Tabla de Contenidos:
  • 1. Introduction 2. Quadratic words 3. Quadratic exponential equations and $\mathcal {L}$-genus 4. Resolutions of quadratic equations 5. Decision problems 6. Pictures 7. Corridors 8. Angle assignment 9. Curvature 10. Configurations $C$ 11. Configurations $D$ 12. Final angle adjustment 13. Isoperimetry 14. Proof of Theorem 5.9.