## Paperwork – When registering with the police, if you are an EU citizen in the Czech Republic, is there a 30-day registration earlier?

https://www.policie.cz/clanek/reporting-of-the-place-of-aliensresidence.aspx states:

An EU citizen is required to report his or her residency within 30 days of entering the territory of the police if his probable stay is longer than 30 days. This obligation also applies to family members of an EU citizen if that EU citizen resides in the territory. The duty to report residence to the police does not apply to a foreigner who has fulfilled this obligation at the tourist accommodation.

Is there an advantage if you register with the police 30 days ago when registering as an EU citizen to visit the Czech Republic?

## PSG from the French League Cup Monaco

PSG from the French League Cup Monaco with avant-garde sports, undefeated Ligue 1 leadership and defending champion Paris St-Germain. Neymar championed PSG, who has won the trophy over the past five seasons.

Had a shock of the French League Cup against Guingamp of the top class, avant-garde sports

Marcus Thuram, the son of French legend Lilian, had previously missed a defeat and punished an injury time. Yeni N & # 39; Gbakoto had previously won 2-1.

,

## Matrix eigenvector corresponding to a certain eigenvalue already found earlier

Just a quick question that is very simple but difficult to explain. I use 4 specific eigenvalues ​​of a large 80×80 k-dependent matrix. I have found the 4 eigenvalues ​​of interest for different k and sorted them into 4 different lists as needed. Now I am interested in their eigenvectors.

My question is, is there any other way than Solve to bring the eigenvector to a specific eigenvalue. I think I could use eigensystem, let Mathematica find all 80 again and choose the EVec according to the already found Eval. That seems a bit stupid because I do not need the 79 others.

On the other hand, Solve also looks like overcomplication of the problem, since I do not use a built-in algorithm to find eigenvectors. In addition, my initial attempts were unsuccessful, and error messages were displayed pointing to poorly-conditioned matrices leading to large numerical errors.

Help would be very grateful! Many Thanks

EDIT1: Using Eigensystem has shown me that the eigenvalue eigenvalues ​​in the 16th digit are different than the Eigen system results !! Why this! And how can you handle this?

## How do I change Build Gradle to an earlier version (Android Studio)?

I am creating a project that runs on the version of Android Studio 3.1, and I have this old version of Android Studio, but the build level is up to date and I can not run my codes. I do not want to change my codes or adapt to the old version Can you help me?
I've already tried giving up and reinstalling, and still does not change build.gradle.

How are you now

``````android {
compileSdkVersion 28
defaultConfig {
applicationId "com.example.t_gamer.myapplication"
MinSdk version 16
targetSdkVersion 28
versionCode 1
Version name "1.0"
testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile (pr proguard-android.txt &), pr proguard-rules.pro #;
}
``````

How do I want it to stay that way?

``````android {
compileSdkVersion 27
defaultConfig {
applicationId "com.example.t_gamer.deepcooeesite"
MinSdk version 16
targetSdkVersion 27
versionCode 1
Version name "1.0"
testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile (pr proguard-android.txt &), pr proguard-rules.pro #;
}
}
productFavors {
}
``````

## Please help me, why can not I multiply this matrix / vector with a scalar, as I can do earlier on the expression. Many Thanks

``````in the[320]: = m = {{1, 2}, {3, 4}}

out[320]= {{1, 2}, {3, 4}}

in the[321]: = m[[1, 2]]out[321]= 2

in the[322]: = (1 / m[[1, 2]]) * m

out[322]= {{1/2, 1}, {3/2, 2}}

in the[323]: = n = {{4, 5}, {6, 7}}; (1 / n[[1, 1]]) * n

out[323]= {{1, 5/4}, {3/2, 7/4}}

in the[324]: = Matrix power[n, 2]

out[324]= {{46, 55}, {66, 79}}

in the[325]: = v = {1, 2};

in the[331]: = c = MatrixPower[n, 2].v;

in the[336]: = d = c[[1]];

in the[337]: = (1 / d) * c

out[337]= {1, 56/39}

in the[355]: = l = matrix power[{{4, -2}, {-3, 3}}, 3]({
{1}
{1}
});

in the[356]: = j = l[[1]];

in the[357]: = k = 1 / l;

in the[358]: = (1 / j) .l

During the evaluation of In[358]: = Dot :: dotsh: tensors {1/44} and {{44}, {- 42}}
``````

have incompatible forms.

``````out[358]= {1/44}. {{44}, {-42}}
``````

I've tried multiplying them by the dot instead of using the dot, and I seem to get the same result. I'm new to these kinds of things, so please be nice, thanks. I want to be able to really use certain parts of the result of my function and multiply them by the function in a code.

