Correctness by Multiplication CORCON Workshop

24-27 2021 March, Genoa, Italy

Important deadlines

13 February 2021 Abstracts of Contributed Papers
20 February 2021 Notification of Acceptance
27 February 2021 Early Registration: Reduced Fee
13 March 2021 Registration Closed


Correctness by Multiplication (CORCON) is an FP7 EU-funded project under the Marie Curie IRSES schema. This workshop aims at bringing together the participants and those researchers who are interested in the themes of the project.


The main themes of the project and the workshop are as follows:

Further info

The workshop is also kindly sponsored by AILA (Associazione Italiana di Logica e sue Applicazioni), IC-EATCS (Italian Chapter of the European Association for Theoretical Computer Science) and the Italian national research project Logical Methods of Information Management.


Downloadable programme (pdf) :

24 March 2021

08.00 Building opens
09.00-09.30 Registration and Opening
09.30-10.15 Giovanni Sambin, On the so-called axiom of unique choice
10.15-10.45 Coffee break
10.45-11.30 Maria Emilia Maietti, Computation by Multiplication in the Minimalist Foundation
11.30-12.15 Helmut Schwichtenberg, Realizability
12.15-14.30 Lunch break
14.30-15.15 Iosif Petrakis, Limit spaces with approximations
15.15-16.00 Monika Seisenberger, Program extraction with infinite data
16.00-16.30 Coffee break
16.30-17.15 Mizuhito Ogawa, Satisfiability of arithmetic constraints and its applications on verification
19.00 Building closes

25 March 2021

08.45-09.30 Satoshi Tojo, Who knows what at which time? – from viewpoint of dynamic epistemic logic
09.30-10.15 Hideki Tsuiki, Dyadic subbases derived from dynamical systems
10.15-10.45 Coffee break
10.45-11.30 Katsuhiko Sano, Topological semantics for Visser’s propositional logics
11.30-12.15 Gianluigi Bellin and Alessandro Menti, Bi-intuitionism as dialogue chirality
12.15-14.30 Lunch break
14.30-15.15 Gyesik Lee, The big five systems of reverse mathematics and their computational interpretation
15.15-16.00 Keita Yokoyama, The strength of Ramsey’s theorem from several different view points
16.00-16.30 Coffee break
16.30-17.15 Sam Sanders, Higher-order reverse mathematics of Brouwer’s continuity theorem and related principles
17.15-18.15 CORCON General Project Meeting

26 March 2021

08.45-09.30 Neil Ghani, Parametricity – what’s it all about
09.30-10.15 Michael Rathjen, Indefiniteness of mathematical problems?
10.15-10.45 Coffee break
10.45-11.30 Takako Nemoto, Interpretation of set theory into theory of operators
11.30-12.15 Takayuki Kihara, Arboreal forcings over admissible sets
12.15-14.30 Lunch break
14.30-15.15 Hajime Ishihara, A monad in the combinatory algebras
15.15-16.00 Francesco Ciraulo, Positivity relations and localic suplattices
16.00-16.30 Coffee break
16.30-17.15 Dieter Spreen, Information frames and L-domains
17.15-18.15 CORCON Work Packages Meetings (20 min for each WP)
Relating Core Logical Systems
Topology and Analysis; Reverse Mathematics
Types and Categories; Programming Languages
20.00 Conference Dinner

27 March 2021

08.45-09.30 Hannes Diener, BD-N
09.30-10.15 Tatsuji Kawai, Point-free characterisation of Bishop compact metric spaces
10.15-10.45 Coffee break
10.45-11.30 Olaf Beyersdorff, How difficult is it to verify proofs?
11.30-12.15 Marco Benini, Does programming really need data structures?
12.15-14.30 Lunch break
14.30-15.15 Eugenio Moggi, Categories for collection types
15.15-16.00 Giuseppe Rosolini, Frames as equilogical spaces


Please register as soon as possible, in any case before 14 March 2021, by sending a message to with Subject your “Name-Surname” and the following information

Title (e.g. Mr, Mrs, Prof,…)
Email (if different from the one used for sending the message)
URL of you web page (optional)
Expected Date of Arrival (optional)
Expected Date of Departure (optional)
Additional Information (optional, e.g. dietary restrictions)
If you cannot attach to the message a receipt (in pdf format) of the bank transfer for the payment of the registration fee, you should send a second message, with the same subject, as soon as you have the receipt (see below for further details).


