Claudio Sacerdoti Dept. of Computer Science University of Bologna Towards an Hypertextual Electronic Library of Formal Mathematical knowledge The HELM project is meant to integrate the current tools for the automation of formal reasoning and the mechanization of mathematics (proof assistants and logical frameworks) with the most recent technologies for the development of web applications and electronic publishing. The final aim is the developments of a suitable technology for the creation, maintenance and fruition of a virtual, distributed, hypertextual library of formal mathematical knowledge.