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. SamRoss

    LaTeX 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}...
  2. K

    LaTeX Closest synthetic that is as stretchy as Latex

    Hi I’m working on a prototype idea and think I could greatly simplify one part if I used some sort of tough stretchy rubber. Something that offers good spring-like resistance and a fast rebound. I googled many different combinations of “latex like synthetic” or “stretchy synthetic rubbers”...
  3. PainterGuy

    LaTeX Vertical space and left alignment in Latex

    Hi, How do I left align the text below? Also, how do I create vertical spaces above and below the line stating "Subbing the following expressions..."? Could you please help me with it?To derive 14(ii) m_{0} \gamma^{2} \frac{d^{2} y}{d t^{2}}=e E_{y}^{\prime} from 13(ii) m_{0} \frac{d^{2}...
  4. Eclair_de_XII

    LaTeX Feedback on my LaTeX code please

    \newcommand\func{\(f\)} \newcommand\myset[1][math]{\ifthenelse{\equal{math}{#1}}{\(K\)}{K}} \newcommand\diff[4]{\(|#1-#2|#4#3\)} \newcommand\ball[3]{\diff{#1}{#2}{#3}{<}} \newcommand\Fllab[2]{\diff{f(#1)}{f(#2)}{\epsilon}{\geq}} \newcommand\term[2][n_k]{\({#2}_{#1}\)}...
  5. The Bill

    LaTeX Why is LaTeX development so slow?

    LaTeX is used widely in many disciplines and industries. It has this in common with other open standards which get a lot of development help and support from industry. Yet, we're still stick using a decades old version with packages taped on top that add features that should have been added to...
  6. PainterGuy

    LaTeX How do I fix this generated LaTex code for a matrix?

    Hi, I'm using Scientific Workplace to write LaTex and it generates the code shown below for the given matrix. I don't think the generated code is standard LaTex in this particular instance. How can I fix it without making too many modifications? I mean if there is a simple way to fix it. Thank...
  7. person123

    LaTeX 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...
  8. M

    LaTeX How to decrease spacing before single space environment in LaTeX?

    Hi, Question: How can I remove the extra spacing above the single-space equation environment. I have wrapped the equations in a single-space environment as the document has to be double spaced (and I wanted to save as much space as possible) From reading online, I have the following code at...
  9. yucheng

    LaTeX 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...
  10. epenguin

    LaTeX Latex Guide Interactive: Help Locate Resource

    Within the last year someone posted on a thread, it wasn't the main thread subject I think, a very useful seeming table of Latex which I think was interactive or semi-interactive. I thought note that and didn't and now can't find it. It would be useful to me right now, and think it would be...
  11. Eclair_de_XII

    LaTeX Is there a good compendium of LaTeX exercises?

    Do people who learn LaTeX just practice it on their undergraduate assignments or something?
  12. Haorong Wu

    LaTeX How Do I Remove Navigation Symbols in LaTeX Beamer?

    I do not know which forum I should turn to, so I post it here. If I should post it here, please help me move it. I want to delete those buttons at the bottom just before the footer. They are useless to me. I have googled them. But no relevant information shows up. Maybe I search them with wrong...
  13. rude man

    LaTeX Finding Missing Symbols in LaTeX: An Enhanced Primer

    E very once in a while I see a post in which LaTex symbols appear that are absent from the primer offered in PF. Examples: \bf A in lieu of the awkward \mathbf A ## \ell ## for script l. There must olbviously be a list of the 28 letters that can be scripted. The font section in my LaTex...
  14. mcastillo356

    LaTeX How to change the text color with LaTex

    Isn't it $$\color{red}x\color{black}y$$
  15. WMDhamnekar

    LaTeX Drawing Lewis Diagrams & Chemical Equations with LaTeX

    Hi, How to draw Lewis diagrams, Lewis symbols , chemical equations in LaTeX?
  16. 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...
  17. PainterGuy

    LaTeX How to convert MathML code into LATEX code

    Hi again, I'm trying a new program, Scientific Workplace 6, which let's me produce a zip file with four different options as shown below. I just noticed that I could open these zip files in browser and format of the document remains intact. I only tried "Zip file with MathJax". Do you know...
  18. W

    LaTeX Quality Latex editors for Windows?

