Felix Brandt
@felix-brandt.bsky.social
Professor of Computer Science and Mathematics at TUM. Interested in Al, TCS, Social Choice, and Game Theory.
👉 cs.cit.tum.de/dss/brandt
👉 cs.cit.tum.de/dss/brandt
Political scientist Thomas Schwartz (✝ 2024) surely had a great sense of humour when it came to acronyms:
GEneralized Top CHoice Assumption (GETCHA)
Generalized Optimal CHoice Axiom (GOCHA)
SOlution COndition (SOCO)
MUltiSTAge CHoice operation (MUSTACH)
BInary-CHoice property (BICH)
GEneralized Top CHoice Assumption (GETCHA)
Generalized Optimal CHoice Axiom (GOCHA)
SOlution COndition (SOCO)
MUltiSTAge CHoice operation (MUSTACH)
BInary-CHoice property (BICH)
November 16, 2025 at 1:20 AM
Political scientist Thomas Schwartz (✝ 2024) surely had a great sense of humour when it came to acronyms:
GEneralized Top CHoice Assumption (GETCHA)
Generalized Optimal CHoice Axiom (GOCHA)
SOlution COndition (SOCO)
MUltiSTAge CHoice operation (MUSTACH)
BInary-CHoice property (BICH)
GEneralized Top CHoice Assumption (GETCHA)
Generalized Optimal CHoice Axiom (GOCHA)
SOlution COndition (SOCO)
MUltiSTAge CHoice operation (MUSTACH)
BInary-CHoice property (BICH)
Great series of primers on democracy reform that specifically address problems in the US: the electoral college, private fundraising, gerrymandering, unavailability of vote-by-mail, first-past-the-post (plurality), etc.
Don't miss the article about Condorcet voting.
effectivegov.uchicago.edu/primers
Don't miss the article about Condorcet voting.
effectivegov.uchicago.edu/primers
Democracy Reform Primer Series
effectivegov.uchicago.edu
November 15, 2025 at 4:09 PM
Great series of primers on democracy reform that specifically address problems in the US: the electoral college, private fundraising, gerrymandering, unavailability of vote-by-mail, first-past-the-post (plurality), etc.
Don't miss the article about Condorcet voting.
effectivegov.uchicago.edu/primers
Don't miss the article about Condorcet voting.
effectivegov.uchicago.edu/primers
Nice survey on how to vote on divisible resources (such as budget, space, or time)
www.comp.nus.edu.sg/~warut/votin...
www.comp.nus.edu.sg/~warut/votin...
www.comp.nus.edu.sg
November 15, 2025 at 3:25 PM
Nice survey on how to vote on divisible resources (such as budget, space, or time)
www.comp.nus.edu.sg/~warut/votin...
www.comp.nus.edu.sg/~warut/votin...
Interesting German article that proposes using a Condorcet-consistent method for Bundestag elections.
doi.org/10.1515/pwp-...
doi.org/10.1515/pwp-...
Wie sollten wir unseren Bundestag wählen?
Zusammenfassung Bei der Bundestagswahl im Februar 2025 wurde erstmals das von der vormaligen Ampelmehrheit beschlossene Wahlrecht angewendet. Es hatte zum Ziel, den Bundestag zu verkleinern – was auch...
doi.org
November 15, 2025 at 3:20 PM
Interesting German article that proposes using a Condorcet-consistent method for Bundestag elections.
doi.org/10.1515/pwp-...
doi.org/10.1515/pwp-...
AAAI 2026 has received more than 29k submissions. Peer-reviewing is completely broken for AI. It’s not only the well-documented issues, such as self-nominated PC members, mismatched referees, useless reports, fraudulent submissions, low-quality papers, etc.
September 7, 2025 at 4:00 PM
AAAI 2026 has received more than 29k submissions. Peer-reviewing is completely broken for AI. It’s not only the well-documented issues, such as self-nominated PC members, mismatched referees, useless reports, fraudulent submissions, low-quality papers, etc.
Thank you, Lord Vader, for hosting us.
youtu.be/IGpXnDiRia8
youtu.be/IGpXnDiRia8
Trump Hosts Tech CEOs From Meta, Apple, Microsoft, Google And OpenAI At White House | 10 News
YouTube video by 10 News
youtu.be
September 6, 2025 at 10:31 AM
Thank you, Lord Vader, for hosting us.
youtu.be/IGpXnDiRia8
youtu.be/IGpXnDiRia8
Ironically, the biggest obstacle to broader adoption of LLMs seems to be their lack of reliability, a trait that is otherwise characteristic of computers.
Like the worst of us, they just make up facts rather than admit they don’t know. I appreciate anyone who admits they don’t know something.
Like the worst of us, they just make up facts rather than admit they don’t know. I appreciate anyone who admits they don’t know something.
