latex Definition and Topics - 85 Discussions

Latex is a stable dispersion (emulsion) of polymer microparticles in water. Latexes are found in nature, but synthetic latexes are common as well.
Latex as found in nature is a milky fluid found in 10% of all flowering plants (angiosperms). It is a complex emulsion consisting of proteins, alkaloids, starches, sugars, oils, tannins, resins, and gums that coagulate on exposure to air. It is usually exuded after tissue injury. In most plants, latex is white, but some have yellow, orange, or scarlet latex. Since the 17th century, latex has been used as a term for the fluid substance in plants, deriving from the Latin word for "liquid." It serves mainly as defense against herbivorous insects. Latex is not to be confused with plant sap; it is a distinct substance, separately produced, and with separate functions.
The word latex is also used to refer to natural latex rubber, particularly non-vulcanized rubber. Such is the case in products like latex gloves, latex condoms and latex clothing.
Originally, the name given to latex by indigenous Equator tribes who cultivated the rubber tree, Hevea brasiliensis, was "caoutchouc", from the words caa ('tear') and ochu ('tree'), because of the way it is collected.

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  1. SamRoss

    How can I get the RUN button in Visual Studio Code to turn GREEN again?

    I have been using Visual Studio Code for a couple months now and it has been fine. When I want to run some code, there is usually a little green triangle button in the top right corner that I can click on. A few days ago, that triangle turned white only for Python files (it is still green for...
  2. ZFurdzik

    Labelling a point on the x-axis with PGF-TikZ

    I'm confused about wrote a root of function when plotting here graph with pgf-tikz. Any help is welcome.
  3. SamRoss

    Trouble using PythonTex variables in Latex file

    I'm using Visual Studio Code as my text editor. My ultimate goal is to use PythonTex in a Latex file so that I can generate multiple versions of the same worksheet for my class. As a test, I defined a variable myvar = "hi" but I can't get it to render correctly in the pdf when I use \py{myvar}...
  4. person123

    LaTex to Work With Symbolic Expressions

    For many of the problems in my engineering courses (as well as other STEM courses and maybe even in industry), much of the work is in algebraic manipulation of equations. These problems could be solved using by using symbolic expressions in a coding language like MATLAB. However, it is very...
  5. Y

    Why the ##\#\#\#\### but not just?

    I am planning to type my equations in an offline LaTeX editor, simply because it is easier to do. I'll be using LyX. The problem is, it uses ##\#\#\#\###, for single line code, while my editor uses \$\$. Is there any way to overcome this? Am I, seriously, to replace every single \$\$ into...
  6. Moara

    LaTeX Program or platform for figures and diagrams

    When using latex for writing problems in physics, I find it difficult to make diagrams or figures (such as circuits, atwood machines, lenses, ...) so I wonder if anyone has some recommendations of programs or platforms that can make this "drawings" easy, possibly without the necessity of coding...
  7. gbriggs

    Thinnest possible latex wall?

    1/8" ID X 1/64" wall latex tube?
  8. Zack K

    LaTeX Why is Latex pronounced as "Latec"?

    I've always pronounced it as its spell. It seems weird that you pronounce the x as a c/k.
  9. Imager

    LaTeX Math Equation Christmas Tree and Graph

    I posted this link a couple years ago, but just in case you need to draw a Christmas Tree: There are a lot of interesting variations posted, maybe PF could have our own contest! Here's...
  10. George Keeling

    LaTeX Can I make vertical separation of $$ expressions smaller?

    I wrote my first LaTeX like this: ... it was easy to calculate that $$ ê^1=\hat x - \frac { \hat y } {\tan \alpha} $$ and $$ ê^2=\frac { \hat y } {\sin \alpha} $$ where ... Is it possible to make the vertical separation smaller? The first example in the latex primer does not seem to suffer...
  11. K

    LaTeX LaTeX: newline after closing $$

    The support for ##\LaTeX## is great, but there's just one thing I don't like: if I put a newline after the closing \$$ I get too much vertical space after the rendered part. For instance: $$(x_1+\ldots+x_p)^n = \sum_{c_1+\ldots+c_p=n} \frac{n!}{c_1!\cdots c_p!}x_1^{c_1}\cdots x_p^{c_p}$$ As you...
  12. C

    LaTeX Advantages and disadvantages of VIM-LaTeX

    advantages and disadvantages of VIM-LaTeX?
  13. KenJackson

    Can't load MathJax.js

    The web pages at PF include this script, which won't load, so latex is not rendered: When I try to fetch it with curl, I get an error: "Failed to connect to port 443: Connection refused" Am I the only one? Is...
  14. Janosh89

    LaTeX \vec command

    Can anyone help? What is the convention for inserting the vector symbol? I have a draft with -(\vec{2.5})^2 which displays correctly in preview ##-(\vec{2.5})^2\\## why is vec troublesome and underlined in red?? Should I ignore! I realise that I'm not using a variable.
  15. navneet9431

    LaTeX How to type something in ##\LaTeX## in the title itself?

