# 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* presentation:

** 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 script enter * F*
and in the lower right box of 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, you can right-click in it and in the popup menu in the **Insert** list, choose what and
how you want to increase:

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

In the * Linear* presentation:

** 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 an equal
symbol, 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/[email protected](-E_x)/c&0&-B_z&[email protected](-E_y)/c&B_z&0&[email protected](-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 special symbol, this linear formula transformed to the 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.