Form Developer's Workshop 2026

22 Jun 2026, 10:00 → 26 Jun 2026, 16:00 Europe/Amsterdam

Veltman Centre (Nikhef)

This workshop is an opportunity for developers and users of the FORM computer algebra system to come together and discuss the status of the code and its cutting-edge applications, as well as ideas for future development directions.

This meeting will be held at:

Nikhef, Science Park 105 1098 XG Amsterdam

Room: Veltman Centre, 3rd floor.

Next edition (2027):

Previous editions:

• Liverpool 2025 https://conference.ippp.dur.ac.uk/event/1459/overview
• Zurich 2024 https://indico.cern.ch/event/1386443/
• Madrid 2023 https://indico.ift.uam-csic.es/event/17/

Monday, 22 June

13:30 Coffee and tea

1 Welcome and general information

2 Form v5 update

Speaker: Takahiro Ueda

form-v5.pdf

3 Form sources (I)

Speaker: Jos Vermaseren

one.pdf

15:45 Break

4 Debugging Form

Speakers: Coenraad Marinissen, Joshua Davies (University of Liverpool)

1-test.log-1777-160

1-test.log-1777-161

2-test.log-1777-160

2-test.log-1777-161

bugfix.pdf

debug.pdf

Tuesday, 23 June

5 Documentation, test suite and coverage

Speakers: Coenraad Marinissen, Joshua Davies (University of Liverpool)

coverage.pdf

documentation.pdf

6 FORMapart -- A FORM package and the lessons we learnt writing it

Speaker: Adam Kardos (University of Debrecen)

talk.pdf

10:45 Break

7 Package management for FORM and FORM libraries

Speaker: Vitaly Magerya (CERN)

magerya-packaging-form2026.pdf

12:00 Lunch

8 Open issues

Speaker: Takahiro Ueda

open-issues.pdf

14:30 Break

9 Gong show: present your Form problem

16:00 Drinks

Wednesday, 24 June

10 Form sources (II)

Speaker: Jos Vermaseren

11 History talk: from Schoonschip to Form 5

Speaker: Joshua Davies (University of Liverpool)

schoonschip.pdf

10:45 Break

12 Padics - Form development and ai

Speaker: Coenraad Marinissen

p-adic.pdf

12:00 Lunch

13 IBP reduction in Form

Speaker: Kay Schönwald (University of Zurich)

form_workshop_KS.pdf

14 Hands-on session

Form_Workshop_2026-2.pdf

15:00 Break

15 Hands-on session

Thursday, 25 June

16 Form sources (III)

Speaker: Jos Vermaseren

two.pdf

17 Graph generation with Form

Abstract:
This is ongoing work on a “package” of procedures to utilise the newly built-in graph generator in FORM. The aim is not to provide a fixed framework, but a modular set of tools intended as a foundation for further user-defined extensions.

The current implementation is tailored to DIS coefficient functions, using graph representations to organise intermediate expressions. The procedures include analysis of graph symmetries, identification of vanishing contributions, and optimisation of momentum routings.

Feynman rules are assigned on top of the generated graph structures, providing a direct bridge between combinatorial graph data and algebraic expressions.

In addition, related procedures for iterated integrals that arise naturally in this context are included.

The emphasis is on flexibility and composability rather than a closed workflow, allowing adaptation to a range of perturbative calculations. While complete packages are often useful, they are not particularly advantageous in state-of-the-art computations where case-by-case optimisation is required.

Speaker: Marco Klann

2026-FormDev.pdf

grcc.pdf

10:45 Break

18 ANATAR with Form 5.0: Recent Developments

Speaker: Pooja Mukherjee

FORM_Meeting_2026.pdf

12:00 Lunch

19 Computing Amplitudes and Integrals with FORM

Speaker: Lorenzo Tancredi (TUM)

FORM_Tancredi_25.06.26.pdf

20 Hands-on session

15:00 Break

21 Hands-on session

19:00 Workshop dinner

Friday, 26 June

22 Performance benchmarks for Form

Speaker: Joshua Davies (University of Liverpool)

benchmarking.pdf

23 Parallel scalings

Speaker: Ana Costa-Pereira

10:45 Break

24 Final discussion and next workshop announcement

announcement.pdf

12:00 Lunch