    Hi, doing some research for free Latex editors for Windows 10. I did an online search but would like to know the experiences of people with Latex editors, if any. Thanks.
  19. Eclair_de_XII

    LaTeX For an informal presentation, would you use LaTeX to type this out?

    Is it possible to typehttps://drive.google.com/open?id=186OoXjmVjb3nhXjSBKEAq2u_6MF-UXlm into LaTeX, or should I just print out the thing as it is? If the former, I do not know how I would go about it; the matrices seem much too wide for me to fit onto a letter-size page. For the record, the...
  20. S

    LaTeX Solving LaTex errors in the gummi editor

    In the default installation of the gummi editor in Fedora, I find it difficult to locate LaTex errors. If I'm typing along and make a error in LaTex then the preview screen suddenly becomes a window saying no preview can be shown. I don't find the information in the "build tab" helpful. The...
  21. topsquark

    LaTeX Where Can I Learn Advanced LaTeX Codes?

    I thought I'd make a new thread for some snippets of more "advanced" LaTeX codes that are not covered by the basic LaTeX tutorial. For example: \enclose{circle}{x} \enclose{circle}{x} A \overset{u}{=} B A \overset{u}{=} B A \overset{u}{ \rightarrow} B A \overset{u}{ \rightarrow } B A...
  22. opus

    LaTeX Making "tabs" in LaTeX for problem sets

    I'm trying to recreate this document in LaTeX, but I'm not sure how they aligned "Factor" and "Solution" after 1.1.1. Any ideas?
  23. Adesh

    Mathematica Entering mathematical statements using latex

    I have been to other forum sites too where we need to encode a mathematical statement like this ... , some sites use $...$ before and after the mathematical things and some sites like this great forum use [itex]...[itex]. Why it this so? The latex software like Texstudio, Texmaker etc. uses $$...
  24. M

    LaTeX LaTeX editor for outputting pdf equations

    Hi PF! Does anyone know of a LaTeX editor that outputs white equations for powerpoints, etc.? I'm running a Mac, and currently use LaTeXiT, but I can't seem to get this to work for white output.
  25. binbagsss

    LaTeX LaTeX - using the amsmath package doesn't work

    I downloaded the amsmath package and am using the command \usepackage{amsmath} and its not working. I have used it a few years ago, but can't remember whether I had this problem and what the solution was- I think it's something as simple as saving it in the right place if I recall quickly -...
  26. B

    LaTeX I get depressed because of LaTex

    physics Forums is a good place to ask physics questions however i cannot ask any questions because i don't know how to use Latex it seems i need lot of time to learn it... :( :( :(
  27. bob012345

    LaTeX LaTeX doesn't work with Safari?

    I'm having no luck at all generating LaTex. I'm using the Safari web browser on an iPad. Example: \frac a b I can see the LaTex formatting on other posts though. Note to observers; I'm practicing LaTeX in this older message. We start...
  28. B

    LaTeX Why can't I view eqns even after using the tags in latex ?

    Summary: Unable to view equations in proper format Hi I am unable to view equations in proper format even after using latex tags shown in help. For example : \xi = x - vt is shown as typed Again \frac {\partial x} {\partial y} = is shown as typed Please help TIA
  29. Wrichik Basu

    LaTeX Writing Feynman slash notation in LaTeX

    I started reading QFT recently. With respect to the Dirac spinors, I was introduced to Feynman's slash notation: OR There are sites which say how this can be inserted in LaTeX documents. I checked out the LaTeX guide of PF, but found that it is not listed there. Writing...
  30. opus

    LaTeX Help in LaTeX- Continuing text after embedding a picture

    As you can see in my attached picture, I am trying to continue on with my text after my embedded image, but it is putting the text still before the image. I'm not sure why it's doing this because I am writing the text after the \end{figure} command. Any ideas?
  31. karush

    LaTeX How Can You Retrieve and Display Selection Values from a PDF in LaTeX?

    https://documentcloud.adobe.com/link/track?uri=urn%3Aaaid%3Ascds%3AUS%3A4882882a-63fb-4f57-aefe-154f82d8c04e this a pdf of an attempt to produce AP Calculus matching questions on a PDF I am using overleaf thanks much you might have down load the pdf from the browser then open it in Acobat...
  32. SamWedge

    LaTeX Material as thin as a drinking straw and as flexible as a latex tube?

