i know that there were a few similar question but my problem is a little bigger - one of (i think) preinstalled repositories throws me this error when trying to update/refreshing synaptic : The repository 'http://ppa.launchpad.net/deadsnakes/ppa/ubuntu hirsute Release' does not have a Release file.  am i have to contact canonical or this isn't one of defaults? i'm not looking always at url when adding repo... and this stops updater (i just think that there is already update)
When updating, I get the following error message:   W: The repository 'http://ppa.launchpad.net/mc3man/trusty-media/ubuntu xenial Release' does not have a Release file.   Here, I find another statement on this error:   This recommends removing certain PPAs; and, I'm not sure if I should do that since it might mean not getting the updates that I need.    Is this what I should do?
In  (ignoring Hawking radiation), why is a  black? Why nothing, not even light, can escape from inside a black hole? To make the question simpler, say, why is a  black hole black? What does 5' and 3' mean in DNA and RNA strands? What are 5' and 3' in DNA and RNA strands? Please clarify with some images and please use simple English. how to place JS-code to NewForm.aspx of a list in SharePoint 2013 APP.  In sharepoint 2010 we can use this list definition to add JS:  &lt;List ...&gt;   &lt;MetaData&gt;     ...     &lt;Form Type="NewForm" Url="NewForm.aspx" SetupPath="pages\form.aspx" WebPartZoneID="Main" UseDefaultListFormWebPart="False"&gt;         &lt;WebParts&gt;           &lt;AllUsersWebPart WebPartZoneID="Main" WebPartOrder="1"&gt;             &lt;![CDATA[              &lt;WebPart xmlns="http://schemas.microsoft.com/WebPart/v2"                 xmlns:sfwp="http://schemas.microsoft.com/WebPart/v2/SimpleForm"&gt;               &lt;Assembly&gt;Microsoft.SharePoint, Version=15.0.0.0, Culture=neutral, PublicKeyToken=71e9bce111e9429c&lt;/Assembly&gt;                                        &lt;TypeName&gt;Microsoft.SharePoint.WebPartPages.SimpleFormWebPart&lt;/TypeName&gt;               &lt;FrameType&gt;None&lt;/FrameType&gt;               &lt;Title&gt;JS1&lt;/Title&gt;               &lt;sfwp:Content&gt;ANY HTML YOU NEED HERE               &lt;/sfwp:Content&gt;             &lt;/WebPart&gt;             ]]&gt;           &lt;/AllUsersWebPart&gt;           &lt;AllUsersWebPart WebPartZoneID="Main" WebPartOrder="2"&gt;             &lt;![CDATA[             &lt;WebPart xmlns="http://schemas.microsoft.com/WebPart/v2"&gt;               &lt;Assembly&gt;Microsoft.SharePoint, Version=15.0.0.0, Culture=neutral, PublicKeyToken=71e9bce111e9429c&lt;/Assembly&gt;                                        &lt;TypeName&gt;Microsoft.SharePoint.WebPartPages.ListFormWebPart&lt;/TypeName&gt;               &lt;PageType&gt;PAGE_NEWFORM&lt;/PageType&gt;             &lt;/WebPart&gt;             ]]&gt;           &lt;/AllUsersWebPart&gt;         &lt;/WebParts&gt;       &lt;/Form&gt;     &lt;/Forms&gt;   &lt;/MetaData&gt; &lt;/List&gt;   How to do the same for Sharepoint 2013? Asking similar questions - process? How do I calculate someone's age based on a DateTime type birthday? Given a DateTime representing a person's birthday, how do I calculate their age in years? CSS selector for first element with class Oven temperature for multiple ducks? Function $f(z)$ is holomorphic at least within the unit disk.   If for all arguments $|z|&lt;1$ we have $|f(z)| \le 1$, and there exists a zero of order $n$ at $z=z_0$, then show that $|f(0)| \le |z_0|^n$.  How should I tackle this problem? Can it be generalized if for $|z|&lt;R$ we have $|f(z)| \le M$ ?    So far I only understand that there exists a holomorphic $g(z)$ with $g(z_0) \ne 0$ such that $f(z) = (z-z_0)^n g(z)$,then $|f(z)| = |z-z_0|^n |g(z)| \le 1$ and moreover $|f(0)| = |z_0|^n |g(0)|$, but that doesn't seem useful since apparently I know too little about $g(z)$. In particular why should $|g(0)| \le 1$? A vessel is filled with liquid,3 parts of which are water and 5 parts syrup.How much of the mixture must be drawn off and replaced with water so that the mixture may be half water and half syrup?  What is the best possible way to solve this question? How to add thickness to a curve? How can I add thickness to a curve? I already tried with the extrude and depth options in the curve settings, but it doesn't work properly. Show that the function $g(x) = x^2 \sin(\frac{1}{x}) ,(g(0) = 0)$ is everywhere differentiable and that $g′(0) = 0$ Show that the function $g(x) = x^2 \sin\left(\frac{1}{x}\right) ,(g(0) = 0)$ is everywhere differentiable and that $g′(0) = 0$. "Each person's car" vs. "each persons' car" Which of the following is correct?        