15th International Symposium on Functional and Logic Programming (FLOPS 2020)

14-16 September, 2020, Akita, Japan
ACM In-Cooperation



Slides and Videos:
In Program, after each title, you can download the slide and video (if they are allowed by the speaker).
Conference Proceedings:
Functional and Logic Programming, 15th International Symposium, FLOPS 2020, Akita, Japan, September 14–16, 2020, Proceedings, (LNCS, volume 12073)
(If you cannot download PDFs from the above link, please try again with another web browser.)

FLOPS 2020 will be held online on 14-16 September, 2020.


Writing down detailed computational steps is not the only way of programming. The alternative, being used increasingly in practice, is to start by writing down the desired properties of the result. The computational steps are then (semi-)automatically derived from these higher-level specifications. Examples of this declarative style include functional and logic programming, program transformation and re-writing, and extracting programs from proofs of their correctness.

FLOPS aims to bring together practitioners, researchers and implementors of the declarative programming, to discuss mutually interesting results and common problems: theoretical advances, their implementations in language systems and tools, and applications of these systems in practice. The scope includes all aspects of the design, semantics, theory, applications, implementations, and teaching of declarative programming. FLOPS specifically aims to promote cross-fertilization between theory and practice and among different styles of declarative programming.

Previous FLOPS meetings were held at Fuji Susono (1995), Shonan Village (1996), Kyoto (1998), Tsukuba (1999), Tokyo (2001), Aizu (2002), Nara (2004), Fuji Susono (2006), Ise (2008), Sendai (2010), Kobe (2012), Kanazawa (2014), Kochi (2016), and Nagoya (2018).


FLOPS solicits original papers in all areas of the declarative programming:

FLOPS promotes cross-fertilization among different styles of declarative programming. Therefore, submissions must be written to be understandable by the wide audience of declarative programmers and researchers. Submission of system descriptions and declarative pearls are especially encouraged.

Submissions should fall into one of the following categories:

System descriptions and declarative pearls must be explicitly marked as such in the title.

Submissions must be unpublished and not submitted for publication elsewhere. Work that already appeared in unpublished or informally published workshops proceedings may be submitted. See also ACM SIGPLAN Republication Policy.


To participate in FLOPS 2020, please make a registration here.
The talks will be given in a Zoom webinar.
There is no registration fee.
The registration deadline is: Tue, Sep. 8, 2020 (AoE) = Wed, Sep. 9, 2020 at 21:00 (JST).


FLOPS 2020 Program is here.
The timezone of the program is JST (Japan Standard Time) = UTC +9.
(There is no daylight saving time in Japan.)

Invited Talks


The proceedings will be published by Springer International Publishing in the Lecture Notes in Computer Science (LNCS) series, as a printed volume as well as online in the digital library SpringerLink.

Important Dates

29 November 2019 (AoE) 22 November 2019 (AoE) EXTENDED! Submission deadline
31 January 2020 (AoE) 24 January 2020 EXTENDED! Author notification
20 February 2020 16 February 2020 EXTENDED! Camera ready due
14-16 September 2020 23-25 April 2020 RESCHEDULED! FLOPS Symposium


Final Call for Paper (Text)

Submissions must be written in English and can be up to 15 pages excluding references, though system descriptions and pearls are typically shorter. The formatting has to conform to Springer's guidelines. Regular research papers should be supported by proofs and/or experimental results. In case of lack of space, this supporting information should be made accessible otherwise (e.g., a link to an anonymized Web page or an appendix, which does not count towards the page limit). However, it is the responsibility of the authors to guarantee that their paper can be understood and appreciated without referring to this supporting information; reviewers may simply choose not to look at it when writing their review.

FLOPS 2020 will employ a double-blind reviewing process. To facilitate this, submitted papers must adhere to two rules:

  1. author names and institutions must be omitted, and
  2. references to authors' own related work should be in the third person (e.g., not "We build on our previous work …" but rather "We build on the work of …").

The purpose of this process is to help the reviewers come to a judgement about the paper without bias, not to make it impossible for them to discover the authors if they were to try. Nothing should be done in the name of anonymity that weakens the submission or makes the job of reviewing the paper more difficult (e.g., important background references should not be omitted or anonymized). In addition, authors should feel free to disseminate their ideas or draft versions of their paper as they normally would. For instance, authors may post drafts of their papers on the web or give talks on their research ideas.

Papers should be submitted electronically at EasyChair.

Program Committee

Elvira AlbertUniversidad Complutense de Madrid
María AlpuenteUniversitat Politècnica de València
Edwin BradyUniversity of St Andrews
Michael HanusCAU Kiel
Nao HirokawaJAIST
Zhenjiang HuPeking University
John HughesChalmers University of Technology
Kazuhiro InabaGoogle
Shin-Ya KatsumataNational Institute of Informatics
Ekaterina Komendantskaya  Heriot-Watt University
Leonidas LampropoulosUniversity of Pennsylvania
Akimasa MorihataThe University of Tokyo
Shin-Cheng MuAcademia Sinica
Keisuke NakanoTohoku University (co-chair)
Koji NakazawaNagoya University
Enrico PontelliNew Mexico State University
Didier RemyINRIA
Ricardo RochaUniversity of Porto
Konstantinos SagonasUppsala University (co-chair)
Ilya SergeyYale-NUS College
Kohei SuenagaKyoto University
Tachio TerauchiWaseda University
Kazushige TeruiKyoto University
Simon ThompsonUniversity of Kent
Philip WadlerUniversity of Edinburgh
Nicolas WuImperial College London


Keisuke NakanoTohoku University, Japan (PC Co-Chair, General Chair)
Konstantinos Sagonas  Uppsala University, Sweden (PC Co-Chair)
Kazuyuki AsadaTohoku University, Japan (Local Co-Chair)
Ryoma Sin'yaAkita University, Japan (Local Co-Chair)
Katsuhiro UenoTohoku University, Japan (Local Co-Chair)


Japan Society for Software Science and Technology (JSSST), Special Interest Group on Programming and Programming Languages (SIG-PPL)

Tohoku University, Global Webinar Series
Logo of Global Webinar Series

In Cooperation With


Contact Address

FLOPS2020oc [at] googlegroups [dot] com