## About meI am a PhD student at the Saarbrücken Graduate School of Computer Science and the Programming Systems Lab. I did my Bachelor's Thesis on formal and constructive computability theory and a Research Immersion Lab on verified extraction from Coq at the chair. I obtained my Master's degree from the University of Cambridge with a thesis on the expressive power of effect handlers and monadic reflection. Currently, we are trying to establish the strong invariance thesis for a certain kind of lambda calculus with the long-term goal of using this calculus as a formal basis for Complexity theory. In order to do so, I am working on a formalisation of Turing machines in Coq. |

**The strong invariance thesis for a lambda-calculus**

*Yannick Forster, Fabian Kunze, Marc Roth*

LOLA 2017, Reykjavik, Iceland, 2017.

**Weak Call-by-Value Lambda Calculus as a Model of Computation in Coq** *(pdf)*

*Yannick Forster and Gert Smolka*

ITP 2017, Brasilia, Brazil, 2017.

** On the Expressive Power of User-Defined Effects: Effect Handlers, Monadic Reflection, Delimited Control**

ICFP 2017, Oxford, 2017.

**Verified Extraction from Coq to a Lambda-Calculus** *(pdf)* *(slides)*

*Yannick Forster and Fabian Kunze*

Coq Workshop 2016, ITP 2016, Nancy, 2016.

**On the expressive power of effect handlers and monadic reflection** *(pdf)*

*Yannick Forster*

Master's Thesis, Robinson College, University of Cambridge, 2016.

**A Formal and Constructive Theory of Computation** *(pdf)*

*Yannick Forster*

Bachelor's Thesis, Programming Systems Lab, Saarland University, 2014.

Edith Heiter, 2017, Bachelor's thesis (in progress)

Undecidability of PCP in Coq, co-supervised with Gert Smolka

Maximilian Wuttke, 2017, Bachelor's thesis (in progress)

Formalising Turing machines in Coq

Summer 2017 | TA Introduction to Computational Logic Core course, Programming Systems Lab. |

Summer 2017 | Advisor Category Theory Seminar, Programming Systems Lab. |

Winter 2016 | Advisor Funktionale Programmierung Proseminar, Programming Systems Lab. |

Summer 2016 | Lecturer, Coach and Organiser Mathematics Precourse Saarland University. |

Summer 2015 | Part of the organisation teamMathematics Precourse Saarland University. |

Winter 2014/2015 | OrganiserDidactic Seminar for Re-exam Student TAs Reactive Systems Group. |

Winter 2014/2015 | Supervision Student TAProgramming 1Basic course, Reactive Systems Group. |

Summer 2014 | Student TAIntroduction to Computational LogicCore course, Programming Systems Lab. |

Winter 2013/2014 | Student TAProgramming 1Basic course, Dependent Systems Group. |

Summer 2013 | Student TAMathematics Precourse Saarland University. |

Mail: | forster at ps.uni-saarland.de |

Adress: | Saarland University, Saarland Informatics Campus E1 3, Rm 523 66123 Saarbrücken |

Phone: | +49 (0)681 / 302-5626 |