I didn't see him go there/I didn't see him going there
"Heard me [infinitive]" vs. "heard me [present participle]"
Missing links to responses to comments on nomination posts In the responses tab in my profile, responses to comments on nomination posts include a working link in the page source, but because there's no title the links are empty and useless.    When listed in the inbox such posts do have a title, though in this case the link is to the post and not directly to the comment. (Actually, the links in responses end up being redirected and also go to the post and not to the comment, but they try to go to the comment.)  In Supercollider:    In Global Profile: I am trying to work through Hartshorne's book and while working through one of the exercises, I need to show the following:  Let $k$ be an algebraically closed field. Let $Y \subseteq A^3$ be the set $Y=\{(t,t^2,t^3)\;|\;t \in k\}$. Show that $Y$ is an affine variety.  The rest of the problem I have completed. I'm just not sure how to show that this set is closed and irreducible. I assume that they intend for $A^3$ to have the Zariski topology. Find the equation of the circle passing through two points (4,4) and (-2.-2) with radius 4 I am trying to solve this question but i cannot seem to find the center (h,k). I know i have to use the equation of circle form '(x-h)^2+(x-k)^2=r^2' and after that form to solution of the 2 point given and simultaneous equations them. I got the answer for that which is h+k=2 and that is where i got stuck. Please anyone help me with this. i also post my working as well. How do I get timestamp from e.g. 22-09-2008? Is there a way to recognize destructible environment in XCOM:Enemy Unknown? I have built a forecasting model for a company. Since it is dedicated to practical usage, I prefer to use the relative error parameter (like MAPE, SMAPE, &amp; MASE) as a measurement for my model performance and display it on the dashboard (the percentage error is easier to understand by user). I found an interesting reference about the criteria of a good forecast result based on MAPE from Lewis (1982):  ...but in my case, I can't use MAPE for some dataset because there is some zero actual demand so it can't be used as denominator in MAPE. So, I use SMAPE &amp; MASE instead, but I can't find any good references about good forecast result criteria based on SMAPE &amp; MASE, nothing like above. So, I'd really appreciate any help/suggestion about it :), Thank You! Reference: Lewis, C. D., 1982. Industrial and Business Forecasting Methods. London: Butterworths. Is $A\triangle B := A\cup B-A\cap B $ a suitable definition for the symmetric difference of two sets $A$ and $B?$ Or is $A\triangle B := (A-B) \cup (B-A) $ only allowed? Loading multiple CSV files into QGIS 2.10 How can I load multiple CSV files into QGIS with Longitude/Latitude already included in it. I downloaded the &quot;Load Them All&quot; plug-in, however, the result loaded was converted as text files and cannot be visualize on the map canvass. Any help? Are there any available plug-ins that can load multiple CSV file that will work fine in QGIS? $16$ rooks on a chess board. Place $8$ pairwise non-attacking white rooks and black rooks on a $8\times8$ chess board. If one can swap rows and columns, is it possible for the black rooks to take the initial position of the white rooks and vice versa?  My attempt:  Let the rows be $a_1,a_2,...,a_8$ and columns $b_1,b_2,...,b_8$. If there are white rooks at ($a_i$,$b_j$) and ($a_j$,$b_a$) as well as black rooks at ($a_i$,$b_i$) and ($a_j$,$b_j$), then we can reduce it to a $2\times2$ and a $6\times6$.   I don't know what to do next. Any help appreciated. Cannot get onto Apple Developer Forums Every time I attempt to log on to the apple developer forums it tells me I need to create a new user account (even though I already have one), and when I try to sign up it gives me an error:   Anyone else have this issue and/or know how to fix it? Thanks! I understand test -n &lt;expression&gt; to return false if the expression evaluates to a string length of greater than 0.  Why then does the following happen?  Macbook:~ echo ${#undeclared_variable} 0 Macbook:~ test -n $undeclared_variable &amp;&amp; echo Foo Foo   Bash 4.x  My expectation is that since test -n $undeclared_variable should evaluate false, that Foo should not be echoed.  If I use [[  ]] instead of test, it works as expected. Get OS-level system information I'm currently building a Java app that could end up being run on many different platforms, but primarily variants of Solaris, Linux and Windows.  Has anyone been able to successfully extract information such as the current disk space used, CPU utilisation and memory used in the underlying OS? What about just what the Java app itself is consuming?  