Numerics – Does Mathematica use earlier calculations?

I analyze experimental results in which I have to repeat the same thing GaussianFilter a hundred times on different dates. As explained in the documentation, GaussianFilter Simply fold the data into a Gaussian kernel. Does it recalculate the kernel every time I call the function, or is the previous kernel somehow maintained and reused? Would it be more computationally efficient to predict the kernel (which I could easily do by applying)? GaussianFilter to a Kronecker delta Array), then hundreds of ListConvolveinstead of hundreds of GaussianFilters?

Gmail – How do I move a large group of emails from a "Browse" group to a specific folder I created earlier?

The easiest way was to 1. Search for your emails. 2. Select the emails you want to move. 3. Move the mouse pointer over the folder button with the down arrow to remove it.

Now you have to 1. search for the emails, 2. select the emails to be moved. 3. Label it with the appropriate label. 4. Right-click the label you just created. 5. Click on Move Move the emails.

Software testing strategies

Software testing or quality assurance strategies describe how product risks can be mitigated by stakeholders at the test level, what kind of tests need to be performed, and what entry and exit criteria apply. They are based on development documents. Many Custom Software Development Company follows the strategies of developing software.


1. RISKS. Risk management is of the utmost importance in testing. Consider therefore the risks and the risk level. For a well-established app that is slowly evolving, regression is a critical risk. Therefore, anti-regressive strategies are very useful. For a new app, a risk analysis could reveal a variety of risks when choosing a risk-based analytics strategy.

2. OBJECTIVES. Tests should meet the needs and needs of stakeholders to be successful. When it comes to finding as many mistakes as possible with less forerunner and effort, a dynamic strategy makes sense.

3. ABILITIES. Consider what skills the testers lack because strategies should not only be selected but also executed. A standards-compliant strategy is a smart option when the team lacks the skills and time to develop an approach.

5. PRODUCT. Some products, such as Contract development software and weapon systems typically have well-defined requirements. This could lead to a synergy with a needs-based analysis strategy.

6. BUSINESS. Business considerations and strategy are often important. If you are using a legacy system as a model for a new one, a model-based strategy can be used.

7. REGULATIONS. In some cases, it is not enough to satisfy stakeholders, but regulators too. In this case, a methodological strategy may be required that complies with these regulatory authorities.

You must select testing strategies based on the factors mentioned above, the schedule, the budget and the limitations of the project, as well as the realities of the organization and its policies.


Women's sweaters have come a long way since earlier times – everything else

The main idea that comes to mind with every mention of women's sweaters or pullovers in everyone's head is, in general, that this is something that is only good for warding off cold and only needs to be worn in winter. Although this is far from the real truth and sweaters can possibly be worn in other seasons, it simply shows the kind of thoughts and perceptions that most people have about this garment. The association in mind is highly focused on protection and warmth that the wearer can provide in the cold months.

Traditionally,Women sweater were always made of the finest wool, cashmere and fleece. They were extremely useful to people fighting severe colds and were the only defense in recent years before modern heating systems were installed in homes. The benefits, however, are not the only reason for their popularity.

In particular, sweaters for women have proven to be very useful in hiding body imperfections, as both slender and bulky figures are effectively camouflaged under these sweaters. They have therefore become an integral part of the wardrobe for most women and are even worn by other seasons.

Another reason for this development is the availability of these sweaters in a variety of colors, patterns and sizes. This variety did not exist in earlier days when the pullovers were only for their benefit and there were no cosmetic aspects or expectations. Then they were only available as knitwear and limited in terms of the colors you could get. Not surprisingly, it was only the older people they favored at the time, and teens generally kept away from them.

The modern pullovers make it easy for women to wear them with jeans, pants, skirts and leggings. It has also inspired many fashion designers to develop their own unique features on these pullovers, and despite the higher costs, many, especially women, lapped them. And why not, may one ask? After all, they are an excellent alternative that has been presented to them among other options and that make the most of them.

Finally you can get Women hoodies for sale at for a very reasonable price. Another piece of clothing that causes waves is the sweater, which is made from a much thinner material. They are lighter and a good choice rather than having to wear the heavier wool or merino sweaters and you can buy them all here.

sharepoint online – Moved document that caused this error "The target library has a smaller version limit than the earlier source versions of the file."

We want to move files from an online document library to another online document library within the same site collection using the "Move to" button. However, I have received the following error message: –

Enter the image description here

The target library has a smaller version limit than the source
earlier versions of the file are lost

Although source and target versioning has been enabled as follows:

1) At the source: –

Enter the image description here

2) at the destination: –

Enter the image description here

Could the problem be in the number of designs?

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

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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 ""
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile (pr proguard-android.txt &), pr #;

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 ""
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile (pr proguard-android.txt &), pr #;
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]({

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.