### 2 Find the critical point of the function

Maggie.D 14 minutes ago. 0 answers, 0 views calculus multivariable-calculus
Consider the following function. $g(x, y)=e^{−8x^2−6y^2+24y}$ (a) Find the critical point of g. (b) Using your critical point in (a), find the value of D(a, b) from the Second Partials test that is used to classify the critical point. (c) Use the...

### 1 sed: How to add a key/value pair at the end of the section in INI file

chesschi 2 hours 38 minutes ago. 2 answers, 0 views regex bash sed ini
In order to add a key/value pair at the end of the section in INI file, I would like to: Find the match section name and check if next square bracket (i.e. ^[) is available. If so, find the last...

### 3 Computing $n$-th external power of standard simplectic form

Miguel 2 hours 53 minutes ago. 1 answers, 0 views differential-geometry differential-forms
I need some help: Define a 2-form on $R^n$ by $\omega=dx_1\wedge dx_2+dx_3\wedge dx_4+...+dx_{2n-1}\wedge dx_{2n}$. How to compute $\omega^n:=\omega\wedge\omega\wedge\ldots\wedge\omega$?

### How to prove (global) uniqueness of solution to linear, first order ODE?

Martin yesterday at 18:53. 1 answers, 0 views differential-equations
Consider the first order linear ODE $F(x) + A x F'(x) + B = 0$, with initial condition $F(1) = 1$. Moreover, let $A,B \neq 0$, real, and $sgn(A) = sgn(B)$.* *... if the latter matters. Mathematica gives me the...

### Unable to remotely access MySQL

user3402600 yesterday at 15:59. 1 answers, 0 views mysql
I am experiencing problems with mysql 5.1 at the moment and possibly due to that I am unable to connect. The port that I am using for mysql is open (http://www.yougetsignal.com/tools/open-ports/) All of a sudden i was unable to access...

### How to set space in the Title

The Beast yesterday at 09:40. 0 answers, 0 views spacing report setspace

### 2 Is there a reliable way to define the scale label's position in a groupplot in relation to the respective label?

henry yesterday at 09:04. 0 answers, 0 views pgfplots
I was asked to try and put the scale labels for the yticks not right above the north west corner of the plot as it is rather unusual. Personally, I tend to agree. It works easily but above left might...

### 2 Determining the Filter Coefficients of an FIR Filter

Sara Tibbetts yesterday at 08:04. 2 answers, 0 views filters filter-design fir transfer-function
I need to find the filter coefficients of an FIR filter that will block sinusoids of frequency $200\ \rm Hz$ if the sinusoid is sampled at $1.2\ \rm kHz$. I feel like this is a fairly simple problem, but I'm...

### 13 Make Button enabled/disabled depending on the TextBox Text property in WPF?

Mou yesterday at 07:24. 2 answers, 0 views wpf xaml data-binding
I was looking for code through google that enables and disables a button based on the text property from a textbox. If the textbox has some text then the button should be enabled or otherwise button should be disabled. I...

### Undefined control sequence with tikzpicture [duplicate]

Alessandro yesterday at 05:56. 0 answers, 0 views tikz-pgf subfloats tikz-matrix
This question already has an answer here: How can a matrix of nodes be saved into a box? 2 answers tikz matrix undefined control sequence 2 answers I am trying to create a figure showing some matrices and some...

### 2 Matching DateObject with Cases

Suite401 yesterday at 02:58. 0 answers, 0 views pattern-matching filtering date-and-time
OK, here is something that is me missing the obvious. I have an Excel spreadsheet consisting of 2 columns and 5 rows. The first column is formatted in Excel as a dd-mmm-yy date. The second column is a string. I...

### Profile manager pending on some devices

Matthias Pitscher yesterday at 02:45. 1 answers, 0 views apple-id osx-server system-prefs profile-manager
I have this problem that most of the options in the system preferences are greyed out, even when I log in as an admin. But I need to log in to my iCloud account to get some software to run...

### 2 How to identify coordinate system of a point in Guinea?

Joseph Bechara yesterday at 01:44. 0 answers, 0 views coordinate-system latitude-longitude guinea
I need help to identify the coordinate system of the below point in Guinea {"Name":"Simandou", "Latitude":0.29482446877975, "Longitude": 0.08190694324693, "k1":0.22528363047002, "k2":1.4976525821596} I am not able to identify the unit of the Lat and Long but I looked for the Name on...

