# 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. ** On the **Equation Tools 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:

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

** 4. ** Enter * =*.

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

** 6. ** On the **Equation Tools 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. ** On the **Equation Tools 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/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 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.