## Here's how to hire the best iOS developers

When hiring an iPhone App Development Company or an iOS developer, several factors should be considered. Below is a list of most of the ways companies can build the best iOS app.

Check the developer's profile / portfolio
Checking the developer profile is the first step while searching for iOS developers. A professional iOS developer shows his portfolio with his previous iOS app development projects. Companies can gather many clues and information from this information in the developer's portfolio. Also review the references from previous organizations to make sure the developers have actually worked on these projects.
Check the communication skills of the developers and the channels they use
Make sure the iOS App Developer has good social and communication skills. As the project evolves, you must communicate so often with the developers regarding some changes / updates to the project. Therefore, developers should be able to respond quickly within 24 hours.
Check the skills of the developers
The companies should also determine the programming knowledge and expertise of the developers. You should have sufficient development skills to create error-free codes. If you want a quality app, developers should have provided a reliable quality code for all the projects they've done. You can also have a special interview with the developers to learn their skills and know-how. In order to develop iOS apps, the developer should be able to use Objective-C or Swift programming language and be familiar with iOS technical technology.
Review customer testimonials, feedback, and ratings submitted by app users
When reviewing the developer portfolio, you should also review reviews and feedback from previous customers. Some developers may also offer tampered testimonials. You should check the reality by contacting customers. You should also review the feedback and reviews submitted by the users of the mobile app developed by the developers in the App Store.
Check if the developers are deadline
An experienced and professional developer will always work hard to meet the deadlines. Therefore, check if they meet the deadlines. Publishing the iOS app within a set amount of time can sometimes be very important to companies, as they had already planned some events. Loss of time is also a missed opportunity for many companies.

Check if the developers are creative enough
The development of iOS apps requires a lot of creativity. During the design and development of the app, the developers may face many hurdles that can only be overcome by developers' creative and unconventional thinking. So make sure iOS developers are creative and adopt an innovative approach to app development.

Check if the developer clearly understood the requirements of the mobile app
You should check that the developers have fully understood the requirements of the mobile app. If you do not understand them clearly, they can not deliver the quality of the app you expect them to be.

,

## Custom Post Types – meta_query: Search Hour that starts earlier

I have custom post types for lessons that include 4 date subfields: `period_a_start`, `period_b_start`, `period_c_start`, `period_d_start`,

I would like to create a query to get the first 8 lessons to start earlier (ordered) (regardless of which period starts earlier).

So if A lesson (period_c_start = 13.12.2018), B lesson (period_a_start = 20.12.2015), C lesson (period_d_start = 14.12.2018) …..

I would like the lessons to be arranged as follows: a lesson, C lesson, B lesson …

So I have tried so far:

``````\$ args = ['post_type'=> 'cp_course', 'numberposts' => 8,'orderby' => 'menuorder', 'order' => 'ASC',
'meta_query' =>
array(
'relation' => 'OR',
array(
'key' => 'period_a_start',
'compare' => '>=',
'type' => 'numeric',
'value' => date("m/d/Y"),
),
array(
'key' => 'period_b_start',
'compare' => '>=',
'type' => 'numeric',
'value' => date("m/d/Y"),
),
array(
'key' => 'period_c_start',
'compare' => '>=',
'type' => 'numeric',
'value' => date("m/d/Y"),
),
array(
'key' => 'period_d_start',
'compare' => '>=',
'type' => 'numeric',
'value' => date("m/d/Y"),
)
)];
\$ course = get_posts (\$ args);
``````

However, this approach does not guarantee that the 8 lessons that start earlier begin sorting by date