Sebastian Ullrich
@kha.functional.cafe.ap.brid.gy
makes Lean at Lean FRO
Munich, Germany
[bridged from https://functional.cafe/@kha on the fediverse by https://fed.brid.gy/ ]
Munich, Germany
[bridged from https://functional.cafe/@kha on the fediverse by https://fed.brid.gy/ ]
Mengen, Leere
November 9, 2025 at 11:46 AM
Mengen, Leere
Going to the museum to critique the artist's code
November 2, 2025 at 3:48 PM
Going to the museum to critique the artist's code
Gonna store all my jewelry in Hilbert's Hotel going forward
October 31, 2025 at 10:28 AM
Gonna store all my jewelry in Hilbert's Hotel going forward
Easy reproducer
October 21, 2025 at 11:36 AM
Easy reproducer
Anything can look serene if you crop out all the people around it
October 19, 2025 at 4:09 PM
Anything can look serene if you crop out all the people around it
For a second I was convinced Mathlib had a file named VerySmallDog.lean
October 9, 2025 at 12:24 PM
For a second I was convinced Mathlib had a file named VerySmallDog.lean
Okay this is just too fun using `jj`: over the week I've accumulated a good amount of random fixes and improvements on a prototyping branch (pic 1). Using `jj parallelize 'ancestors(@, 5)'`, I can make them independent while keeping the ultimate contents of […]
[Original post on functional.cafe]
[Original post on functional.cafe]
September 5, 2025 at 1:51 PM
Okay this is just too fun using `jj`: over the week I've accumulated a good amount of random fixes and improvements on a prototyping branch (pic 1). Using `jj parallelize 'ancestors(@, 5)'`, I can make them independent while keeping the ultimate contents of […]
[Original post on functional.cafe]
[Original post on functional.cafe]
"You don't need a .pkpass, just use our app!"
The app:
The app:
August 11, 2025 at 6:41 AM
"You don't need a .pkpass, just use our app!"
The app:
The app:
August 10, 2025 at 3:24 PM
What building current Mathlib from scratch on a 32-hardware threads machine looks like
August 3, 2025 at 3:19 PM
What building current Mathlib from scratch on a 32-hardware threads machine looks like
Brief respite from the rain. What a summer!
August 2, 2025 at 11:33 AM
Brief respite from the rain. What a summer!
Me, sophisticated: "Parmesan demon core"
July 29, 2025 at 5:58 PM
Me, sophisticated: "Parmesan demon core"
My friends were kind enough to leave my body with the capybaras
July 22, 2025 at 8:54 PM
My friends were kind enough to leave my body with the capybaras
We were in a wildlife park on Friday and the responsibility fell to me to explain the concept of Flat Fuck Friday
July 20, 2025 at 12:02 PM
We were in a wildlife park on Friday and the responsibility fell to me to explain the concept of Flat Fuck Friday
We are well-equipped at the office. We have booths for both large land mammals as well as French people.
July 16, 2025 at 7:35 AM
We are well-equipped at the office. We have booths for both large land mammals as well as French people.
And finally a minimum viable demo, fast-forwarding through rebuilding some 1030 files on trivial changes to the `Init.Prelude` root file
July 5, 2025 at 3:07 PM
And finally a minimum viable demo, fast-forwarding through rebuilding some 1030 files on trivial changes to the `Init.Prelude` root file
Took me a while to notice what it reminded me of...
July 4, 2025 at 5:52 PM
Took me a while to notice what it reminded me of...
I made a lil visualization of how far I've already spread the module system through the Lean std libs
July 4, 2025 at 5:49 PM
I made a lil visualization of how far I've already spread the module system through the Lean std libs
Unhappy little bike
June 27, 2025 at 7:04 AM
Unhappy little bike
Happy big train
June 27, 2025 at 7:03 AM
Happy big train
who is little friend under table
June 17, 2025 at 7:50 AM
who is little friend under table
"It's good enough" - Buger Buger
June 17, 2025 at 7:47 AM
"It's good enough" - Buger Buger
One month, the introduction of a phase distinction, and various adjustments to the elaborator and codegen later, we have a first build short-circuiting on a trivial change to an executable `def`.
(before/after)
(before/after)
June 15, 2025 at 1:40 PM
One month, the introduction of a phase distinction, and various adjustments to the elaborator and codegen later, we have a first build short-circuiting on a trivial change to an executable `def`.
(before/after)
(before/after)