# User’s guide¶

Users who already know how picos works can have a look at this summary of all useful operators, function and sets:

Beginners should start with this tutorial:

**Tutorial***Variables**Affine Expressions**Norm of an affine Expression**Quadratic Expressions**Constraints*- Linear (in)equalities
- Groupping constraints
- Removing constraints
- Flow constraints in Graphs
- Quadratic constraints
- Second Order Cone Constraints
- Semidefinite Constraints
- Inequalities involving geometric means
- Inequalities involving real powers or trace of matrix powers
- Inequalities involving generalized p-norm
- Inequalities involving the nth root of a determinant

*Set membership**Write a Problem to a file**Solve a Problem*