## Reference Request – \$ n \$ is a positive prime if \$ k ^ {n-1} 1 \$ mod \$ n \$ equals \$ 1

When I read the little sentence from Fermat, I found a problem. After that, I realized that the problem is the Chinese Hypothesis.

When I read Wilson's sentence, I found that $$(p-2)! equiv -1$$ mod $$p$$ but after that I knew that this is a special case of the Sylow sentences.

I can not prove, can not verify by my computer the following statement, because the Chinese hypothesis is up to true $$n = {340}$$ With $$k$$ is constant $$2$$, Here I leave $$1

Is it true that if $$n$$ is a positive prime, if only if $$k ^ {n-1} equiv 1$$ mod $$n$$ With $$1

• If $$n$$ is a positive prime after the small Fermat theorem $$Rightarrow$$ $$k ^ {n-1} equiv 1$$ mod $$n$$,

• If $$k ^ {n-1} equiv 1$$ mod $$n$$ With $$k = 1, 2, 3, …, n-1$$ then $$n$$ is also prime.

Posted on Categories Articles

## nt.number theory – For a problem where \$ frac { text {prime} -1} { operatorname {rad} ( text {prime} -1)} \$ equals the sequence of primors

We denote whole numbers $$m> 1$$ share the product of different primes $$m$$ as $$operatorname {rad} (m) = prod_ { substack {p mid m \ p text {prime}}} p,$$
with the definition $$operatorname {rad} (1) = 1$$ (see you want the Wikipedia Radical of an integer), this is the famous multiplicative function in the statement of the abc conjecture. We also call that $$k$$th primorial as $$N_k = prod_ {t = 1} ^ k p_t$$ this is the product of the first $$k$$ Primes.

I was inspired in the first paragraph of the section B46 (1) to propose a variant of the type of problem the book presents. I think about solutions $$(p, k)$$, from where $$p$$ always denotes a prime number for which the identity
$$frac {p-1} { operatorname {rad} (p-1)} = N_k tag {1}$$
applies to some primitive ones $$N_k$$With $$k geq 1$$,

I've used a Pari / GP program to write the first satisfying primes $$(1)$$, these first few primes $$p$$are (this is a selection of my calculations) $$5,13,29,37,53,61,149,157,173,181,229, 269,277,$$ $$293,317, ldots$$ which correspond to these indices $$k$$& # 39; s
$$1,1,1,2,1,1,1,1,1,2,1,1,1,1 ldots$$ our origins $$N_k$$ fulfill the equation $$(1)$$,

The curiosity that I have is something about the size or cardinality of the set $$mathcal {K} = {k geq 1: (p, k) text {is a solution to the equation} (1) }.$$

Guess. The sentence $$mathcal {K}$$ is finally,

So what I'm saying is the set $$mathcal {K}$$ remains as a finite / finite set of positive integers, if the other variable $$p$$ Runs over the set of all primes.

Question. Can one refute earlier assumptions? Can you do some thinking or calculations
clarify the truthfulness of the conjecture? Many thanks.

Maybe they can be useful state boundaries or an approximation to cardinality $$| mathcal {K} |$$ for increasing segments of primes $$2 leq p leq X$$ and primors with indices $$1 leq k leq Y$$

Under these circumstances, I have no idea whether previous guesses are true, but I said I just want to find solutions to the integers $$k = 1.2$$ and $$3$$ (I do not know if my contribution to this sequence has good mathematical content, the comments are welcome).

## references:

(1) Richard K. Guy, Unresolved Problems in Number Theory, Unresolved Problems in Intuitive Mathematics Volume I, 2nd Edition, Springer-Verlag (1994).

Posted on Categories Articles

## Hetzner is incredible. Are there equals?

I like Hetzner very, very cheap for what you get. I know it's old hardware, but with 2 servers all have been knocking on wood so far. If you run it as a RAID, you can feel more secure.

Let's say I have an Intel Core i7-3770 with 2 x 3TB hard drive and 16GB of RAM for \$ 25 a month. This includes unlimited traffic on 1 Gbps uplink. Config is almost perfect and all I can wish for is a stronger CPU.

So look for something like that. Powerful machine, no SSD, 2-3 TB x 2 HDD and 1 Gbps with at least 100 TB of data traffic, unmeasured or unlimited is best

I've done some homework, reviewed the last 2 pages of offers and found nothing … Please specify where to look. Oh yes, I just want to diversify my eggs and divide between different geos / providers.

