# 2.1 The basics

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This module provides a basic user's guide to Connexions' MathML editor. In it you will learn how to access the editor, how to create, edit, and delete MathML expressions using the editor, and how to insert the MathML code into a module.

## Overview

This module covers some basic points of Connexions' MathML editor, now in beta testing. It is organized as a tutorial and will lead you through basic usage of the editor, though you can skip around the sections if you wish. The tutorial covers:

• how to access and use the editor
• how to create MathML expressions
• how to navigate through the structure of an expression
• how to edit expressions
• how to insert expressions created in the editor into a module
• how to delete expressions
• how to use the menu buttons to create and edit expressions

You will learn how to create the expression $ax^{2}+bx+c$ using keyboard input and also using the toolbar menus .

You will also learn about the basic layout of the MathML editor, the context of your cursor within the editing area, and how to select or highlight part or all of the MathML within the editor with key strokes or the mouse.

All of these aspects of the editor and more are covered in more detail in the MathML Editor: Manual .

## Accessing the editor

Currently, the MathML editor is only supported in Mozilla Firefox . If you use Internet Explorer or another browser, you can download Firefox for free under the link.

When editing a module using Mozilla's Firefox browser, click on an element within the module to open a blue editing box .

On the top-right hand side of the box is a "MathML Editor" link which will open up the editor .

The popup window can remain open while editing a module and can even stay open while editing several modules. At any point one can close the window, but the contents of the editor will be lost.

The editor has two main sections: the toolbar and the main editing area .

The toolbar consists of

• a Menu containing mathematical operators
• buttons for Undo/Redo
• a Preview button, which will display the math as it will look in a published module
• and a View Source button, which displays the raw MathML code

The editing area is the main area for creating math. It begins empty, but math can be pasted directly in here from Connexions, or created on the spot by either typing in expressions or using the toolbars. See the section Inserting expressions into a module below for how to move math from Connexions to the math editor and back.

## Creating expressions

When you first open the MathML editor, the Editing area should have one blank box in it, called a " block ". A block is an empty slot that can be filled with a number, variable, or longer expression consisting of at least one operator and its associated arguments.

Click inside of it to place your cursor inside the empty block.

There are two ways to insert math using the keyboard. The simplest way is to use keyboard shorthand notations for operators. These exist for simple algebra notations, and are similar to the buttons on a calculator (for instance, * for multiplication, - for negative or minus). A full list of Keyboard shortcuts is located here .

do you think it's worthwhile in the long term to study the effects and possibilities of nanotechnology on viral treatment?
absolutely yes
Daniel
how to know photocatalytic properties of tio2 nanoparticles...what to do now
it is a goid question and i want to know the answer as well
Maciej
Abigail
Do somebody tell me a best nano engineering book for beginners?
what is fullerene does it is used to make bukky balls
are you nano engineer ?
s.
fullerene is a bucky ball aka Carbon 60 molecule. It was name by the architect Fuller. He design the geodesic dome. it resembles a soccer ball.
Tarell
what is the actual application of fullerenes nowadays?
Damian
That is a great question Damian. best way to answer that question is to Google it. there are hundreds of applications for buck minister fullerenes, from medical to aerospace. you can also find plenty of research papers that will give you great detail on the potential applications of fullerenes.
Tarell
what is the Synthesis, properties,and applications of carbon nano chemistry
Mostly, they use nano carbon for electronics and for materials to be strengthened.
Virgil
is Bucky paper clear?
CYNTHIA
so some one know about replacing silicon atom with phosphorous in semiconductors device?
Yeah, it is a pain to say the least. You basically have to heat the substarte up to around 1000 degrees celcius then pass phosphene gas over top of it, which is explosive and toxic by the way, under very low pressure.
Harper
Do you know which machine is used to that process?
s.
how to fabricate graphene ink ?
for screen printed electrodes ?
SUYASH
What is lattice structure?
of graphene you mean?
Ebrahim
or in general
Ebrahim
in general
s.
Graphene has a hexagonal structure
tahir
On having this app for quite a bit time, Haven't realised there's a chat room in it.
Cied
what is biological synthesis of nanoparticles
what's the easiest and fastest way to the synthesize AgNP?
China
Cied
types of nano material
I start with an easy one. carbon nanotubes woven into a long filament like a string
Porter
many many of nanotubes
Porter
what is the k.e before it land
Yasmin
what is the function of carbon nanotubes?
Cesar
I'm interested in nanotube
Uday
what is nanomaterials​ and their applications of sensors.
what is nano technology
what is system testing?
preparation of nanomaterial
Yes, Nanotechnology has a very fast field of applications and their is always something new to do with it...
what is system testing
what is the application of nanotechnology?
Stotaw
In this morden time nanotechnology used in many field . 1-Electronics-manufacturad IC ,RAM,MRAM,solar panel etc 2-Helth and Medical-Nanomedicine,Drug Dilivery for cancer treatment etc 3- Atomobile -MEMS, Coating on car etc. and may other field for details you can check at Google
Azam
anybody can imagine what will be happen after 100 years from now in nano tech world
Prasenjit
after 100 year this will be not nanotechnology maybe this technology name will be change . maybe aftet 100 year . we work on electron lable practically about its properties and behaviour by the different instruments
Azam
name doesn't matter , whatever it will be change... I'm taking about effect on circumstances of the microscopic world
Prasenjit
how hard could it be to apply nanotechnology against viral infections such HIV or Ebola?
Damian
silver nanoparticles could handle the job?
Damian
not now but maybe in future only AgNP maybe any other nanomaterials
Azam
Hello
Uday
I'm interested in Nanotube
Uday
this technology will not going on for the long time , so I'm thinking about femtotechnology 10^-15
Prasenjit
how did you get the value of 2000N.What calculations are needed to arrive at it
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