### 1 Group of distance preserving transformations of the plane is isomorphic to $\mathbb{Z} \ltimes \mathbb{Z}$

Lee Wang yesterday at 01:19. 2 answers, 0 views group-theory finite-groups
"Let $G$ be the group of distance preserving transformations of $\mathbb{R^2}$ which is generated by $(x,y)\mapsto(x+1,y)$and $(x,y)\mapsto(-x,y+1)$. Prove that $G$ is isomorphic to the semidirect product $\mathbb{Z} \ltimes \mathbb{Z}$ where f sends $1$ to the non-trivial automorpism of $\mathbb{Z}$." From...

### 6 Erlang: Best way for a singleton gen_server in erlang cluster?

Rumpelstilz yesterday at 00:20. 2 answers, 0 views erlang global gen-server
Setting: I want to start a unique global registered gen_server process in an erlang cluster. If the process is stopped or the node running it goes down, the process is to be started on one of the other nodes. The...

### 4 Problem with titleformat: Don't want Chapter Style to be Applicable on Table of Contents & Bibliography

Sandeep Singh 11/16/2018 at 23:04. 1 answers, 0 views sectioning formatting titletoc
Please consider the following code: \documentclass[11pt,twoside,openany]{book} \usepackage[svgnames,x11names]{xcolor} \usepackage{wallpaper} \usepackage{changepage} \usepackage[explicit]{titlesec} \usepackage{tikz} \usetikzlibrary{shapes,positioning} \usepackage{lipsum} \usepackage{geometry} \geometry{ paperwidth=216mm, paperheight=303mm, left=23mm, %% or inner=23mm right=18mm, %% or outer=18mm top=23mm, bottom=23mm, headheight=\baselineskip, headsep=7mm, footskip=7mm } %% Command to hold chapter illustration image \newcommand\chapterillustration{} %%...

### 2 Create a custom Identify dialog

James Tomatov 11/16/2018 at 23:04. 1 answers, 0 views arcgis-10.0 arcmap arcobjects polygon c#
How can I check if a point belongs to a polygon? I want to create a custom identify tool with edit option. I am using C# and ArcMap 10. My idea is to click on the polygon (building/park/etc) in ArcMap...

### -3 How do I delete a directory in Centos 7 [duplicate]

John 11/16/2018 at 23:04. 3 answers, 0 views linux centos delete
This question already has an answer here: How do I remove a directory and all its contents? 2 answers I am using Centos as my server OS and in my desktop I have a directory called "john", I need...

### 2 Can you use “outright” with “wrong”?

I do not know whether the usage of outright is correct. Not having found this structure on Google search engine, I'm curious about it.

### 2 Variable battery1 symbol in circuitikz

praveen pathak 11/16/2018 at 21:23. 1 answers, 0 views tikz-pgf circuitikz
Is it possible to produce a variable battery1 sign (battery with one up slanted arrow) in circuitikz? There are options for vR and vL (variable resistor) but not for the battery1. I need it to represent a variable power supply....

### 6 Game tree needs adjustment

Saud 11/16/2018 at 21:21. 2 answers, 0 views tikz-pgf tikz-styles
I've created the following game tree: I want it to look like this and I'm stuck: (Apologize in advance for the ugly drawing!) This is my code: \documentclass[12pt,twoside]{book}%{book} \usepackage[a4paper, hmargin={2.5cm, 2.5cm}, vmargin={2.5cm, 2.5cm},bindingoffset=6mm]{geometry} \usepackage{tikz} \usetikzlibrary{calc} \usepackage[dvipsnames]{xcolor} \begin{document} \newcommand\term[2]{\node[below]at(#1){$#2$};} % \begin{tikzpicture}[font=\footnotesize,edge...

### 14 Aligning a figure and table side by side

Greg Slodkowicz 11/16/2018 at 20:04. 1 answers, 0 views tables subfloats
I would like to place a figure side-by-side with a table, and have both of them aligned to the top. This is what I came up with: \begin{figure} \begin{minipage}[b]{0.65\linewidth} \includegraphics[width=0.9\textwidth]{3_comparative/fig/pic.pdf} \end{minipage} \begin{minipage}[t]{0.35\linewidth} \begin{tabular}{| c | c |} \hline Contrast &...

### 13 Why are bay leaves used whole and then removed rather than crushed up like other spices?

KennyPeanuts 11/16/2018 at 19:39. 1 answers, 938 views spices bay-leaf
Recently when making a 5-bean-stew "kit" my son finely crushed up the bay leaves and added them to the other spices, rather than adding them whole to be removed after cooking. When I pointed out his error, he asked me...