    Hello, I am an artist working on weighted cloth in my practice since 2015. Each piece I make by hand and is extremely time consuming. I would love if someone would take a look at this and give me any thoughts you might have. I am working on a project that requires filling thin, fabric...
  33. Ibix

    LaTeX Write Maths in Forum: LaTeX Guide

    I suggest relabelling the "LaTeX guide" link, which is just below the reply box in threads. I think people who don't know LaTeX already don't necessarily recognise that this tells them how to write maths in the forum. Perhaps "How to write maths in the forum"? Also, the guide isn't linked at...
  34. Charles Link

    LaTeX Latex commands get wiped out when editing

    Hello, I've encountered a problem with the new software in that if I am editing a previous post when someone else replies to a thread, any Latex that I have in that post winds up getting garbled and the Latex removed. This has happened to me perhaps as often as half a dozen times or more...
  35. scottdave

    Mathematica Discover the LaTeX Mobile Decoder on Detexify for Mathematical Symbols

    Somebody on the Slack for one of my online classes shared this interesting mobile website where you can draw a mathematical symbol and get the LaTeX equivalent. http://detexify.kirelabs.org/classify.html
  36. M

    LaTeX Troubleshooting LaTeX Codes with Fraction Line Disappearance

    I cannot determine what the problem is. My latex codes have strange behaviors. This might be related to my PC. Fraction lines are disappearing. What is the problem? When I put reply button then preview it it looks good...
  37. LCKurtz

    LaTeX Latex Tutorial: Easily Accessible Resource for Newbies

    Every time I want to point a newbie to the latex tutorial I have to hunt it down myself. It would be really nice if there was a link or an icon right on the reply window to use in the post. Or am I missing something?
  38. 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.
  39. DrClaude

    LaTeX Proper Use of LaTeX: Common Typographical Errors

    I am writing a document for my students about the proper use of ##\LaTeX##. There are some things that always scorch my eyes, like improper italics [##sin(x)##] or incorrect typography of units [##128kg##]. I wonder those of you who are sticklers for typography have other pet peeves of the...
  40. A

    LaTeX What is the LaTeX code for large brackets and parentheses?

    What is the latex code used in this forum of large bracket (and parenthesis) and subscript and superscript? For example, the below parenthesis is too small: ##(x1 + \frac{1}{\frac{1}{x1}})##
  41. opus

    LaTeX How to format "sub step indentations" in LaTeX

    Please see the attached image for reference. I'm looking for a way to kind of "indent" in my steps to make it clear that I'm working on a subset of a problem. For example in this case, I want to evaluate each integral separately in kind of a sub step to so that everything is not running down in...
  42. J

    LaTeX I want to use LaTeX, How can I do that?

    I want to write LaTeX. So I write e.g) '\left( \frac a b \right)' . But it looks just back space bar not mathematical equation. Does there need to install TeX program if I want to type LaTeX in Physics Forums?
  43. 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: https://tex.stackexchange.com/questions/39149/how-can-we-draw-a-christmas-tree-with-decorations-using-tikz There are a lot of interesting variations posted, maybe PF could have our own contest! Here's...
  44. 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...
  45. A

    LaTeX How to Use LaTEX: Tutorial & Tips

    Can someone tell me how to write latex in this forum? Thanks
  46. I

    LaTeX Writing Notes LaTeX: Benefits vs Handwritten Notes

    I enjoy writing in LaTeX and was wondering if it would be a bad idea if I wrote my notes up in LaTeX. Would I be better off just making handwritten notes for revision? Has anyone tried to revise by writing up concepts/equations in LaTeX and was it more useful than handwriting notes?
  47. cookiemnstr510510

    LaTeX Writing Fractions in LaTeX Easily

    Hello all, So I've been trying to write some basic equations out like 1/2 but would like it to appear in a horizontal fashion (like 1 over 2). I have been reading threads on how to use latex, I've tried to look at others equations, right click and have the latex code shown to me so i can...
  48. 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...
  49. karush

    LaTeX How to Demonstrate Synthetic Division with Latex Efficiently?

    What's the best way to demonstrate Synthetic division with Latex I tried an array but too much open space Mahalo
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