Can I use Mathematica to find the values of $n$ for which the ordinary hypergeometric function is defined?

For some $ n$ , Mathematica cannot compute the solution to a problem I am working on, because the ordinary hypergeometric function is not defined for all values of $ n$ .

Can I use Mathematica to find the values of $ n$ for which the ordinary hypergeometric function is defined?

How to group rows while filtering out values per each group?

Imagine you have the following setup:

CREATE TABLE namechanges (   id text,   new_name text,   change_date timestamp );  INSERT INTO namechanges VALUES   ('x', 'alice', '2020-03-01'),   ('y', 'Bob T.', '2020-03-03'),   ('x', 'Alice', '2020-03-05'),   ('z', 'charlie', '2020-03-07'),   ('x', 'Alice C.', '2020-03-09'),   ('z', 'Charlie Z.', '2020-03-11') 

How would look like a query that would retrieve just the current name for each id and return the following?

| id  | max        | | --- | ---------- | | z   | Charlie Z. | | y   | Bob T.     | | x   | Alice C.   | 

Here’s the example above on DB Fiddle if you want to play with it:

Minimum Cost Tree From Leaf Values solution explanation needed

I’m trying to understand the solution for the question posted here:

One of the solutions is to find the minimum leaf node, add the product with its smaller neighbor and remove it from the array and continue the same way until array size is one.

here is the link for the solution:

What is the result binary tree? why is it working..


Is Artificial intelligence simply taking decisions on the basis of values produced by a machine learning model

I am researching on AI and its working. Whenever I try to search for AI algorithms, ML algorithms come up. Then, I read the differences between ML & AI. One of the key points mentioned was “AI is decision making” & “Machine learning is generating values and learn new things”.

I come up with a conclusion that ML allows us to take generate some sort of values and using AI we can make decisions with those values.

But I am confused with “The weather forecast” problem. Our machine learning model will directly generate the decision that will it rain or not? Is our ML model lies in the AI domain or I am wrong? Help me!

Fonts appear darker even using the same rgba values

I’m trying to build a layout like google drive, and have managed to get as close as possible. One thing I’ve noticed is, even when I’m using the same font roboto 13px and the same rgba values rgba(0,0,0,0.72): the font on my site appears a bit darker than the one on google’s site. How can this be happening? When looking at the two in Chrome Dev Tools there’s a difference in contrast. How do I set this contrast value? Google’s is 9.29 and mine is 1.42. Can this be causing the difference?

Google’s Image2

My Image

Filter verified links without values

I sometimes see verified links such as a profile (or other) where i only see my link. I would like to be able to sort this “bad” link and not keep it for the benefit of another link which contains a minimum text, for example a certain number of sentences, words, or even in weight of text, any surrounded by a minimum of words in order to build my thirds on something long term quality.

Does one of the normal forms require separation of repeating clusters of values into another table?

Should the repeating values in the “Sales” table below be separated out into a second table as part of the process of database normalization? Note that none of the values are functionally dependent on each other; those values that are functionally dependent are already normalized out to other tables. I’m just not sure if there’s any benefit to separating the “clusters” of values in different domains out into a separate table since the table contains tens of millions of rows, but only a few thousand distinct combinations of these values:

LOCATION     PRODUCT         RECIPIENT     DATE       AMOUNT   New York     Cheesecake      Bill          1/1/2000   $  25.00 New York     Cheesecake      Bill          2/1/2000   $  42.00 New York     Cheesecake      Bill          3/1/2000   $  17.00 Dallas       Cheesecake      Bill          4/1/2000   $  15.00 Dallas       Cheesecake      Bill          5/1/2000   $  17.00 Dallas       Cherry Pie      Bill          6/1/2000   $  14.00 Dallas       Cherry Pie      Bill          7/1/2000   $  13.00 Dallas       Cherry Pie      Sam           8/1/2000   $  16.00 

The table would be separated into a “Sale Types” table:

SALETYPE     LOCATION    PRODUCT       RECIPIENT 1            New York    Cheesecake    Bill 2            Dallas      Cheesecake    Bill 3            Dallas      Cherry Pie    Bill 4            Dallas      Cherry Pie    Sam 

So that the original “Sales” table would look like this:

SALETYPE     DATE        AMOUNT 1            1/1/2000    $  25.00 1            2/1/2000    $  42.00 1            3/1/2000    $  17.00 2            4/1/2000    $  15.00 2            5/1/2000    $  17.00 3            6/1/2000    $  14.00 3            7/1/2000    $  13.00 4            8/1/2000    $  16.00 

Since each unique combination of values appears approximately 1,000 times each on average, I believe that would save storage and potentially memory pressure, but my understanding of the underlying RDBMS memory optimizations is admittedly pretty limited. Would that be considered database normalization though?

Axis Mapping gives one-sided values

this has got me stuck badly: my project is in 2.5D. Jumping and crouching not implemented yet.

Making use of Axis Mapping Input from the project settings, where numpad 4= 1 and numpad 6= -1 to control my movement, the follow problem poses itself:

I have a blendspace with a horizontal axis which is MovementDirection from -1 to 1 divided in 2.The upward axis is a MovementSpeed from 0 to = 200 = Max Walk Speed on my CharacterMovement asset.

In this Blendspace I go from idle in the bottom middle, to WalkForward and WalkBackward in the upper outer extremes.

However, when in my Level Blueprint I get my MovementSpeed and MovementDirection variables from my “BP_Player” Anim Instance, in order to print them, I can see that my MovementSpeed goes all the way to my max which is 200, while in the other direction it’s stuck around 0,01.

I thought it would go -200 but it doesn’t, which is messing up my WalkForward blendspace part, only blending very slightly into it.

However in the blendspace I have positioned my WalkForward and WalkBackward animations correctly.

Any idea where I could have gone wrong?

ACF Dynamic select values not showing data

This question makes me crazy for almost 2 weeks. I know I am not expert in WordPress, so I am seeking for help here.

I have create a href that when user click it will go to new page.

<a href="./create-class?post=<?php echo $  post->ID; ?>">Add Class2</a> 

This href post the Post id. Url display:


create-class page:

At create-class page,I am using GET method to display post id from url

$  post = $  _GET['post']; 

I have acf form in create-class page for create new post. In this form, there have dynamic select field but the select field not display any data.

 <?php      acf_form(array(           'post_id'   => 'new_post',           'field_groups' => array(150),           'post_title'  => false,           'post_content'  => false,           'new_post'    => array(                   'post_type'   => 'classes',                   'post_status' => 'publish',                   ),           'return'    => '%post_url%',           'submit_value'  => 'Submit',           //'updated_message'    => 'Course Submit!',         )); ?> 

in my function.php I create function for dynamic select:

function acf_load_t_first_name2_field_choices($  field) {     global $  post;     //$  post = $  _GET['post'];     // reset choices     $  field['choices'] = array();       // get the textarea value from options page without any formatting     $  choices = get_field('t_first_name',$  post->ID);        // loop through array and add to field 'choices'     if( is_array($  choices) ) {          foreach( $  choices as $  choice ) {              $  field['choices'][ $  choice ] = $  choice;          }      }       // return the field     return $  field;  }  add_filter('acf/load_field/name=t_first_name2', 'acf_load_t_first_name2_field_choices');  

Is there something wrong with my code?