I have learned recently that I can delete my account and start a new one. Now there are some rules to this for example if you are in a suspension the suspension and/or ban would continue under the new accounts. Some of my SE accounts were beyond repair even by a moderator, so I deleted a couple after my question ban was over to see if it helped.  It seemed like it did.  The deletion was not automatic and had to be reviewed and approved I guess because I had to wait 24 hours. Who does that task?  Am I breaking any rules or circumventing the system (no where in the details does it give reasons or rules) or am I utilizing tools available to me by the system in the way the designer intended?  Note: I do not condone circumventing or exploiting the SE system in any way and that I only did this as a last resort to fix my accounts. I returned to Aviation.SE and asked some questions and did very well. I was also suspended but at least it wasn't for a year this time.  From moderators in Aviation.SE:  We've noticed that you deleted your old account and created a new one to circumvent the question block that the system imposed on you. Moreover you used this new account to ask several questions, many of which show that you still have not learned to use this site properly. This circumvention of the rules and disrespect of the community is not tolerated. We have temporarily suspended your account; you may return after 30 days.  Regards, Aviation Stack Exchange Moderation Team   Anti-Recidivism System Added  [...] We log data on such accounts at time of deletion, which is then referenced should a new account from the same individual be created. If the user was suspended at the time of deletion, then the new account will inherit the remainder of the original suspension. If the user was blocked from posting questions at the time of deletion, then the recreated account will be restricted to posting only one question per week until the quality of their contributions is demonstrated. [...]   I did show high quality in Aviation and this did not affect me.
If you are reading this, you may have been affected by one of our post quality bans. If so, it is important that you  to understand what has happened and how to regain the permissions that you lost. While trying to ask a question, one could see:  We are no longer accepting questions from this account. See  to learn more.  Likewise, for answers:  We are no longer accepting answers from this account. See  to learn more.   Why am I getting this message? Are deleted posts taken into account too? Is a question/answer ban the same as a suspension? How do I avoid getting a question ban? How long do I have to wait before I can post again? What can I do to release the ban? How can I reactivate my account? Can I simply create a new account? I'll just ask somewhere else on the SE network, and they'll migrate my question to the correct site! Will a ban on one Stack Exchange site affect my standing on other sites in the network? Does this apply to meta sites too? My account is in good standing. Why am I still blocked?
Last names that are English words with an extra 'e' I noticed that there are a lot of last names that have an 'e' at the end.  The pronunciation usually isn't changed from that of the base word.   Poole Steele Browne Clarke   Why do English words not have the e?  Maybe the answer to this question depends on which came first, pool or poole. Adding curved features to map with ArcGIS API for JavaScript? I've tried without much success to add a curved line feature to the ArcGIS JavaScript map.    I created a polygon with a curved edge in ArcMap:   However, when I load this same feature in the web API, it becomes segmented:   The problem started when I tried to create a curved feature from the JavaScript API itself, which only seems to allow full circle features (not circular arcs).  This makes me think that curves are still unsupported in the JavaScript API. Do you know any way around this? Do you have any other ideas on alternatives I can use to create and correctly view curved features? There's a problem statement:     For each $m \in \mathbb{N}$, we construct a sequence $m_0$, $m_1$, $m_2,\dots$ denoted $S_m$, recursively via $m_0=m$ and      $$m_{i+1} = m_i + \left\lfloor \sqrt{m_i} \right\rfloor$$      for all $i \ge 0$.   Here, $\lfloor x \rfloor$ is the floor of $x$, the greatest integer less than or equal to $x$.   Hence, we have $\left\lfloor \sqrt{10} \right\rfloor=3$ and $\left\lfloor \sqrt{29} \right\rfloor=5$.      Show that for each positive integer $m$, the sequence $S_m$ contains the square of some integer.   I'm pretty certain that this can be proved with induction. I am just not quite sure what to induct on. Examining examples shows that $S_m$ always results in a perfect square eventually, though I'm not sure how to prove it. When $f(x+1)-f(x)=f'(x)$, what are the solutions for $f(x)$? Why the number of indexed pages decreased for a "site:" search Recently I created a website with hundreds of thousands of unique pages. A week ago, Google had indexed about 250,000 pages. It has now decreased to 90k URLs (using a site:domain.com query).   What should I do to have Google index all the pages again? Why did all these pages get de-indexed from Google?. Restore Python installation to default plus apt package dependencies What is aperture, and how does it affect my photographs? How does aperture affect my photographs?  