Latex Definition and 999 Threads

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. C

    LaTeX Advantages and disadvantages of VIM-LaTeX

    advantages and disadvantages of VIM-LaTeX?
  2. jim mcnamara

    LaTeX Handling Latex Issues in Equilibrium Constant Calculations | Physics Forums

    @Charles Link was answering a question but ran into a latex issue - an HTML-like command inside latex did not seem to work: https://www.physicsforums.com/threads/equilibrium-constant.956429/#post-6064045 see post #2. What is the correct way to handle this?
  3. F

    LaTeX Loading LaTeX Packages: What Do I Need?

    Is it difficult to load additional LaTeX packages? I'm asking because I recently missed St Mary Road: \usepackage{ stmaryrd } I'm not quite sure where it has to happen, server or client side or both, however, my tex editor has it. I'm not so sure whether the browser needs additional modifications.
  4. phinds

    LaTeX How to Display LaTeX in Firefox 61.0?

    In this thread https://www.physicsforums.com/threads/circuit-problem-involving-sources-and-resistors.950932/#post-6022243 things looked weird to me and I thought it was the poster's fault but now I see in other threads that there are weird strings of characters which I take to be Latex. I've...
  5. KenJackson

    LaTeX Troubleshooting MathJax.js Load Error on PF Website

    The web pages at PF include this script, which won't load, so latex is not rendered: https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.4/MathJax.js When I try to fetch it with curl, I get an error: "Failed to connect to cdnjs.cloudfare.com port 443: Connection refused" Am I the only one? Is...
  6. M

    LaTeX How can I keep Latex expressions on the same line?

    When I use Latex, the expression always comes out on a separate line. How do I keep the expression on the same line?
  7. rude man

    LaTeX Practice Writing LaTeX - Learn How to Write, Review, Edit

    What's the best way to "practice" writing latex text? I'd like to write, revew, edit, write etc. before posting in a forum or in Insight. Or, can the latex compiler be downloaded?
  8. binbagsss

    LaTeX Long Division in LaTeX: How to Write Each Line

    How do you write each line of long division in LaTeX on here ? Thanks
  9. Chestermiller

    LaTeX Make Greek Letters Bold in LaTeX

    How do I make Greek letters boldface in LaTeX? When I try \mathbf{}, I just get the regular non-bold Greek letter.
  10. Tunalover

    LaTeX Discover LaTex & MathJax for Writing Math Expressions

    Until this forum I had never heard of LaTex for writing mathematical expressions. Can anyone help me: A. find out where to download these programs. B. find someone who would be willing to provide guidance on installing and using these programs C. find LaTex and MathJax primers I can print...
  11. Math Amateur

    LaTeX Latex Troubleshoot: Sizing \mid Signs

    In a recent post on the Analysis Forum I tried the following Latex code in order to size the \mid signs ...\left\mid \frac{f_j ( a + h ) - f_j (a)}{ h } - x_j \right\mid^2 \le \| \frac{ f( a + h ) - f(a) }{ h } - ( x_1, \ ... \ ... \ , x_m ) \|^2 The code failed ... but why?Can someone...
  12. K

    LaTeX Latex Editor Gone? Find Out What Happened

    Good Morning, I don't see latex editor or latex equation inserting tool on the editing page any more, that's when I am creating a thread. Has any this changed ? Thank you
  13. Math Amateur

    LaTeX Latex Code for One Set Minus Another .... .... A\B .... ....

    Recently I posted the following text on the Analysis forum ..." ... ... In order to demonstrate that K is closed, we prove that \mathbb{R}^n\K is open. Indeed, choose y \notin K and define O_j = \{ x \in \mathbb{R}^n \ \mid \ \mid \mid x - y \mid \mid \gt \frac{1}{j} \} for j \in \mathbb{N}...
  14. B

    LaTeX How Do I Insert an Excel Graph into LaTeX?

    Let me preface this by saying I am reasonably intelligent overall, but I'm a complete idiot when it comes to computers and technology. I've been trying for hours to put a graph onto LaTeX for a physics labs, but I'm getting nowhere and very frustrated. I've tried to follow guides online, but...
  15. Janosh89

    LaTeX "Trouble with Vector Symbols in Drafts - What to do?"