    How can I type for example- ##CH_2## in the title box?(marked in red) Thanks!
  16. S

    LaTeX Split up a horrible equation

    Hi, how do I split up this horrible equation into several lines? given in latex code: \Psi_2=...
  17. Merlin3189

    [Math Processing Error]

    Anyone recognise this problem? When looking at posts with (presumably) Latex formulae, I get [Math Processing Error] instead of the formula. It looks like everyone else can read them ok and even stranger, I sometimes see the formula for a brief moment before it is replaced by the message...
  18. topolosaurus

    LaTeX \newcommand on Physics Forum post

    Hello, this is my first question on Physics Forums and is a question on how to ask questions. I have been using LaTex for a while already. I wanted to post a thread about classical field theory. I tried to use \newcommand just to make easier the typing of expressions such as...
  19. D

    LateX error : ! I can't write on file 'Rapport.pdf'

    Hello, I am trying to compile my lateX document but errors appear: ! I can't write on file 'Rapport.pdf'. Please type another file name for output ! Emergency stop l.55 ... obj {<< /pgfprgb (/Pattern /DeviceRGB] >> ! Fatal error occurred, no output pdf file produced! Transcript written on...
  20. qspeechc

    LaTeX Latex not downloading update packages

    Hello everyone. I'm using Miktex, which is supposed to automatically download packages, and WinShell as a front end, both are latest versions. For some reason packages are not downloading. First the wrapfig.sty file didn't download, so I did it manually by downloading it into the .tex file I'm...
  21. Tukhara

    Confused with LaTex

    I have no clue how to use it. Can someone tell me in a basic way? Also provide links for downloading? Note, I haven't even downloaded it. I recently downloaded MikeTex but have no idea how to start this all out. I need this for writing a research paper.
  22. gelfand

    Asking for advice for how to post questions here

    Hello, forum looks like it has good help and I'm certainly in need of that :S I'm currently working on some pretty basic physics / mechanics stuff, newtonian stuff (up to lorentz transforms) Re the formatting of this place - I was wondering if an appropriate way to ask a question would be to ...
  23. ATY

    LaTeX Align at multiple points

    So, I got the following problem: I want to write my equation the way you can see it in the picture: I am actually running this: \ begin{align} \begin{split} ...... \ end{split} \ end{align} My problem is, that I can not set multiple align points. I need one point to attach the first 4 lines...
  24. doktorwho

    Best app for writing LaTeX

    hi, do you happen to know any app for iOS that can create pdf-s by writing LaTeX. I know of Texpad and Texwriter but dont know if they can create pdf-s from the code you write. Any help?
  25. Imager

    LaTeX Christmas Tree with Latex

    I was looking for something else at Stack Exchange and found a how to draw a Christmas tree with Latex thread. I thought the one by Loop Space was the best!
  26. doktorwho

    How do you draw diagrams on PhysicsForums?

    Instead of uplading a picture, i want to draw a circuit diagram or some kind of a diagram and upload it to PhysicsForums, is there a way to do that?
  27. tesselate

    LaTeX What are the macros you guys use to speed up LaTeX-ing?

    Hello everyone! I was wondering if you guys could suggest some macro-s that you use in your LaTeX preamble, to speed up typing up your homeworks/reports. I think typesetting any report looks very professional, so I don't want to stop LaTeX-ing them. However, it does take a huge chunk of my day...
  28. B

    Studying Where to Learn LaTeX for Mathematics?

    Hello! I am trying to write my notes in mathematics to permanently store my knowledge, and I am trying to learn LaTeX but it is quite difficult for me....Could you recommend me some sources and books to learn LaTeX for mathematics?
  29. Greg Bernhardt

    LaTeX Behind the Math: Peter Krautzberger - Comments

    Greg Bernhardt submitted a new PF Insights post Behind the Math: Peter Krautzberger Continue reading the Original PF Insights Post.
  30. fluidistic

    LaTeX Changing the order of references using bibtex to sequential

    Hi people, I'm having a very hard time to sort the references sequentially in my latex document. Right now my text is displayed as "blabla... [13] blabla.... blabla.... [6]" , so that I get [13] and [6] instead of [1] and [2]. I use bibtex and here's a simplification of the format I use...