Aldo Tragni

Aldo Tragni invented the following systems:

• Distributed Voting (DV): currently the most supported by him for single-winner and multi-winners system, with proportional ratings.
• FAIR-Max: currently the most supported by him for single-winner system, with approval ratings.
• PSV: currently the most supported by him for multi-winners system, with approval ratings.
• PRO-V
• WIRV
• Tragni's method (and variants)
• Distributed 2-Voting (D2V)
• Distributed Multi-Voting (DMV)

He defined:

• Symbolic voting systems
• Proportional vote philosophy
• Honesty criterion
• IWA
• Independence of least/most preferred
• MV Norm
• nV Norm
• mdM norm, Mdm norm, mM-do-Mm norm

He has made:

• This site (beta version), where it's possible to create surveys that use Distributed Voting with range [0,9] for single and multi-winners.
• This Codepen Application (beta version, fork from this), with which it is possible to insert ballots and view the single-winner with various voting systems.

He also contributed to some voting systems, creating the following diagrams that explain the procedure in a simple way:

• DV Procedure
• D2V Procedure
• FAIR-Max Procedure
• RRV Procedure
• SDV Procedure
• SSS Procedure
• DMV Procedure

Other diagrams:

• DV digital ballot