Rasmus Lindahl
Engineer / AI practitioner (self-declared)
Member since 29 Jul 2026
- Contributions
- 47
- Entries
- 1
- Comments
- 6
- Edits
- 40
- Entry score
- +1
Entries
- Levit–Mandrescu Unimodality Conjecture
DisprovedSolved 2026-07-22Score +1
Comments
On Ehrhart's Volume Conjecture · 02 Aug 2026
On Erdős Problem #131 · 02 Aug 2026
Verified before publishing. I installed Lean 4.32.0, cloned the linked repository and built it against the pinned mathlib: 17,408 lines compile with no `sorry`, `admit` or `native_decide`. `#print axioms Nondividing.main_log_limit` returns exactly the eleven whitelisted axioms and no `sorryAx`, and the definitions and theorem type match the trusted `Challenge.lean`, so the formalization proves what it says it proves.
What is still open: the eight external interfaces are assumed rather than proved. They are each cited to published work, but I have not checked them against the sources, and `convex_density_set` carries the exponent the whole 1/4 to 1/5 improvement rests on. The entry is therefore a candidate rather than resolved, and erdosproblems.com has not accepted the claim yet - posting it there would be the natural next step.
On 1.28249... Lower Bound and Partial Upper Bounds for Cost-Preserving Single-Source Unsplittable Flows · 01 Aug 2026
Thanks, that's really useful context! So 1.28249 and so on is just where the explicit k=17 certificate lands, and the family should approach 4/3 as the number of terminals grows. Is the 4/3 limit established somewhere in the preprint (I could only find the 3/2 ceiling for the class), or is it numerical/expected for now? Happy to add it to the entry either way, I just want to label it correctly as proved versus conjectured. And if you ever certify a larger instance, the entry can track the new record constant.
On 1.28249... Lower Bound and Partial Upper Bounds for Cost-Preserving Single-Source Unsplittable Flows · 01 Aug 2026
Feel free to discuss any entry values that might be wrong here. Also thank you for the submission :)
On Non-Covering Congruence Systems over Fq[x] · 01 Aug 2026
Thank you Amber :)
On Optimal Exponent Relating Sumsets and Difference Sets · 30 Jul 2026
Quite exciting to see a smaller model (295B) make contributions!
Recent edits
- Significance on Erdős Problem #424 · 02 Aug 2026
- Model on Erdős Problem #424 · 02 Aug 2026
- More links on Erdős Problem #424 · 02 Aug 2026
- Result qualifier on Erdős Problem #424 · 02 Aug 2026
- Entry address on Erdős Problem #424 · 02 Aug 2026
- Publication on Erdős Problem #424 · 02 Aug 2026
- Status on Erdős Problem #424 · 02 Aug 2026
- What the AI did on Erdős Problem #424 · 02 Aug 2026
- Field detail on Erdős Problem #424 · 02 Aug 2026
- Short name on Erdős Problem #424 · 02 Aug 2026
- Verification note on Erdős Problem #424 · 02 Aug 2026
- Wikipedia on Ehrhart's Volume Conjecture · 02 Aug 2026
- Year posed on Kourovka Problem 21.150 - Rank Inequality for p-Group Extensions · 02 Aug 2026
- Year posed on Kourovka Problem 21.147 - Relatively Convex Subgroups · 02 Aug 2026
- Year posed on Kourovka Problem 21.24 - Cograph Power Graphs Are Chordal · 02 Aug 2026
Showing the latest 15 of 40.
Good catch, thanks. Fixed: the Wikipedia field now reads 1 language.
The article has existed since May 2016, so it predates the solution by a decade and counts under our freeze rule. Coverage created in response to a result does not count, which is why the field is a frozen snapshot rather than a live number.
We missed it for a duller reason. This entry was added after our last notability sweep, and the count defaults to 0, which the entry page then renders as "No dedicated article". That is a claim we had not actually earned here.
I re-ran the check across all 252 entries after your comment, and this was the only one affected. The sweep is a script now, so it can be re-run instead of relying on the default.