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Denny Vrandečić

@vrandecic@mas.to

mastodon 4.5.7

Husband. Dad. Cat housemate. PhD. Works on Abstract Wikipedia and Wikifunctions at Wikimedia Foundation. Wikidata founder. Previously: ontologist at Google, Wikimedia Trustee, and RPG author. Roots in Brač, Croatia. Stuttgart, Germany. he/him. Views my own.

Posting cat pics and occasionally other stuff.

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Joined October 30, 2022

Website:

http://denny.vrandecic.com

Wikipedia:

https://en.wikipedia.org/wiki/User:Denny

Linktree:

https://linktr.ee/vrandecic

Wikidata:

https://www.wikidata.org/wiki/Q18618629

Posts

Denny Vrandečić

@vrandecic@mas.to

Husband. Dad. Cat housemate. PhD. Works on Abstract Wikipedia and Wikifunctions at Wikimedia Foundation. Wikidata founder. Previously: ontologist at Google, Wikimedia Trustee, and RPG author. Roots in Brač, Croatia. Stuttgart, Germany. he/him. Views my own. Posting cat pics and occasionally other stuff. # tootfinder

mas.to

Denny Vrandečić

Denny Vrandečić

@vrandecic@mas.to

Husband. Dad. Cat housemate. PhD. Works on Abstract Wikipedia and Wikifunctions at Wikimedia Foundation. Wikidata founder. Previously: ontologist at Google, Wikimedia Trustee, and RPG author. Roots in Brač, Croatia. Stuttgart, Germany. he/him. Views my own. Posting cat pics and occasionally other stuff. # tootfinder

mas.to

@vrandecic@mas.to · 3d ago

Reuters doxxing Banksy Y?

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Denny Vrandečić

@vrandecic@mas.to

Husband. Dad. Cat housemate. PhD. Works on Abstract Wikipedia and Wikifunctions at Wikimedia Foundation. Wikidata founder. Previously: ontologist at Google, Wikimedia Trustee, and RPG author. Roots in Brač, Croatia. Stuttgart, Germany. he/him. Views my own. Posting cat pics and occasionally other stuff. # tootfinder

mas.to

Denny Vrandečić

Denny Vrandečić

@vrandecic@mas.to

Husband. Dad. Cat housemate. PhD. Works on Abstract Wikipedia and Wikifunctions at Wikimedia Foundation. Wikidata founder. Previously: ontologist at Google, Wikimedia Trustee, and RPG author. Roots in Brač, Croatia. Stuttgart, Germany. he/him. Views my own. Posting cat pics and occasionally other stuff. # tootfinder

mas.to

@vrandecic@mas.to · 4d ago

"Research shows that the less you know about AI, the more likely you are to use it."

https://wapo.st/4luy1qI

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Denny Vrandečić

@vrandecic@mas.to

Husband. Dad. Cat housemate. PhD. Works on Abstract Wikipedia and Wikifunctions at Wikimedia Foundation. Wikidata founder. Previously: ontologist at Google, Wikimedia Trustee, and RPG author. Roots in Brač, Croatia. Stuttgart, Germany. he/him. Views my own. Posting cat pics and occasionally other stuff. # tootfinder

mas.to

Denny Vrandečić

Denny Vrandečić

@vrandecic@mas.to

Husband. Dad. Cat housemate. PhD. Works on Abstract Wikipedia and Wikifunctions at Wikimedia Foundation. Wikidata founder. Previously: ontologist at Google, Wikimedia Trustee, and RPG author. Roots in Brač, Croatia. Stuttgart, Germany. he/him. Views my own. Posting cat pics and occasionally other stuff. # tootfinder

mas.to

@vrandecic@mas.to · 4d ago

Livraria Bertrand in Lisbon, founded in 1732, is certified by Guinness to be the oldest, continually running book store in the world.

A quick search reveals: Osiander, founded 1596 in Tübingen. Korn und Berg 1531 in Nürnberg. Beck'sche in Vienna 1724 (but closed since 2018?), Höllrigl 1598 in Salzburg, Orell Füssli 1519 in Zürich, Cambridge University Press (and store?) 1534.

Now some of these started as print shops, but often also sold books. Anyone know a text discussing Guinness decision?

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Denny Vrandečić

@vrandecic@mas.to

Husband. Dad. Cat housemate. PhD. Works on Abstract Wikipedia and Wikifunctions at Wikimedia Foundation. Wikidata founder. Previously: ontologist at Google, Wikimedia Trustee, and RPG author. Roots in Brač, Croatia. Stuttgart, Germany. he/him. Views my own. Posting cat pics and occasionally other stuff. # tootfinder

mas.to

Denny Vrandečić

Denny Vrandečić

@vrandecic@mas.to

Husband. Dad. Cat housemate. PhD. Works on Abstract Wikipedia and Wikifunctions at Wikimedia Foundation. Wikidata founder. Previously: ontologist at Google, Wikimedia Trustee, and RPG author. Roots in Brač, Croatia. Stuttgart, Germany. he/him. Views my own. Posting cat pics and occasionally other stuff. # tootfinder

mas.to

@vrandecic@mas.to · Mar 12, 2026

Wieder mal Neues vom Ballaballa-Balkan gehört, Folge 98 zu Mileva Marić, der ersten Frau Einsteins. Da hieß es, dass es in der kroatischen Wikipedia noch keinen Artikel zu ihr gab. Immerhin das Mal geändert. Den Artikel geschrieben während ich in der ältesten Buchhandlung der Welt sitze, weil mein Flug wegen dem Lufthansastreik verschoben ist.