April 23, 2025 at 9:09 PM
Ironically, the biggest obstacle to broader adoption of LLMs seems to be their lack of reliability, a trait that is otherwise characteristic of computers.
Like the worst of us, they just make up facts rather than admit they don’t know. I appreciate anyone who admits they don’t know something.
Like the worst of us, they just make up facts rather than admit they don’t know. I appreciate anyone who admits they don’t know something.
Very impressed by ChatGPT4o's new and improved image generation capabilities.
April 8, 2025 at 12:52 PM
Very impressed by ChatGPT4o's new and improved image generation capabilities.
Really hard to tell April Fool's jokes from genuine news this year.
US regrets that far-right extremist Marine Le Pen is convicted of fraud. Trump abandons money laundering law. Musk pays millions to Wisconsin voters. Innocent father from Maryland accidentally deported to El Salvador mega prison.
US regrets that far-right extremist Marine Le Pen is convicted of fraud. Trump abandons money laundering law. Musk pays millions to Wisconsin voters. Innocent father from Maryland accidentally deported to El Salvador mega prison.
April 1, 2025 at 12:50 PM
Really hard to tell April Fool's jokes from genuine news this year.
US regrets that far-right extremist Marine Le Pen is convicted of fraud. Trump abandons money laundering law. Musk pays millions to Wisconsin voters. Innocent father from Maryland accidentally deported to El Salvador mega prison.
US regrets that far-right extremist Marine Le Pen is convicted of fraud. Trump abandons money laundering law. Musk pays millions to Wisconsin voters. Innocent father from Maryland accidentally deported to El Salvador mega prison.
Happy to see that people in machine learning (ML) are drawing on results from social choice theory. Especially maximal lotteries (ML) are getting some attention because of their robustness against clones. I recently compiled a topical bibliography of my ML papers: www.cs.cit.tum.de/en/dss/brand...
🔆 Maximal Lotteries
www.cs.cit.tum.de
March 21, 2025 at 1:43 PM
Happy to see that people in machine learning (ML) are drawing on results from social choice theory. Especially maximal lotteries (ML) are getting some attention because of their robustness against clones. I recently compiled a topical bibliography of my ML papers: www.cs.cit.tum.de/en/dss/brand...
A Special Issue of Social Choice Welfare on Fair Public Decision Making: Allocating Budgets, Seats, and Probability, edited by Haris Aziz, Edith Elkind, Jérôme Lang, and myself has just appeared.
link.springer.com/journal/355/...
link.springer.com/journal/355/...
Social Choice and Welfare | Volume 64, issue 1
Volume 64, issue 1 articles listing for Social Choice and Welfare
link.springer.com
January 28, 2025 at 9:48 PM
A Special Issue of Social Choice Welfare on Fair Public Decision Making: Allocating Budgets, Seats, and Probability, edited by Haris Aziz, Edith Elkind, Jérôme Lang, and myself has just appeared.
link.springer.com/journal/355/...
link.springer.com/journal/355/...
youtu.be/jWJVMoe7OY0
The fact that all these people have been released from prison epitomizes the absurdity of our times.
It was the largest criminal investigation in U.S. history, with some individuals receiving sentences of up to 22 years.
The fact that all these people have been released from prison epitomizes the absurdity of our times.
It was the largest criminal investigation in U.S. history, with some individuals receiving sentences of up to 22 years.
Day of Rage: How Trump Supporters Took the U.S. Capitol | Visual Investigations
YouTube video by The New York Times
youtu.be
January 27, 2025 at 10:00 PM
youtu.be/jWJVMoe7OY0
The fact that all these people have been released from prison epitomizes the absurdity of our times.
It was the largest criminal investigation in U.S. history, with some individuals receiving sentences of up to 22 years.
The fact that all these people have been released from prison epitomizes the absurdity of our times.
It was the largest criminal investigation in U.S. history, with some individuals receiving sentences of up to 22 years.
In other news, Trump announced he could forcefully turn Canada into the US’ 51st state, doesn't rule out military action to take control of Panama and Greenland, NATO partners need to pay 5% (rather than 2%), and threatens that "all hell will break out" in Middle East.
January 7, 2025 at 10:59 PM
In other news, Trump announced he could forcefully turn Canada into the US’ 51st state, doesn't rule out military action to take control of Panama and Greenland, NATO partners need to pay 5% (rather than 2%), and threatens that "all hell will break out" in Middle East.
"Donald Trump will be suspended from Facebook and Instagram indefinitely and at least until the end of his time in office" (Mark Zuckerberg, 7 Jan 2021).
"We're going to work with President Trump to push back on governments around the world." (Mark Zuckerberg, 7 Jan 2025).