## Given a value that I need to know until the number equals a list of numbers and their index

I have a list of ascending order of numbers. For a given value, I have to know until the number matches the array and its index.

``````list myLista = new list(New[] {"2", "9", "17", "25", "35", "42", "70"});
``````

Initial index = 0.
At a value of 5, the index would be 1 and the number 9
At a value of 17, the index would be 2 and the number 17
For a value = 0, the index would be 0 and the number 2

## Hessian matrix equals zero

The function $$x times y + e ^ {- x times y}$$ if the points that make up the x-axis and the y-axis are critical points, how can I prove that they are points with a minimum, then the Hessian matrix is ​​zero at these points.

## Participate in the Free Grand Raffle draw and win Uni-currency. The value of a university currency equals one US dollar on the day of the raffle.

PARTICIPATE IN THE FREE GRAND RAFFLE DRAW AND WIN UNI CURRENCY. THE VALUE OF A UNI CURRENCY WOULD BE EQUAL TO A US DOLLAR ON THE DAY OF THE RAFFLE DRAW.

The Unigroup wants its single currency (the digital currency) to go into the hands of so many people around the world that it will free the single currency to all around the world through a unique system that takes place through participation in a raffle distributed

Thousands of people are already from around the world. Remember that you have lost nothing, because it is free. So do not miss this free opportunity, but quickly enter the raffle of the big raffle and get a 100% chance to win the university currencies.

Click on the link – Uni-currency

Posted on Categories Articles

## Linear Algebra – Is \$ | mathbf h_k ^ H mathbf f_j | ^ 2 \$ equals \$ mathbf h_k ^ H mathbf F_j mathbf h_k \$?

If $$mathbf F_k = mathbf f_k mathbf f_k ^ H$$,then

is $$| mathbf h_k ^ H mathbf f_j | ^ 2$$ equal $$mathbf h_k ^ h mathbf F_j mathbf h_k$$ ?
If so, why, if not, how do I describe it? $$| mathbf h_k ^ H mathbf f_j | ^ 2$$ if only I have $$mathbf F_j$$ and $$mathbf h_k$$?

## Why 16 equals 020 in Javascript

I compared CPFs when I got the following expression:

``````if (16 == 020) {
console.log (true)
} else {
console.log (false)
}``````

The result of this expression is `true`I would like to understand why.

## dom – XSS with escape equals sign in the jQuery selector

The site uses jQuery 1.8.3, which has a known XSS vulnerability in the selector. (Https://snyk.io/vuln/npm:jquery:20120206).

It happens filtered and urdecoded `ducument.location.hash` (`val2` below) value within the voter.

``````\$ (& Div; div[data-foo=''+filter(val1)+''][data-value=''+filter(val2)+'']& # 39)

Function filter (str) {
if (str)
return str.replace (/ ([ #;?%&,.+*~':"!^\$[]() => |  / @]) / g, & # 39; \ \$ 1 & # 39;
return str;
}
``````

I have reached the following payload:

``````
``````

It would work if the equals sign were not replaced by ` =`, Browsers do not seem to tolerate ` =` at all.

Any ideas how this can be bypassed? Or maybe another payload would work here?

## Why do I get "java.lang.NullPointerException" each time I use equals ()? Java Poo

Well, I'm doing Poo programs and every time I want to use the equals () method, when I run the code, I jump red: "java.lang.NullPointerException", why is it going to be like this?

``````public class user {

private string user;

public user (string name, string password) {

}

public String getName () {

return this.user;
}

public void setName (stringname) {

}

}

}
``````

}

``````public class sistema {

private string name;
private user list[];

public system (string name, int number of users) {

this.name = name;

}

public String getName () {

return this name;

}

public void setName (stringname) {

this.name = name;
}

public user[] getListaDeAutos (user list of users) {

returns this list of users;
}

public void setUserList (User[] User list) {

this.list of users = list of users;

}

public boolean loguearUser (string user, string password) {

Boolean state = false;
int i = 0;

for (i = 0; i <userlist.length; i ++) {
if (list of users[i].getName (). equals (user)

State = true;
}

miscellaneous

State = wrong;
}
}

Returning state;
}

public void addUsers (user user) {