Update index.md commented the number of participants

Author: luigiapetre

content/post/tutorials/index.md

@@ -74,7 +74,7 @@ To that end, Gustavo takes the students from specifications to automatic code ge
 
 Initially, he taught a combination of Z and CSP# due to the local curriculum requirement on concurrency. Despite engaging the students with several software platforms (PAT for CSP# concurrent models verification, CZT for typing Z schemas/programs and Z-Eves for proving), the feedback pointed out the weakness of Z-related tools, in addition to the loose connection between the two formalisms. Building on this initial phase, Gustavo continued with teaching a combination of Event-B and CSP<sub>M</sub>, attracting positive feedback on the Event-B related software tools, such as Rodin, ProB and B Motion Studio. The last and current phase consists in teaching only B, due to several developments: the possibility to drop the mandatory concurrency requirement and the recent availability of a B Massive Open Online Course (MOOC). The latter development allowed for changing from a classical teaching format to a flipped classroom, where students are required to follow the MOOC course and then implement in a laboratory the various exercises and projects, with teacher support. The feedback from students changed to an appreciation of the employed software tools (Atelier-B, ProB, B Motion Web and VS Code) together with the integrated nature of the course, since some of the projects involve code generation in C with embedding in various platforms of interest for students.
 
-The volume of the presented courses ranges to about 25 students, which is rather impressive, considering the volume of the particular student intakes (50 students starting every semester), the advanced nature of the modules hosting the courses, as well as the optional quality of the course in the most recent curriculum.
+[The volume of the presented courses ranges to about 25 students, which is rather impressive, considering the volume of the particular student intakes (50 students starting every semester), the advanced nature of the modules hosting the courses, as well as the optional quality of the course in the most recent curriculum.]: #
 
 A constant observation students provided - throughout the three phases - is the scarcity of the community working in all these formalisms. Thus, in contrast with - for instance - programming languages, where one can find a remarkable body of resources, for B and related topics the existing materials and community are not very large. Coming back to the motivation cited by Gustavo, it seems that making such a course mandatory for all students would be a very important factor. We maybe simply need to reorganise and make available widely the numerous examples of advantageous use of Formal Methods.