"We're going to work with President Trump to push back on governments around the world." (Mark Zuckerberg, 7 Jan 2025).
January 7, 2025 at 10:41 PM
"Donald Trump will be suspended from Facebook and Instagram indefinitely and at least until the end of his time in office" (Mark Zuckerberg, 7 Jan 2021).
"We're going to work with President Trump to push back on governments around the world." (Mark Zuckerberg, 7 Jan 2025).
"We're going to work with President Trump to push back on governments around the world." (Mark Zuckerberg, 7 Jan 2025).
Best thing about the machine learning hype: academic spam can be identified much easier. Whenever a suspicious email contains DL, ML, or AI, it can be safely deleted.
January 2, 2025 at 4:13 PM
Best thing about the machine learning hype: academic spam can be identified much easier. Whenever a suspicious email contains DL, ML, or AI, it can be safely deleted.
During ski season, there are more Dutch people in the Alps than in the Netherlands.
December 27, 2024 at 12:37 PM
During ski season, there are more Dutch people in the Alps than in the Netherlands.
I think I‘d be more comfortable with microblogging platforms if the character limit was more like 3000 rather than 300 characters.
(Hooray! At least I managed to get across this point within a single message.)
(Hooray! At least I managed to get across this point within a single message.)
December 24, 2024 at 12:01 AM
I think I‘d be more comfortable with microblogging platforms if the character limit was more like 3000 rather than 300 characters.
(Hooray! At least I managed to get across this point within a single message.)
(Hooray! At least I managed to get across this point within a single message.)
Nobody would believe this story if it were fictional: The (literally) richest man in the world buys the largest social media platform in the world and uses it to sway the presidential election of the largest democracy by systematically spreading falsehoods.
December 23, 2024 at 4:20 PM
Nobody would believe this story if it were fictional: The (literally) richest man in the world buys the largest social media platform in the world and uses it to sway the presidential election of the largest democracy by systematically spreading falsehoods.
One year ago, I uploaded the videos from my Computational Social Choice class to YouTube (almost 30 hours). Most of it is non-computational “classic” social choice with a special focus on Condorcet extensions.
t.co/O3KCZQTcLC
t.co/O3KCZQTcLC
https://www.youtube.com/playlist?list=PLOfTMPqb4h4YpejIw7acMsdUnBm51a-FD
t.co
December 1, 2024 at 1:57 PM
One year ago, I uploaded the videos from my Computational Social Choice class to YouTube (almost 30 hours). Most of it is non-computational “classic” social choice with a special focus on Condorcet extensions.
t.co/O3KCZQTcLC
t.co/O3KCZQTcLC
Let p be the proportion of preference profiles that admit a Condorcet winner. If you fix the number of voters n and increase the number of alternatives m, one would expect that p decreases. Similarly, when fixing m and increasing n (by two). Both statements have been open since 1974!
December 1, 2024 at 10:50 AM
Let p be the proportion of preference profiles that admit a Condorcet winner. If you fix the number of voters n and increase the number of alternatives m, one would expect that p decreases. Similarly, when fixing m and increasing n (by two). Both statements have been open since 1974!
I coded a little 3-player Scratch game to get my kids interested in programming. Didn't work out, but they love the game:
t.co/oW9NBsqOwj
t.co/oW9NBsqOwj
November 28, 2024 at 9:55 PM
I coded a little 3-player Scratch game to get my kids interested in programming. Didn't work out, but they love the game:
t.co/oW9NBsqOwj
t.co/oW9NBsqOwj
Peter C. Fishburn published 26 journal papers in 1984. 15 of these are single-authored and include "Foundations of Risk management", "SSB utility theory", "Transfer principles in income distributions", and the REStud paper that introduces maximal lotteries. 🤯
November 26, 2024 at 11:01 PM
Peter C. Fishburn published 26 journal papers in 1984. 15 of these are single-authored and include "Foundations of Risk management", "SSB utility theory", "Transfer principles in income distributions", and the REStud paper that introduces maximal lotteries. 🤯
I’m kicking things off by sharing a few of my older tweets. Hope that's ok.
November 26, 2024 at 10:59 PM
I’m kicking things off by sharing a few of my older tweets. Hope that's ok.
Hello World!
I just moved here because I didn’t want to stay on a social network whose owner pushes his factually incorrect tweets to my phone’s lock screen.
I just moved here because I didn’t want to stay on a social network whose owner pushes his factually incorrect tweets to my phone’s lock screen.
November 24, 2024 at 10:17 PM
Hello World!
I just moved here because I didn’t want to stay on a social network whose owner pushes his factually incorrect tweets to my phone’s lock screen.
I just moved here because I didn’t want to stay on a social network whose owner pushes his factually incorrect tweets to my phone’s lock screen.