    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.
  16. 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!
  17. Math Amateur

    LaTeX Latex Code for a Parenthesis ....

    In a recent post on the Cauchy-Schwarz Inequality I wished to "size" the parentheses adequately in the expression x = \frac{ \langle x, y \rangle }{ \mid \mid y \mid \mid^2} y + ( x - \frac{ \langle x, y \rangle }{ \mid \mid y \mid \mid^2} y ) ... ... but in order to use \left and \right I...
  18. S

    LaTeX How can I split up a long and complicated equation in LaTeX?

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

    LaTeX Math Processing Error: Solve the Mystery

    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...
  20. F

    LaTeX Latex article template question

    I am new to Latex and looking for a specific journal article template. I am working on a mac and just downloaded the MacTeX-2017 Distribution which come with its editor. When writing an article in Latex, do figures always need to placed in a separate folder? The article journal template I...
  21. D

    LaTeX Sample problems; Simple Limit (Epsilon - Delta proofs) Latex code included

    Remember to use the appropriate packages; these are in similar post if a mod wants to add the link if you choose to use Latex. Here is the PDF \begin{document} \begin{center} {\LARGE Epsilon-Delta Proofs \\[0.25em] Practice} \\[1em] {\large Just for practice, don't use Google to cheat!}...
  22. M

    LaTeX How Do I Convert Plain Text to LaTeX?

    Solve the equation for x. x^3 + y = z^2 How do I use the QUICK LATEX box to convert this equation in LaTex form?
  23. D

    LaTeX Why Analyze Sensitivity in Omnivory Models?

    \chapter{Sensitivity Analysis} The first step in our method to obtain the sensitivity of each parameter value is to differentiate the right hand side of each model with respect to each model parameter. The partial derivatives for the right hand side of our linear response model...
  24. D

    LaTeX LaTex definitions (very common ones) which are very simple to use.

    Feel free to test out the code. I use these nearly anytime I load up a new file in LaTex. They are very simple and easy to use versus typing out the full latex command. \usepackage{amsmath} \usepackage{amssymb} \usepackage{amsthm} \newtheorem{definition}{Definition}...
  25. M

    LaTeX Help with page dimensions in latex

    Hi PF! I am using a template I've used a long time for presentations but after I updated my machine (and consequently latex) the output I now get is tall and thin, acceptable for papers but not for presentations. I tried messing with the dimensions on line 9 right under \documentclass, where it...
  26. Math Amateur

    LaTeX Help with my post - Latex Error ....

    I have just completed a post in the Analysis Forum ... but unfortunately the post cntains a Latex eroor and I cannot determine what it is ... The Latex expression that is the problem is \left\lvert \int_a^b \lvert \gamma^' (t) \rvert \ dt - \sum_{ k = 1 }^m \lvert \gamma^' ( \tau_k ) \rvert...
  27. PainterGuy

    LaTeX Share Latex Code Easily: Tips and Tricks

    Hi I use Scientific Workplace to write down math equations and also to create documents involving mathematics and to do calculations. Although most people use it for writing science articles, I've found it extremely helpful for whatever little bit of mathematics I do. I face a problem when I...
  28. L

    Can I Use Latex Syntax for Exercise Corrections?

    Hello everybody. My name's Laurent and I'm new in this forum. I wanted to say that the book "The theoretical minimum" by Leonard Susskind and George Hrabovsky is very good for students, amateurs or professionals. For talking about corrections of exercises, can I use Latex in this forum ? If yes...
  29. epenguin

    LaTeX How to label equations in Latex?

    I just want to label equations in a post I could make in the next hours if I knew. Done 'by hand' it is always ugly. I don't want anything fancy, stuff on the web is too fancy and useful for people writing books, I just want to put numbers on a handful of equations I don't need to give them...
  30. M

    LaTeX Printing Code from Python in Latex via "minted"

    Hi PF! I am trying to import code written in Python into Latex via the "minted" package. However, I am getting the error: Package minted error: you must invoke latex with the -shell-escape flag. I tried googling help but I can't figure it out. I'm using Python 2.7 on mac OSX sierra. Any help...
  31. 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...
  32. D

    LaTeX 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...
  33. 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...
  34. qspeechc

    LaTeX Publishing: LibreOffice or Latex?