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Denny Vrandečić

@vrandecic@mas.to

Husband. Dad. Cat housemate. PhD. Works on Abstract Wikipedia and Wikifunctions at Wikimedia Foundation. Wikidata founder. Previously: ontologist at Google, Wikimedia Trustee, and RPG author. Roots in Brač, Croatia. Stuttgart, Germany. he/him. Views my own. Posting cat pics and occasionally other stuff. # tootfinder

mas.to

Denny Vrandečić

Denny Vrandečić

@vrandecic@mas.to

Husband. Dad. Cat housemate. PhD. Works on Abstract Wikipedia and Wikifunctions at Wikimedia Foundation. Wikidata founder. Previously: ontologist at Google, Wikimedia Trustee, and RPG author. Roots in Brač, Croatia. Stuttgart, Germany. he/him. Views my own. Posting cat pics and occasionally other stuff. # tootfinder

mas.to

@vrandecic@mas.to · Mar 06, 2026

The letter E appears 5,173,357,556 times in English Wikipedia.

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Denny Vrandečić

@vrandecic@mas.to

Husband. Dad. Cat housemate. PhD. Works on Abstract Wikipedia and Wikifunctions at Wikimedia Foundation. Wikidata founder. Previously: ontologist at Google, Wikimedia Trustee, and RPG author. Roots in Brač, Croatia. Stuttgart, Germany. he/him. Views my own. Posting cat pics and occasionally other stuff. # tootfinder

mas.to

Denny Vrandečić

Denny Vrandečić

@vrandecic@mas.to

Husband. Dad. Cat housemate. PhD. Works on Abstract Wikipedia and Wikifunctions at Wikimedia Foundation. Wikidata founder. Previously: ontologist at Google, Wikimedia Trustee, and RPG author. Roots in Brač, Croatia. Stuttgart, Germany. he/him. Views my own. Posting cat pics and occasionally other stuff. # tootfinder

mas.to

@vrandecic@mas.to · Feb 26, 2026

"A rose by any other name would smell as sweet" -- not in a world of LLMs, though, because whenever you fine tune the LLM to your task, you have to always consider what it has already learned in the initial pre-training.

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Denny Vrandečić

@vrandecic@mas.to

Husband. Dad. Cat housemate. PhD. Works on Abstract Wikipedia and Wikifunctions at Wikimedia Foundation. Wikidata founder. Previously: ontologist at Google, Wikimedia Trustee, and RPG author. Roots in Brač, Croatia. Stuttgart, Germany. he/him. Views my own. Posting cat pics and occasionally other stuff. # tootfinder

mas.to

Denny Vrandečić

Denny Vrandečić

@vrandecic@mas.to

Husband. Dad. Cat housemate. PhD. Works on Abstract Wikipedia and Wikifunctions at Wikimedia Foundation. Wikidata founder. Previously: ontologist at Google, Wikimedia Trustee, and RPG author. Roots in Brač, Croatia. Stuttgart, Germany. he/him. Views my own. Posting cat pics and occasionally other stuff. # tootfinder

mas.to

@vrandecic@mas.to · Aug 24, 2025

Additions with unique digits: A tale of puzzling and AI

The other day, Markus Krötzsch and I were catching up when one of his kids came in. She told us about a puzzle her math teacher gave her:

How many integer sums are there where the equation uses each digit at most once?

The simplest example is 1+2=3, but 12+47=59 also works. On the other hand, 1+9=10 isn’t a solution because the digit ‘1’ appears twice (in the first number and the sum).

1/19

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Denny Vrandečić

@vrandecic@mas.to

Husband. Dad. Cat housemate. PhD. Works on Abstract Wikipedia and Wikifunctions at Wikimedia Foundation. Wikidata founder. Previously: ontologist at Google, Wikimedia Trustee, and RPG author. Roots in Brač, Croatia. Stuttgart, Germany. he/him. Views my own. Posting cat pics and occasionally other stuff. # tootfinder

mas.to

Denny Vrandečić

Denny Vrandečić

@vrandecic@mas.to

Husband. Dad. Cat housemate. PhD. Works on Abstract Wikipedia and Wikifunctions at Wikimedia Foundation. Wikidata founder. Previously: ontologist at Google, Wikimedia Trustee, and RPG author. Roots in Brač, Croatia. Stuttgart, Germany. he/him. Views my own. Posting cat pics and occasionally other stuff. # tootfinder

mas.to

@vrandecic@mas.to · Jan 08, 2025

I made a meme #wikipedia

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