In these lectures we shall give results about non-isolated singularities of complex algebraic sets. We shall indicate many references to the reader.
We shall try to enunciate the results as clearly as possible. Detailed proofs of the results are not always given, but to complete them will be an excellent exercise for the reader. We hope that these notes will be a lead to students in the maze of the theory of singularity.
These notes follows essentially the lectures given at São Carlos in the school of 2012.