### 62 C# conditional AND (&&) OR (||) precedence

We get into unnecessary coding arguments at my work all-the-time. Today I asked if conditional AND (&&) or OR (||) had higher precedence. One of my coworkers insisted that they had the same precedence, I had doubts, so I looked...

### 6 Why would a rifleman have his bayonet fixed to the rifle in a non-combat situation?

sds 11/16/2018 at 18:49. 2 answers, 589 views world-war-one weapons russian-civil-war
Similar to hand-to-hand blades, I would expect bayonets to be sheathed in a non-combat situation, to avoid damaging/dulling the blade and hurting the people around. However, it appears that (at least) Russian soldiers of the WW1/Civil War era kept their...

This question already has an answer here: Quantum entanglement as practical method of superluminal communication 2 answers From https://www.digitaltrends.com/cool-tech/quantum-radar-stealth-aircraft/ In principle, a quantum radar functions like a regular radar — only that instead of sending out a single beam...

### Find a recurrence to count paths in a directed graph

Suppose we have an unweighted directed graph with vertices numbered as $1...n$ From each vertex $i$ there are edges to $i+1$, $i+2$ and $i+7$. My task is to find a recurrence $f(i,j)$ to compute the number of paths from vertex...

### 2 How to zoom an Ordnance Survey OpenSpace Pro map to make it bigger rather than to show more features

Chris S 11/16/2018 at 18:08. 0 answers, 0 views ordnance-survey zoom os-openspace-api
I'm trialling Ordnance Survey OpenSpace Pro WMS, and I have a basic map showing all the layers I'm going to be licensed for (free ones plus vector map local). This works fine, but I'd like to make the most zoomed...

### 8 An animal that is physically separated into multiple parts

MedwedianPresident 11/16/2018 at 17:36. 6 answers, 655 views science-based biology evolution xenobiology
One of my fictional planets (which is largely terran in nature) is notable for an unique animal. Said animal is a dangerous predator that is notable for several things: It is physically separated into three parts: one "hunter", one "digestor"...

### 3 How to hide object but keep shadow in EEVEE?

This is very easy to do in Cycles, just have to click on the camera checkbox. I cant figure out how to do this in EEVEE. Any help would be appreciated.

### 3 Is there a way for an arcane caster to learn Produce Flame?

Darth Pseudonym 11/16/2018 at 16:43. 5 answers, 601 views dnd-5e spells cantrips
I like the spell produce flame for flavor reasons, but it seems to be available only to Druids. Is there a way for an arcane caster (particularly a wizard or sorcerer) to acquire it in such a way that they...

### 8 Is complex residue related to the word residue?

Benjamin Thoburn 11/16/2018 at 16:20. 3 answers, 166 views complex-analysis
I know little formal math terminology and don't understand much of anything about complex analysis. Also, if this isn't a good starting point for complex integration feel free to say (I'm learning about it partly for Cauchy's residue theorem). My...

### 2 How to Delete All Debug Apex logs

Issac Pal 11/16/2018 at 15:42. 2 answers, 22 views debug-logs
I'm trying to delete the complete Apex debug logs but getting DML operation Delete not allowed on List<ApexLog>. Code: List <Apexlog> loglist = [Select Id from Apexlog]; delete loglist; Please provide an idea to delete complete debug logs in code....

### 6 Question about converting void * to int in C

Frost-Lee 11/16/2018 at 15:20. 3 answers, 142 views c pointers type-conversion pthreads
I'm trying to pick my C skills again. I want to sum a sequence in different threads, each thread would return a pointer of the sum of a part of the sequence. However, when I tried to convert the void*...

### 4 Heinlein works where slide rule is used to calculate navigation in space

James Jenkins 11/16/2018 at 14:21. 2 answers, 114 views robert-a-heinlein
A question on Space.SE; Is it possible to navigate space travel with no computer? got me looking for a list of works where Heinlein solely relied on a slide rule to calculate navigation in space. I came up with The...

### 4 Definition of $T_1$ Space in Kolmogorov-Fomin Introductory Real Analysis book

On page 85 of the book it reads the following definition: Definition 4. Suppose that for each pair of distinct points $x$ and $y$ in a topological space $T$, there is a neighborhood $O_x$ of $x$ and a neighborhood $O_y$...

