Latex Definition and 91 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. PhysicsRock

    LaTeX formatting Feynman Diagrams incorrectly

    I've been trying to get Feynman Diagrams to work in my LaTeX code, however, the output is not what it is supposed to be. I'm using TeXMaker and TikZ-Feynman to draw the diagrams. My code looks like this: \feynmandiagram [horizontal=a to b] { i1 -- [fermion] a -- [fermion] i2, a -- [photon] b...
  2. benorin

    LaTeX Need editor for dvi files to convert latex

    I have only my iPhone rn to manipulate files with rn. I need assitence from someone with a latex editor capable of viewing .dvi files to download this linked file (the latest draft of our insight) on my google drive...
  3. I

    LaTeX Preview button not working as expected

    When I create a thread and enter all Latex equations, I want to see how it would appear before posting the thread. So, when I click Preview button, I do not see the compiled thread. I have to reload the browser tab to see the Latex output. Are other people seeing this problem ? Thanks
  4. Falgun

    Computational Resources for learning LaTEX

    Okay so I find myself with quite a bit of time on my hands and I have always been a messy note taker so I decided to learn LaTEX just for the heck of it. I searched for previous threads but they were generally confusing. I have very minimum programming experience. So I would really appreciate it...
  5. Llukis

    Customize a template in Latex

    Hello to everybody! I would like to know if someone could help me customizing the title page (adding information as well as logos) of the template of the kaobook class by Federico Marotta. It is available at the website of Latex templates. Has anyone ever used it? Thank you so much.
  6. Z

    Bug Issue with Latex Equations: I have a screen recording of the problem

    My posts all include many equations written in Latex. It seems to me like there are a few bugs related to usage of Latex specifically when just starting a new thread. I've made a short 2 minute screen recording to show the issue I face every single time I want to start a new thread, and the way...
  7. 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...
  8. 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.
  9. 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}...
  10. 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...
  11. yucheng

    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...
  12. 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...
  13. gbriggs

    Thinnest possible latex wall?

    1/8" ID X 1/64" wall latex tube?
  14. 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.
  15. 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...
  16. 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...
  17. 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...
  18. C

    LaTeX Advantages and disadvantages of VIM-LaTeX

    advantages and disadvantages of VIM-LaTeX?
  19. 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...
  20. 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 realize that I'm not using a variable.
  21. 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!
  22. 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=...
  23. 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...
  24. 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...
  25. 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...
  26. 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...
  27. 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.
  28. 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 ...
  29. 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 to...
  30. 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 don't know if they can create pdf-s from the code you write. Any help?
  31. 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!
  32. 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?
  33. 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...
  34. 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?
  35. 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.
  36. 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...
  37. andrewkirk

    LaTeX Latex is now defaulting to non-italic

    I've just noticed that, since I last used it (two weeks ago), Latex has started rendering alphabetic characters in formulas as non-italic, which is non-standard, and doesn't look as good. See for example my post in this thread.
  38. Stephanus

    LaTeX Latex, PF Insights

    Dear PF Forum, I use Google Chrome Version 43.0.2357.130 m My browser doesn't display LaTex in PF Insights. But it display latex on PF Forum other area. Forum and conversation but not in PF Insights. Even in chat window my browser display LaTex, but a mentor told me that typing latex in chat...
  39. B

    Learning LaTeX and Note-Taking

    Dear Physics Forum advisers and friends, I am a college junior with major in the mathematics and an aspiring mathematician in the theoretical computer science. Recently, I got very interested in the LaTeX as it seems that it is widely used in the mathematics (research papers, homework, etc.)...
  40. C

    LaTeX Bibliography in Latex, already part done manually

    Problem: After more than half of my thesis I was advised to use Latex. At this moment I'm learning it, so far looks doable. However, there is a problem of bibliography... yes, mostly manually formatted as it is supposed to look like in output file... I'd like to use Bibtex... but wouldn't it...
  41. C

    LaTeX Mathematical software: Latex, Mathml, MathType, Maple?

    Which mathematical software(s) can you recommend for 1. As a substitute for a calculator (TI89): making basic graphs, regressions (linear, exponential), vectors, solving equations, showing graphs in 2d and 3d? 2. Writing an ebook with lot's of math. I'm thinking Mathml or Mathtype might be...
  42. M

    Gas in a semi permeable membrane - one for the gas experts

    I believe I know the answer to this question; I need an expert to verify it for me. I work for a company that makes latex balloons. The people that have been here for a long time insist that if one is putting a small (5" balloon) filled with helium inside a larger (30") balloon then one must...
  43. M

    Small number theory problem

    Homework Statement This is a problem I had as a margin note in an old notebook that I will recycle. I want write it using LaTeX. Problem is that I also want to write it using "proper" math notation instead of English words. Firstly, I got this: \textrm{Proof that }\nexists x, y \in...
  44. C

    Latex : Making a Histogram

    Homework Statement Hi, I need to create a histogram in Latex. I know how to do this, however, I only know how to do it if I have a limited number of points so I want it so that I can get a computer program to generate a list of numbers and save them to a file and then I can import this to Latex...
  45. M

    LaTeX Concept and subject of latex and its usage and related questions on latex

    Hi, I have newly encountered with a subject called LaTeX. I try to learn it. I know it is a document preparation program. Can I install on my PC and start to use it like Matlab? For example where can I use this code? Thank you.
  46. schrodingerscat11

    LaTeX Recommended LaTex Editors

    Hi! What is your recommended LaTex Editor? Thanks everyone! :)
  47. D

    LaTeX LaTeX in PowerPoint

    I have PowerPoint 2011 for Mac. Is there an easy way to add equations, etc. into my slides?
  48. E

    LaTeX PDF Audio Presentation

    Hello all, I have created a PDF presentation using LateX. I want to add my commentary on the slides by recording my explanation using a mic and mark some parts of the slides while I am commenting, at least to be able to point where I want using the cursor. How can I do that? Thanks
  49. mesa

    LaTeX How do I make a Complex 'C' in Latex for sets?

    Hello all, I was wondering how to make that nice looking Complex 'C' when writing a set in Latex. For example, $$\{k\in C\mid k>0\}$$ looks okay but can be better.
  50. kq6up

    LaTeX Drawing Software?

    Is there a widely used free drawing program that is used in conjunction with LaTeX for math books and physics text? Thanks, Chris