Each person's car has four wheels.   Each persons' car has four wheels. Why is it not possible to overload class templates? How can I display site logo, name and slogan? how can i show site logo, name and slogan Separately in custom area in my site theme, I now use this code to display theme, buts this code don't allow me to edit each of them Separately.  {{ page.header }} If a function has a finite limit at infinity, does that imply its derivative goes to zero? I've been thinking about this problem: Let $f: (a, +\infty) \to \mathbb{R}$ be a differentiable function such that $\lim\limits_{x \to +\infty} f(x) = L &lt; \infty$. Then must it be the case that $\lim\limits_{x\to +\infty}f'(x) = 0$?  It looks like it's true, but I haven't managed to work out a proof. I came up with this, but it's pretty sketchy:  $$ \begin{align} \lim_{x \to +\infty} f'(x) &amp;= \lim_{x \to +\infty} \lim_{h \to 0} \frac{f(x+h)-f(x)}{h} \\ &amp;= \lim_{h \to 0} \lim_{x \to +\infty} \frac{f(x+h)-f(x)}{h} \\ &amp;= \lim_{h \to 0} \frac1{h} \lim_{x \to +\infty}[f(x+h)-f(x)] \\ &amp;= \lim_{h \to 0} \frac1{h}(L-L) \\ &amp;= \lim_{h \to 0} \frac{0}{h} \\ &amp;= 0 \end{align} $$  In particular, I don't think I can swap the order of the limits just like that. Is this correct, and if it isn't, how can we prove the statement? I know there is  already, but I think this is different in two aspects. First, that question assumes that $\lim\limits_{x \to +\infty}f'(x)$ exists, which I don't. Second, I also wanted to know if interchanging limits is a valid operation in this case. Remove Archives in category title How I can remove word "Archives" in head title in category page? I'm using the Twenty Twelve theme and WordPress 4.   &lt;head&gt; &lt;title&gt;"name of category" Archives  | "name of sites"&lt;/title&gt; &lt;/head&gt; At the end of every day you will be required to write a review.   At the end of each day you will be required to write a review.   Which one of those sentences is better if this action will repeat itself every day for longer period of time, several weeks for example, maybe even months? Zero probability and impossibility I read a comment under :     There are plenty of events that can occur that have zero probability.   This reminds me that I have seen similar saying before elsewhere, and have never been able to make sense out of it. So I was wondering    if zero probability and impossibility mean the same? if an event with zero probability doesn't mean that the event is impossible to occur, how probability theory represents/describes impossibility?   Thanks and regards! While working together, how can I discuss my ideas and objections without killing the other person’s motivation?  I want to do a design project with a friend, for study purposes, but I experienced some obstacles I don’t know how to deal with:   We didn’t learn yet how to deal with objections or dislikes from the other. As a result our meetings are inefficient, either because we let the other do whatever they want, or because someone gets into a bad mood and instead of thinking, they try to put on an unaffected face. My friend has a habit of letting their attention stray away, and they do it at the most unexpected times.   I know that being sincere is needed and inevitable, but I would like to learn a method to keep the attention and motivation even in these situations. My problem is that I don’t know what to say or do to keep our task looking interesting and fun to do.  As a possible solution I thought of inserting a 5 minute period where we shouldn’t say any good things, not even a word, but have to point out the bad parts of our own work.  But I fear this one won’t be enough, that’s why I would like to hear ideas and tricks that could make our sessions going. ISP blocking port 25 My ISP has started blocking port 25 so I can not send email through my dedicated server any more.   I have several options:   Send email through the SMTP server provided by my ISP. Any problems with this? Setup mu server so that it receives email on another port instead of port 25     No one else sends email through my server so it should be OK. How do I do this on a Linux server? Buy a static client IP - these are not being blocked so far.   Which one is preferable?