Why should I care about the aperture with which a photo was taken? What is so special about speed of light in vacuum? I will try to be as explanatory as possible with my question. Please also note that I have done my share of googling and I am looking for simple language preferable with some example so that I can get some insight in this subject.  My question is what is so special about $c$? Why only $c$. Its like chicken and egg puzzle for me. Does Einstein reached to $c$ observing light or does he got to light using some number which turned out equal to $c$.   Why is $c$ not relative. If something has zero rest mass like a photon why they only travel at $c$ in vacuum and not with $c+1$ or $c-1$? We put all of our unit tests in their own projects.  We find that we have to make certain classes public instead of internal just for the unit tests.  Is there anyway to avoid having to do this.  What are the memory implication by making classes public instead of sealed? I have inserted an image in my LaTeX document and the image always displays with the file path of the image directly above it.  How can I prevent this file path from displaying?  I am inserting the image like this:  \begin{figure} \centering     \includegraphics{C:/Users/Name/Pictures/image1.png} \caption{a caption} \label{fig:reference} \end{figure}   Here is a working example of document that produces this behaviour:  \documentclass{article}  \usepackage{graphicx} \begin{document} \begin{figure} \includegraphics{C:/Users/Name/Pictures/image 1.png}  \end{figure}  \end{document}   The image was inserted using the TeXnicCenter Insert>Picture function.  When I generate the pdf document, directly above any image (I have inserted multiple images using this technique) the file path displays above the image, in the case above it would show: "file\path\of\image", how can I prevent this from displaying? How does the Deposit-User work? Elastic IP address on EC2 instance interface without 1:1 NAT I like having my hyperref hyperlinks a different colour, so it's obvious that they are links. But when I print a copy of the PDF, I don't want the links to be coloured, because you can't click them, so it doesn't matter and it's distracting.  Other than just having a separate "for printing" version of the PDF where I turn off the hyperlinks, is there a way to have the printed version come out without the coloured links? Why does the variance of the Random walk increase? How to intuitively understand eigenvalue and eigenvector? I'm learning multivariate analysis and I have learnt linear algebra for two semester when I was a freshman.  Eigenvalue and eigenvector is easy to calculate and the concept is not difficult to understand.I found that there are many application of eigenvalue and eigenvector in multivariate analysis. For example     In principal components, proportion of total population variance due   to kth principal component equal    $$\frac{\lambda_k}{\lambda_1+\lambda_2+...\lambda_k}$$   I think eigenvalue product corresponding eigenvector has same effect as the matrix product eigenvector geometrically.   I think my former understanding may be too naive so that I cannot find the link between eigenvalue and its application in principal components and others.   I know how to induce almost every step form the assumption to the result mathematically. I'd like to know how to intuitively or geometrically understand eigenvalue and eigenvector in the context of multivariate analysis(in linear algebra is also good).  Thank you! The classical book on commutative algebra Introduction to Commutative Algebra, by Atiyah and Macdonald, has the following as exercise I.11.       A ring is Boolean if $x^2=x$ for any $x$ of $A$. In a Boolean ring $A$, show that     i) $2x=0$ for all $x\in A$;    ii) Every prime ideal of $A$ is maximal, and its residue field consists of two elements;   iii) Every finitely generated ideal of $A$ is principal.     I can but solve the first two of them; for the last one, I cannot even perceive the situation here, for it will not, generally speaking, be a Dedekind domain, whereof my knowledge is somewhat more. I have hitherto tried to find one element for each ideal of two generators which can stand the stead of them, and then proceed by induction. But even the first step fails to produce any result. Thanks for any hints and inspirations in advance. How to get the caret column (not pixels) position in a textarea, in characters, from the start? How do you get the caret position in a &lt;textarea&gt; using JavaScript?  For example: This is| a text  This should return 7.  How would you get it to return the strings surrounding the cursor / selection?  E.g.: 'This is', '', ' a text'.  If the word “is” is highlighted, then it would return 'This ', 'is', ' a text'. Python multiprocessing: restrict number of cores used I have a manuscript that is under review in a major journal which is a main result out of a few recent years of my research. When applying for faculty positions, I would like to send the draft as a part of my writing sample. But since the material is not yet published, I am not sure if it is a good idea.  What are the foreseeable disadvantages of sending an article in review to the faculty search committee?  My area is neuroscience / biomedical engineering.  Update: The paper got into a high-profile journal, and I got a job at a different place which did not require a writing sample. Where do I put my systemd unit file?