Chinese characters in product description Error utf unable to serialize

This is the error I get when I save Chinese characters in product description

1 exception(s): Exception #0 (InvalidArgumentException): Unable to serialize value. Error: Malformed UTF-8 characters, possibly incorrectly encoded  Exception #0 (InvalidArgumentException): Unable to serialize value. Error: Malformed UTF-8 characters, possibly incorrectly encoded <pre>#1 Magento\Framework\App\PageCache\Kernel->process(&Magento\Framework\App\Response\Http\Interceptor#000000003982af7000000000142eda42#) called at [vendor/magento/module-page-cache/Model/Controller/Result/BuiltinPlugin.php:96] #2 Magento\PageCache\Model\Controller\Result\BuiltinPlugin->afterRenderResult(&MGS\Mpanel\Block\Framework\Page\Interceptor#000000003982abaf00000000142eda42#, &MGS\Mpanel\Block\Framework\Page\Interceptor#000000003982abaf00000000142eda42#, &Magento\Framework\App\Response\Http\Interceptor#000000003982af7000000000142eda42#) called at [vendor/magento/framework/Interception/Interceptor.php:146] #3 MGS\Mpanel\Block\Framework\Page\Interceptor->Magento\Framework\Interception\{closure}(&Magento\Framework\App\Response\Http\Interceptor#000000003982af7000000000142eda42#) called at [vendor/magento/framework/Interception/Interceptor.php:153] #4 MGS\Mpanel\Block\Framework\Page\Interceptor->___callPlugins('renderResult', array(&Magento\Framework\App\Response\Http\Interceptor#000000003982af7000000000142eda42#), array(array('result-messages', 'result-builtin-c...', 'result-varnish-c...'))) called at [generated/code/MGS/Mpanel/Block/Framework/Page/Interceptor.php:156] #5 MGS\Mpanel\Block\Framework\Page\Interceptor->renderResult(&Magento\Framework\App\Response\Http\Interceptor#000000003982af7000000000142eda42#) called at [vendor/magento/framework/App/Http.php:140] #6 Magento\Framework\App\Http->launch() called at [generated/code/Magento/Framework/App/Http/Interceptor.php:24] #7 Magento\Framework\App\Http\Interceptor->launch() called at [vendor/magento/framework/App/Bootstrap.php:258] #8 Magento\Framework\App\Bootstrap->run(&Magento\Framework\App\Http\Interceptor#000000003982af7e00000000142eda42#) called at [index.php:39] 

Facebook page policy regarding sharing of same url & description with different infographics

My website is centered around a single product. I usually create several infographics (images) relevant to my target audience and share on my website. I am thinking of sharing these infographics on my Facebook page as well. Daily I would be sharing around 15 to 20 infographic photos. While uploading the infographics, am I permitted to add a short description and hyperlink to my product page (in the status/text input area)? I am asking this because, the description and hyperlink aren’t going to change with infographics. They will be the same as my website is focused on one single product?

Measure the “quality” of a description

I have interviewed 36 people, divided in three groups of 12 people. For one group I asked to describe a song they just heard. The second group had to describe a song by observing only a graphical representation of the song and the last group had the song and the representation.

My intention was to measure how the graphical representation helped the users to increase the quality of their description.

Now, the problem is, are there works with methodologies similar to mine? How do you think I could measure the quality of a description? Number of words? Number of adjectives used? With an entropy calculator? I committed the mistake of not consulting first a methodology to inspire my process.

Explicit description of the conjugation action of $a_p = [[1,0],[0,p]]$ on the amalgam $SL(2,\mathbb{Z})*_{\Gamma_0(p)} a_pSL(2,\mathbb{Z})a_p^{-1}$

Let $ a_p$ denote the matrix $ [[1,0],[0,p]]$ , where $ p$ is prime.

Then $ SL_2(\mathbb{Z}[1/p])$ can be presented as the amalgamated product

$ $ SL_2(\mathbb{Z})*_{\Gamma_0(p)} a_pSL_2(\mathbb{Z})a_p^{-1}$ $ where $ \Gamma_0(p)$ are the matrices which are upper-triangular mod $ p$ , and the inclusions into the two factors are the natural ones.

I would like to construct the group $ GL_2(\mathbb{Z}[1/p])$ (in the software package GAP) as a semidirect product of $ SL_2(\mathbb{Z}[1/p])$ and $ p^\mathbb{Z}$ .

For this, I need to tell GAP the action of conjugation of $ a_p$ on $ SL_2(\mathbb{Z}[1/p])$ in terms of the generators of the amalgamated product (ideally algorithmically easy ones, e.g. the 4 generators coming from the two copies of $ SL_2(\mathbb{Z})$ ).

I’m sure this must have been done somewhere. Does anyone have a reference? (Or perhaps can someone give an explicit presentation of this conjugation action?)

(Also posted here)

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How to remove tags from short description programmatically in Magento 2?

I am using Magento 2.3.1

I have 8000 products which are migrated from Magento 1. The issue is that the
tags are added in short and long description in Magento 2. Please see below content for reference: enter image description here

This is how short description looks like in the front end. Below content is added in the product in admin:

This is the short description migrated from Magento 1<br><br>short description<br><br>• This is the point 1<br>• This is the point 2<br>• This is the point 3<br>• This is the point 4<br>• This is the point 5<br>•<b>This is the point 6</b> 

I have used the below code:

<?php    $  short_description = strip_tags( $  short_description, 'li' );   $  short_description = "<ul><li>" . preg_replace( '/[\r\n]+/', '</li><li>',    $  short_description ) . "</li></ul>";   $  short_description = str_replace('<li></li>', '', $  short_description );  ?> <?= $  short_description ?> 

But the whole content is displayed in one <li> tag after implementing the above code.

Now I want to add each bullet points in <li> tags and also I want to remove <br> tag from the content as well. how can I do this?

Description for languages that can be solved in time(n)?

How can one describe all languages that are in $ \mathrm{TIME}(n)$ ?

It can’t be all the regular languages only, as for example $ L = \{a^n b^nw \mid w \in \Sigma^* \land n \geq 1\}$ is not regular but in $ \mathrm{TIME}(n)$ . Furthermore there are regular languages (like any modulo languages) that are not in $ \mathrm{TIME}(n)$ .

So, is there a nice description for all $ L \in \mathrm{TIME}(n)$ ?

How to get url and description of FileFieldItemList’s items in node template

I have a content type called publication which results the node’s twig template: node--publication.html.twig. This content type contains a multiple file fields where the description is allowed.

I would like to share it with you, because it took a lot of time for me to find out how can I iterate through and render the items of a FileFieldItemList which would be a very easy thing without the drupal theming system.

Some of you might find useful it.