## Why does installing wine (for example) require removing 2GB of good packages?

I have a situation where:

sudo apt-get install winetricks

Results in:

The following packages were automatically installed and are no longer required:      aglfn apturl apturl-common asymptote-doc biber ca-certificates-java catdoc cdparanoia cdrskin cmake-data context      ...  Use 'sudo apt autoremove' to remove them.  The following additional packages will be installed:      fonts-wine libwine-development wine-development wine64-development  Suggested packages:      ttf-mscorefonts-installer winbind playonlinux wine-binfmt dosbox libwine-gecko-2.47 wine64-development-preloader aria2 tor  Recommended packages:      libcapi20-3 libodbc1 libosmesa6 wine32-development  The following packages will be REMOVED      appmenu-qt asymptote cdrdao chromium-codecs-ffmpeg-extra clang clang-6.0 cmake cmake-qt-gui compiz compiz-gnome dvd+rw-tools      eog evince firefox g++-5 g++-5-multilib g++-9 gcc-5 gcc-5-multilib gcc-9 gcj-5-jre-lib gfortran-5 gnome-sudoku      ...  After this operation, 2,032 MB disk space will be freed.  Do you want to continue? [Y/n]

Why? I don’t understand why installing winetricks would possibly cause g++-9 and spotify-client (and 2GB of utterly essential applications) to be deleted. Can I not use these packages simultaneously?

EDIT: It has even deleted my ubuntu-desktop and nautilus

I am on 18.04

## Example 4.1.9 Right shift Turing Machine from Elements of the Theory of Computation by Papadimitriou Page 190

I tried to trace this machine with an example but failed to conclude that the machine is really a right shift machine.

I tried to create a right shift machine.

Which one is wrong and what did I miss?

## is there an archive if old ubuntu files? Example file: rootfs-ubuntu-12.10-0.8.0.tar.lzma

goo.im and rabids.org is dead however is there a mirror for old files from 2012????

[X-FORUM-POST] I posted in the ltt forum aswell regarding somewhat same topic, but a different question. https://linustechtips.com/main/topic/1110045-where-did-gooim-and-rabidsorg-go/

(tagged as nvdia due to tf700t having a tegra)

## Give an example of a connected graph where α(G) =100 and β(G) = 200

So I need to find a form of a graph such that its vertex cover is twice that of its matching, but I am running into problems brainstorming, I know K3 is of this form, but not one at such a magnitude.

## What is an example of a (simple) tail recursive algorithm that doesn’t use a helper function?

I know one can compute things using tail recursion with helper functions like:

let sum_helper n accumulator = match n with | 0 -> accumulator | _ -> sum_helper (n-1) (accumulator+n-1);;  let sum_tail n = sum_helper n accumulator 0;;  sum_tail 3;;

which gives:

# sum_tail 3;; - : int = 3

but I wanted an example of something that didn’t use a helper function (idk if the above can be made without a helper function).

Ideally something simple so to understand the concept better since I’m trapped into thinking all tail recursions look like that.

## Concrete example of Vertex Cover to Subset Sum reduction

In Computational Intractability, we often come across a need to reduce Vertex Cover (VC) problem to a Subset Sum problem, mostly to prove Subset Sum is NP-Complete. I also see a reduction in the line of – A graph G has VC of size k if and only if there is a subset S that sums exactly to t. However, not able to find out (understand) exactly what is this t. I think providing a concrete example will help many like me. Request any one to provide a concrete graph with |VC| 3 or something manageable, and then show exact value of t i.e. what would be the exact instance of subset sum problem. Finally, explaining/clearly mentioning elements of S would be of great help.

## How racial class mechanics actually works? On half-giant example

For example, i want to be half-giant. It’s a racial class from the d&d 3.5 Complete Psionics handbook. I pick it as a race? right? But i get my racial abilities by taking level. So, when i take a level, i get both racial AND class level, according to special leveling table, right? For example 1 level Half-giant 1 level Priest 2 level Half-giant 1 level Priest 3 level Half-giant 2 level Priest 4 level Half-giant 3 level Priest 5 level Half-giant 4 level Priest

And last question, may i just use all racial abilities from start, like a LA+1 character?

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## SPService GetListItems with CAML : can’t get the example to work with status giving error

I am new to SPServices and trying start with example GetListItems. Below is my code

\$  (document).ready(function() {      GetTasks(); });  function GetTasks() {      var method = "GetListItems";     var list = "Tasks";     var fieldsToRead ="<ViewFields><FieldRef Name='Title'/></ViewFields>";     var query ="<Query><Where><Eq><FieldRef Name='ID'/><Value Type='Counter'>1</Value></Eq></Where></Query>";             \$  ().SPServices({             operation: method,             async: false,               listName: list,             CAMLViewFields: fieldsToRead,                completefunc: function (xData, Status) {                      debugger;                     \$  (xData.responseXML).find("z\:row").each(function() {                          alert("hello");                         var name = (\$  (this).attr("ows_Title"));                     });                                 }     }); }

The debugger in the completefunc is hit but when I check the status of function(xData, status) the status returns “error”.And after this alert("hello") does not hit.

What is that I am doing wrong in this ?

## Example of a locally trivial semigroup

I was having a look at the block product principle for finite monoids. I wanted to see the derivation of LTT = Acom$$*$$LI, using an example. But I can’t come up with a non-trivial example of a monoid in LI. Any help is appreciated.