The fee include only coffee breaks (lunches and dinner are not included)

100€ to be paid before 14 March 2021. Before the same date, a copy of the receipt of payment must be sent to the e-address OR faxed to +390103536699.
60€ for participants who send the copy of the receipt of payment before Friday, 28 February 2021.


The registration must be paid by bank transfer to

UNIVERSITA’ DEGLI STUDI DI GENOVA Dipartimento di Matematica – DIMA via Dodecaneso 35 16146 Genova

IBAN: IT11B0617501472000000534690
The bank details, in case they are needed, are

BANCA CARIGE S.p.A. Agenzia 41 – Via G. D’Annunzio 39 16121 GENOVA

Please make sure to specify that the reason for payment is DIMA – CORCON2021 – “write your surname here” Make sure to check the list of participants to see if your details have been received correctly. In case the fees that your bank charges for the order are very high, please check with us if on-site payment is possible.


List of participants ordered by Surname

Name Surname Affiliation Country
Gianluigi Bellin Univ. of Verona Italy
Marco Benini Univ. of Insubria Italy
Olaf Beyersdorff Univ. of Leeds United Kingdom
Francesco Ciraulo Univ. of Padua Italy
Hannes Diener Univ. of Siegen Germany
Jacopo Emmenegger Univ. of Siena Italy
Neil Ghani Univ. of Strathclyde United Kingdom
Enrico Ghiorzi Univ. of Cambridge United Kingdom
Stefano Gogioso Univ. of Oxford United Kingdom
Hajime Ishihara JAIST Japan
Tatsuji Kawai JAIST Japan
Takayuki Kihara JAIST Japan
SunYoung Kim Yonsei University South Korea
Gyesik Lee Hankyong National University South Korea
Junguk Lee Yonsei University South Korea
Maria Emilia Maietti Univ. of Padua Italy
Samuele Maschio Univ. of Padua Italy
Alessandro Menti Univ. of Verona Italy
Eugenio Moggi Univ. of Genoa Italy
Takako Nemoto JAIST Japan
Mizuhito Ogawa JAIST Japan
Ruggero Pagnan Univ. of Genoa Italy
Erik Palmgren Stockholm University Sweden
Iosif Petrakis Univ. of Munich Germany
Michael Rathjen Univ. of Leeds United Kingdom
Giuseppe Rosolini Univ. of Genoa Italy
Giovanni Sambin Univ. of Padua Italy
Sam Sanders Ghent University Belgium
Katsuhiko Sano JAIST Japan
Peter Schuster Univ. of Leeds United Kingdom
Helmut Schwichtenberg LMU Munich Germany
Monika Seisenberger Swansea University United Kingdom
Dieter Spreen Univ. of Siegen Germany
John Stell Univ. of Leeds United Kingdom
Kazuyuki Tanaka Tohoku University Japan
Satoshi Tojo JAIST Japan
Hideki Tsuiki Kyoto University Japan
Keita Yokoyama JAIST Japan
Keisuke Yoshii Tohoku University Japan


DIMA, via Dodecaneso 35, 16146 Genova. All sessions take place in room 704 on the 7th floor (the main entrance is located on the 6th floor). Internet access is available via eduroam in most parts of the building.

The Department of Mathematics (DIMA) is at via Dodecaneso 35, 16146 Genova, in the area called Valletta Puggia not far from corso Europa which is the main road which runs through the eastern part of Genoa, from the town centre to Nervi. The Department is open on weekdays, from 8am to 7pm.


The hotels which offer special accommodation to visitors of the University are the following:

Hotel * address area single double
Capannina 3 via Speri 7 Albaro €55.00 €75.00
Il Giardino di Albaro 3 via De Gaspari 19 Albaro €89.00 €110.00
Brignole 3 vico Corallo 22 Brignole €57.00 €67.00
Astoria 3 piazza Brignole 4 Brignole €80.00 €105.00
Starhotel President 4 corte Lambruschini 4 Brignole €90.00 €110.00
Moderno Verdi 4 piazza Verdi 5 Brignole €90.00 €125.00

The Department of Mathematics is in the area called Albaro. It can be reached on foot in 25-30 minutes from the hotels in that area; it can be reached by bus (and a short climb) in 15-20 minutes from Brignole.


