# How to insert an equation with matrix

**Electromagnetic tensor**.

Do the following (how to add an equation in your document, see Working with Microsoft Equation):

## In the **Professional** format:

** 1. ** Create your own equation.

** 2. ** Under **Equation Tools**, on the **Design** tab,
in the **Structures** group, click the **Script** button:

In the **Script** list, choose **Subscript**:

** 3. ** In the base box of the script, enter * F*,
and then in the lower right box of the script:

- Under
**Equation Tools**, on the**Design**tab, in the**Symbols**group, click the**More**button: - In the list of symbols, choose and then .

** 4. ** Enter * =*.

** 5. ** Under **Equation Tools**, on the **Design** tab,
in the **Structures** group, click the **Bracket** button. In the **Bracket** list, choose
round brackets:

** 6. ** Under **Equation Tools**, on the **Design** tab,
in the **Structures** group, click the **Matrix** button. In the **Matrix** list choose
**2x2 Empty Matrix** or **3x3 Empty Matrix**:

** 7. ** To increase a count of columns or/and rows of your matrix:

- right-click in it,
- in the
**Insert**list of the popup menu, choose what and how you want to increase:

** 8. ** Enter in some positions **zero**, for other
positions use **Subscript** and **Fraction**:

## In the **Linear** format:

** 1. ** In your own equation, enter * F_*.

** 2. ** Under **Equation Tools**, on the **Design** tab,
in the **Symbols** group, choose (or * \alpha*) and then (or

*).*

**\beta**
** 3. ** Enter * =*. Then you enter a symbol equal, this
linear formula transformed to the professional format:

** 4. ** In the brackets, enter the following:

* (\matrix(0&E_x/c&E_y/c&E_z/c@(-E_x)/c&0&-B_z&B_y@(-E_y)/c&B_z&0&-B_x@(-E_z)/c&-B_y&B_x&0))*;

where * \matrix* is a command to create a matrix,

*divides elements to columns in one row,*

**&***divides rows in the matrix. Every time then you enter a special symbol, this linear formula transformed into a professional format.*

**@**
* Note*: You can change spaces and alignment of your matrix, for more details see
Adjusting spacing and
alignment in an equation.

See also how to create other types of equations.

See also this tip in French: Comment insérer une équation avec une matrice.