### 10 What trait / concept can guarantee memsetting an object is well defined?

YSC 11/16/2018 at 13:56. 3 answers, 317 views c++ c++14 metaprogramming sfinae c++20
Let's say I have defined a zero_initialize() function: template<class T> T zero_initialize() { T result; std::memset(&result, 0, sizeof(result)); return result; } // usage: auto data = zero_initialize<Data>(); Calling zero_initialize() for some types would lead to undefined behavior1, 2. I'm currently...

### 5 Maxit negotiations

jafe 11/16/2018 at 13:56. 2 answers, 187 views mathematics story strategy
Your military junta has recently overthrown the government of Malta and taken control of the small island nation. As a way to finance your wise and just dictatorship, you have decided to threaten the European government that you will invoke...

### 6 What Reference-Potential does an Operational Amplifier use as “Ground”-Potential?

Quantumwhisp 11/16/2018 at 13:38. 2 answers, 0 views op-amp ground electric
Wikipedia states on operational amplifiers, that, simply speaking, they provide an output voltage at their output which is the difference of the two input voltages, multiplied by some (very very large) number. Since voltages are just electric potential differences, I'd...

### How to steal money if you have a quantum computer? [on hold]

yaxig 11/16/2018 at 13:25. 2 answers, 102 views reality-check economy quantum finances
I'm writing about whistle blower who discovers that his employer, huge profitable corporation is just a front operation. All their diverse products and services are a sham, and the company is actually making their money from development of a quantum...

### 16 As DM, how do I deal with PCs that expect everything in the game to be relevant to the story?

Joren Vaes 11/16/2018 at 13:10. 4 answers, 1.418 views dungeons-and-dragons roleplaying new-gm story
I've started DMing a new group. We've only had two short, 2hour sessions, and most players are new to DnD. I've been a DM before (though just a dozen or so sessions) but in those cases it was with a...

### 1 What happens if you transfer ether and no miner is running?

Eduardo 11/16/2018 at 12:16. 2 answers, 553 views transactions mining private-blockchain
What happen if I transfer ether from account a to account b on a private chain with just one node and that node is not mining?

### 3 What's the meaning of 'Mut zum Hut'?

Felix579 11/16/2018 at 12:13. 2 answers, 692 views meaning
Original text: Mut zum Hut haben Doria und Chantal. I found that 'Mut' means 'courage', 'Hut' means 'hat'.

### 4 Is liberation possible only through a human birth?

Lotus 11/16/2018 at 12:11. 2 answers, 450 views moksha human birth liberation
In the Gita we see that even after the attainment of any loka one has to come back (as a human being) - Aabrahma bhuvanallokaah (8.16) and Ksheene punye martya lokam vishanti (9.21). It seems therefore that liberation/moksha is possible...

### 3 Short blurb-style wording for “pizza made at the establishment”

Szczepan Hołyszewski 11/16/2018 at 12:01. 6 answers, 1.039 views phrase-requests
A gastronomic establishment that isn't a pizzeria serves pizza they actually make, as opposed to buying premade pizza and just heating it up. How would they emphasize this fact in a short blurb on their website or in an advertisement?...

### 1 Use a list of strings to replace a sql parameter printing the whole file for each replacement

user221826 11/16/2018 at 11:50. 1 answers, 0 views text-processing awk sed sql
I have a txt file with string values in a single column : File.txt A B . . . Z I have a sql script with a variable called 'parameter'. script.sql declare @var varchar(255) set @var = 'parameter' select *...

### 8 How to store methods as function pointers in a map continer?

Ring Zero 11/16/2018 at 11:22. 3 answers, 609 views c++ function pointers
I want to be able to call functions based on the data I read from file. So for each item type, I want to call the desired reader method. I wrote this code, but it does not compile where I...

### 4 Gaseous metals?

Metals form metallic bonds which explain many of their chemical and physical properties. This is most familiar in the solid state but metallic properties are still quite recognizable in the liquid state e.g. mercury and molten iron. However, gaseous metals...

### 1 Restoration project, help needed

James Abbott 11/16/2018 at 11:09. 3 answers, 39 views wheels repair restoration
I've been gifted this frame by a family member and would love to restore it to its former glory. I literally don't know where to start. The brake levers are frozen solid and don't move at all. The gears are...

### 3 Need help scripting with jar files

user2656801 11/16/2018 at 11:00. 1 answers, 0 views bash java
I need to launch 17 .jar files, one at a time, with a 7 second delay in between each. 3 hours later, I need to kill all java processes, but only those running on surge user. 3 hours later I...