667
Posted By ColdFury
Consider the second macro: if (some...

Consider the second macro:

if (some condition)
MPN_NORMALIZE_NOT_ZERO(DST, NLIMBS);


This expands to:

if (some condition)
do {
Forum: jasong 2007-12-12, 01:28
Replies: 14
Views: 2,651
Posted By ColdFury
Thats the ONLY purpose of a business.

Thats the ONLY purpose of a business.
Forum: Linux 2007-11-21, 04:10
Replies: 10
Views: 1,662
Posted By ColdFury
Probably because the file isn't in your PATH...

Probably because the file isn't in your PATH environment variable.
Forum: Software 2007-11-17, 05:55
Replies: 3
Views: 4,305
Posted By ColdFury
Yes, it is totally ignored. Compilers will...

Yes, it is totally ignored. Compilers will automatically allocate variables to registers as needed.
Forum: Software 2007-11-17, 02:23
Replies: 3
Views: 4,305
Posted By ColdFury
The register keyword is extremely outdated and is...

The register keyword is extremely outdated and is ignored by all compilers. Local function prototypes are considered very bad style as well. There's no need to use calloc, when malloc would have...
Forum: Programming 2007-11-07, 01:27
Replies: 11
Views: 3,572
Posted By ColdFury
Does this have to work for strings representing...

Does this have to work for strings representing arbitrarily large numbers? If not:


bool isNonNegInt(string str) {
istringstream iss(str);
int x;

if (!(iss >> x))
return...
Forum: Information & Answers 2007-10-06, 01:28
Replies: 4
Views: 1,846
Posted By ColdFury
Its a harmless diagnostic message.

Its a harmless diagnostic message.
Forum: Math 2007-05-29, 21:30
Replies: 4
Views: 1,036
Posted By ColdFury
I've decided to use a set of 8 (possibly 16)...

I've decided to use a set of 8 (possibly 16) different point additions as the map (with no doubling).
Forum: Math 2007-05-28, 18:04
Replies: 4
Views: 1,036
Posted By ColdFury
The starting point has order...

The starting point has order 680564733841876926932320129493409985129, and the order of the entire curve is 4*680564733841876926932320129493409985129, so I don't believe that should not be a problem.
Forum: Math 2007-05-28, 08:49
Replies: 4
Views: 1,036
Posted By ColdFury
Pseudo-random maps over an elliptic curve

Anyone have any idea how exactly pseudo-random the map F(P) = 2P behaves where P is a point on a Koblitz elliptic curve defined over GF(2^131)?

I'm currently implementing a core used for a...
Forum: Factoring 2007-05-27, 03:37
Replies: 16
Views: 2,785
Posted By ColdFury
I'm currently working on a ECC core that can be...

I'm currently working on a ECC core that can be used for D.net. If I can get good performance out of it I'm going to contact D.net to propose setting up an attack on the challenge.
Forum: Science & Technology 2007-02-18, 02:18
Replies: 7
Views: 1,482
Posted By ColdFury
You are the one that sounds confused, since I am...

You are the one that sounds confused, since I am talking about NP-Complete problems, and not problems in gneeral. It is not an opinion. I'm in graduate school for computer science, I know very well...
Forum: Hardware 2007-02-17, 01:58
Replies: 24
Views: 4,439
Posted By ColdFury
This is a adiabatic quantum computer, and people...

This is a adiabatic quantum computer, and people have serious doubts that an adiabatic quantum computer has the full computational power of a regular quantum computer.
Forum: Science & Technology 2007-02-17, 01:57
Replies: 7
Views: 1,482
Posted By ColdFury
Quantum computers cannot solve NP-complete...

Quantum computers cannot solve NP-complete problems any faster than classical computers. At least nobody knows how they can if they can. Factoring is not NP-Complete.
Forum: Software 2007-01-30, 02:35
Replies: 1
Views: 881
Posted By ColdFury
It will make no difference, as it only affects...

It will make no difference, as it only affects how fast an application loads.
Forum: Lounge 2007-01-15, 01:47
Replies: 63
Views: 3,824
Posted By ColdFury
It has been abnormally hot on the east coast for...

It has been abnormally hot on the east coast for this entire winter, with temps sometimes reaching into the 60s. It has not been bitter in any sense of the word.
Forum: Hardware 2006-11-29, 23:53
Replies: 6
Views: 2,265
Posted By ColdFury
Also remember that all QC algorithms, by their...

Also remember that all QC algorithms, by their nature, are non-deterministic.
Forum: Programming 2006-11-28, 11:19
Replies: 5
Views: 1,160
Posted By ColdFury
Its a Win32 API, so definitely not. Using...

Its a Win32 API, so definitely not.

Using pthreads is really the best solution. You get automatic portability and its very efficient. You don't have to worry about busy-waiting because the...
Forum: Programming 2006-11-28, 03:38
Replies: 5
Views: 1,160
Posted By ColdFury
Instead of rolling your own synchronization...

Instead of rolling your own synchronization primitives, just use pthreads. Its available on both Win32 and Linux, and they have solved all this stuff already.

http://sourceware.org/pthreads-win32/
Forum: Software 2006-09-01, 00:27
Replies: 27
Views: 2,755
Posted By ColdFury
All of this stuff should be handled automatically...

All of this stuff should be handled automatically by the operating system.
Forum: Science & Technology 2006-07-30, 00:26
Replies: 14
Views: 2,370
Posted By ColdFury
A non-sequitor, quantum physics does not talk...

A non-sequitor, quantum physics does not talk about black holes or dark matter at all.
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