    Firstly, sorry I didn't know where was the correct place to put this. I'd like to know from publishers or published authors etc. I've just started writing a textbook on school maths. Preferrably I would like to use LibreOffice, but I could use Latex too. Do publishers prefer Latex, or would...
  35. Tukhara

    LaTeX Learn LaTeX Basics: Download Links & Tutorials

    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.
  36. Pushoam

    LaTeX Plain latex code not working in Physics forum

    I have written a solution of problem in LYX. I exported the lyx code as latex plain code. I opened the latex plain code in Tex studio and copied it and pasted it in Physics forum and it didn't work. Can anyone please tell me what should I do? Should I again type the latex code here i.e.Physics...
  37. Ghost117

    LaTeX Does any forum platform come equipped with LaTeX?

    Hi all, I want to create a private online forum for a small team of project members, and we will require LaTeX. I've been trying to google options, but most forum platforms do not seem to support LaTeX 'out of the box.' (Or at least I can't seem to find any that do... ) If anyone here is aware...
  38. M

    LaTeX Why can't I use A(sub)b(/sub) with LaTeX delimiters?

    I try to write volume calculation equation in latex using both multiplication and deltat which is producted with velocity and quarter square of diameter to calculate volume. Vvolume=Vvelocity$$\frac{diamter^2}{4}\deltat$$ Would you please explain what is wrong with the code? Thank you.
  39. M

    LaTeX Efficient Fractional Latex Code for Simplifying Equations

    How can this code be coded by another way? ## \frac {300-270.1}{T-130}## = ## \frac {313.-270.1}{135-130}## And it is also very strange that the right side O.K but left side is not but everything is the same for left and right. #,# \frac {300-270.1}{T-130}## = ## \frac...
  40. M

    LaTeX How does rendering work in web development?

    "You must put special delimiters at the beginning and end of your LaTeX code, in order for MathJax to recognize it and process it. If you want the equation to appear inline with the surrounding text, put # # before and after it. If you want the equation to stand alone in a separate "paragraph"...
  41. S

    LaTeX Making Tables in LaTeX - 2017 Update

    Is there a way to do tables in the forum implementation of Latex? ( I asked this question in 2012 and the "tabular" environment wasn't implemented.)
  42. M

    LaTeX Mastering Bold Writing in Latex to Using Number Signs for Emphasis

    Would you please explain #: number sign shortly ns 1. How can I put a two-word phrase into bold type using number sign? I try to demonstrate it with using name of sign instead of sign itself. nsns I come nsns Above will appear as ## I come ## but I want it seem properly, abstract and all...
  43. gelfand

    LaTeX 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 ...
  44. teroenza

    LaTeX Prevent Latex from Including the Location of Every Citation

    I'm using Zotero to export my Bibtex file (references.bib), and including it with: \addcontentsline{toc}{chapter}{\bibsecname} \renewcommand{\bibname}{\bibsecname} \bibliographystyle{plain} \bibliography{references} For some reason, in the final References section, it is including a chapter...
  45. Math Amateur

    LaTeX Latex Symbol: "Does Not Divide"

    Can someone help me with the Latex symbol/code for "does not divide"? Peter
  46. ATY

    LaTeX Align Multiple Points: A LaTeX Problem

    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...
  47. S

    LaTeX Where is the how-to-use Latex thread?

    Where is the current location of the how-to-use latex sticky thread? Would it make sense to put this thread in the section on latex and math software? Or is it already in that section and I just don't see it?
  48. doktorwho

    LaTeX Top iOS App for Creating PDFs with LaTeX | Texpad & Texwriter Alternatives

    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?
  49. Imager

    LaTeX Learn How to Draw a Christmas Tree with Latex | Stack Exchange

    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! http://tex.stackexchange.com/questions/39149/how-can-we-draw-a-christmas-tree-with-decorations-using-tikz
  50. M

    LaTeX Embedded fonts from LaTex to PDF

    Hi PF! I am submitting a pdf and am generating it in LaTex, specifically I'm using TeXShop. Instructions on submission say: "Ensure that all fonts are embedded in the PDF file and that only Type 1 or TrueType fonts are used. In addition, any offeror who creates files using TeX or LaTeX is...
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