There are regular buses from the main stations Brignole and Principe. We strongly recommend, if possible, to get off the train at Brignole.

Outside Stazione Brignole, buses which go to Corso Gastaldi are 16, 17, 45, 85, 86 ,87. All stop at the platform marked Bus: levante away from the station. You have to get off bus 17 near Ospedale San Martino. It is easy to recognize when you are on corso Gastaldi because it is a very large road which climbs up and has railroad tracks on its left. It ends just after the tracks disappear. At that point you may ring the bell to request the bus stops. On the right you may notice the following big signs in succession: “COOP” in red, “OPEL” in yellow. Walk back along the road for some 50 meters, then on your left take the steps of Salita Papigliano. Cross the first road you meet (Via San Martino). Climb up along Via Papigliano, to reach Via Padre Semeria, a small lane enclosed by high walls. You see a small gate in front of you: go through it and walk the metal bridge. When you are to take the steps down, you see the main entrance to DIMA, the Departments of Mathematics. However if you are on bus 45, 85, 86, or 87, note that the bus leaves Corso Gastaldi and enters Via San Martino. You should get off at the second stop on Via San Martino (when crossing via Papigliano). Then follow the instructions above.

From Stazione Principe, take a train to Genova Brignole (a bus ticket allows to ride trains within the town) and then take a bus (see instructions above). By train, it takes about 10 minutes to go from Principe to Brignole.

From the centre of town (Piazza De Ferrari), take bus 44 from Via Dante. After some 15 minutes, the route climbs a hill and the bus rides a bus lane in the middle of the road: it is Corso Gastaldi. Now follow the instructions above.

You can buy bus tickets at tobacconists’, newagents’, at ticket counters outside the main train stations. A ticket is valid for 100 mins. on buses, metro, and trains in the metropolitan area, e.g. from Principe to Brignole.

Arriving by train

There are many fast trains from Milano Centrale to Genova Principe (some of these continue to Brignole), approximately one every hour. An InterCity train leaves every other hour from 9.10 to 19.10. There are also many fast trains from Pisa Centrale to Brignole as well as from Torino Porta Nuova.

Arriving by car

If you arrive by car at Genoa on one of the motorways, you should take the exit of Genova Nervi, on motorway A12, Genova-Livorno. If you are on another motorway, follow the directions for A12 Livorno. From the exit follow the directions for CENTRO. They will take you very soon on Corso Europa. You must turn left on via Corridoni, the first allowed left turn on corso Gastaldi which just continues corso Europa after passing Ospedale San Martino. You may spot a sign on the left directing to the Facoltà di Ingegneria. After a few bends, the road becomes via Monte Zovetto, then via Perosio, and enters piazza Leonardo da Vinci. Turn left in the square, pass the first traffic light and get into via Boselli, left again at the next traffic light, and left once more into via Pisa. Finally take the second right into via Flora, this continues into via Dodecaneso. The entrance to the site is after the street narrows, and DIMA is at the far end of the building.

Arriving by plane

The line Volabus is the fast bus between the airport “C. Colombo” and the centre. The ticket costs 6€ and one can ride on any other bus with it for another hour. From the airport, Volabus reaches Stazione Piazza Principe (often erroneously called Porta Principe), the central Piazza De Ferrari, and Stazione Brignole. A taxi ride from the airport to the area near DIMA is about 28€.

Call for Papers

Abstracts in PDF, at most one page including references, can only be
submitted via EasyChair.

In addition to contributions from members of the project sites, there
will also be room for a few contributions by people from outside the

Important Deadlines

13 February 2021 Abstracts of Contributed Papers
20 February 2021 Notification of Acceptance
27 February 2021 Early Registration: Reduced Fee
13 March 2021 Registration Closed

Keynote Speakers


Organisers (alphabetical order):