Preferrably I'd like to get this information without using JNI. Why am I getting "No such file or directory" when I try to execute a binary? how do i change the color of typeface on photoshop? \texttt overfull hbox problem I asked a question earlier about \verb and overfull hbox :   And regarding the solution there, changed many of my \verbs to \texttt{}s.  I have come up with a new problem now.  An example:  \documentclass {article} \begin{document} \section {Introduction}      The entry point is in \texttt{TRCS.Main()} (\texttt{TRCS\char`\\TRCS.cs}).    The stateless (see \S 3.4.3) forms are started immediately, then another controller   is invoked, namely  \texttt{Workflow}. \end{document}   Compiling this example will show my problem.  \texttt{Workflow} causes an overflow, and a rather significant one.  What should I do to alleviate the problem?  Thanks in advance for your help! "Is the same" or "are the same"? Which is the correct one?     On average, the polyunsaturated fat content in one teaspoon of the olive oil and canola oil is the same        On average, the polyunsaturated fat content in one teaspoon of the olive oil and canola oil are the same Separate Models vs Flags in the same model I have customer data from 2 brands. The data structure are the same, but I expected the customer behaviour to be different in different brand.  So I could train 2 models, 1 for each brand, or I could train one model on both brands, but flag which brand the customers belongs to within the data.  So my question is, would training on both brands with flags be too much more work for the Machine Learning (I'm using neural network), and therefore be harder to achieve good accuracy than to have dedicated models for each brand? Why more (and varying number of) logical reads with read ahead (prefetch)? After creating tpch database in my SQL Server, I tried below query:      set statistics io on     DBCC DROPCLEANBUFFERS;             select top 100 * from dbo.lineitem order by l_partkey;   The table lineitem has a non-clustered index on l_partkey. I issued the above queries for several times and found out that the logical reads vary each time:      Table 'lineitem'. Scan count 1, logical reads 1019, physical reads 4, read-ahead reads 1760, lob logical reads 0, lob physical reads 0, lob read-ahead reads 0.     Table 'lineitem'. Scan count 1, logical reads 1007, physical reads 4, read-ahead reads 1720, lob logical reads 0, lob physical reads 0, lob read-ahead reads 0.     Table 'lineitem'. Scan count 1, logical reads 1030, physical reads 4, read-ahead reads 1792, lob logical reads 0, lob physical reads 0, lob read-ahead reads 0.   From the post here: , I know it could be caused by read ahead behavior.  BUT exactly why read ahead could cause more logical reads? How does it change the SQL Server behavior? Like SQL Server may read more index page since it's in cache anyway?  Anyway, I disabled read ahead and issue the above query again. Now it reports the same amount of logical reads each time. BUT the logical reads is much smaller!!      Table 'lineitem'. Scan count 1, logical reads 404, physical reads 160, read-ahead reads 0, lob logical reads 0, lob physical reads 0, lob read-ahead reads 0.   So my question is, why the read ahead feature could cause many more and various logical reads count?  Out of curiosity, I tried another query without the "order by":      select top 100 * from dbo.lineitem   Here's the result without read ahead:      Table 'lineitem'. Scan count 1, logical reads 5, physical reads 3, read-ahead reads 0, lob logical reads 0, lob physical reads 0, lob read-ahead reads 0.   Here's the result with read ahead:      Table 'lineitem'. Scan count 1, logical reads 15, physical reads 2, read-ahead reads 3416, lob logical reads 0, lob physical reads 0, lob read-ahead reads 0.   The one with read ahead still has more logical reads. So, why? Prove that $x^2 + y^2 = z^4$ has infinitely many solutions with $(x,y,z)=1$.   Do I use the terms $x= r^2 - s^2$, $y = 2rs$, and $z = r^2 + s^2$ to prove this problem?  Thanks for any help. How do I run a Perl script from within a Perl script? I've got a Perl script that needs to execute another Perl script. This second script can be executed directly on the command line, but I need to execute it from within my first program. I'll need to pass it a few parameters that would normally be passed in when it's run standalone (the first script runs periodically, and executes the second script under a certain set of system conditions).  Preliminary Google searches suggest using backticks or a system() call. Are there any other ways to run it? (I'm guessing yes, since it's Perl we're talking about :P ) Which method is preferred if I need to capture output from the invoked program (and, if possible, pipe that output as it executes to stdout as though the second program were invoked directly)?  (Edit: oh, now SO suggests some related questions.  is close, but not exactly the same as what I'm asking. The second program will likely take an hour or more to run (lots of I/O), so I'm not sure a one-off invocation is the right fit for this.)