In Memoriam: Tomáš Kalibera
Tomáš Kalibera, a member of the R Project core team, has passed away after a short illness. His contributions to open source were significant, impacting millions and providing him with a sense of fulfillment. He will be greatly missed by friends and colleagues alike.
- ▪Tomáš Kalibera was a member of the R Project core team.
- ▪He passed away after a short illness.
- ▪His work in open source reached millions and brought him fulfillment.
Story provenance
Source · retrieval · rights · ranking — open for full record
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Attribution is not the same as permission. This drawer separates discovery metadata, excerpts, WeSearch-generated summaries, reuse status, and whether the publisher receives the visit. Nothing here claims a legal grant the publisher has not made.
Record
| Original publisher | LWN.net |
| Canonical URL | https://lwn.net/Articles/1070185/ |
| Publication time | Tue, 28 Apr 2026 13:46:18 +0000 |
| Retrieval time | 2026-04-28T13:49:31.947Z |
| Last seen | 2026-04-28T13:49:31.947Z |
| Headline source | Publisher (no WeSearch rewrite) |
| Excerpt source | publisher body |
| Excerpt method | First ~120 words (~800 chars) of extracted publisher body, fair-use limited. |
| Summary | WeSearch · cerebras-chat (WeSearch summarizer) |
| Summary source text | contentText |
| Citation coverage | Summary is a WeSearch-generated derivative; primary citation is the original publisher URL. |
| Cluster | 3ZCtrhDo4uCO |
| Cluster logic | Grouped by semantic title/content similarity across sources within a rolling window. Same-publisher template collisions are excluded from coverage comparison. |
| Ranking reason | Story pages are not engagement-ranked. Hub feeds use recency, with optional source-diversified chronological ordering (cap consecutive stories per source). No personalized ranking. |
| Publisher visit | Yes — open original |
| Substitutes article? | No — link-out required for full text |
Rights status (four layers)
WeSearch handling by dimension
| Indexing | May the item be indexed (stored, ranked, made findable)? | Allowed |
| Snippet | May a short excerpt of the publisher's text be shown? | Allowed |
| AI summary | May WeSearch generate its own short summary of the article? | Limited |
| Retrieval / RAG | May the content be exposed for third-party retrieval-augmented generation? | Not asserted |
| Model training | May the content be used to train AI models? | Not asserted |
| Commercial reuse | May the content be reused commercially? | Not permitted |
Basis: Derived from the published RSS/Atom feed. Contact: [email protected]. Reviewed: 2026-07-24.
Opening excerpt (first ~120 words) tap to expand
We have received the sad news that Tomáš Kalibera, a member of the R Project core team, has passed away after a short illness. A friend who knew him well wrote to me: he was very happy, and his work fulfilled him. That is, perhaps, the best thing one can say about a life in open source — that the work mattered, that it reached millions, and that the person who did it found meaning in it. Kalibera was mentioned in this 2019 article about C programs passing strings to Fortran subroutines. He will be greatly missed.
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Excerpt limited to ~120 words for fair-use compliance. The full article is at LWN.net.