Co-authorship neighborhood
Willem van der Maden's displayed neighborhood
5 of 5 direct collaborators shown.
Scroll the diagram horizontally to inspect every displayed node.
Ordered author table
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| Display order | Author | Role | Distinct papers | Unique collaborators | Weighted degree | Active span |
|---|---|---|---|---|---|---|
| 1 | Willem van der Maden | Focal | 1 | 5 | 5.0 | 2026 |
| 2 | Aske Mottelson | Direct collaborator | 2 | 7 | 7.0 | 2026 |
| 3 | Jichen Zhu | Direct collaborator | 1 | 5 | 5.0 | 2026 |
| 4 | Malak Sadek | Direct collaborator | 1 | 5 | 5.0 | 2026 |
| 5 | Q. Vera Liao | Direct collaborator | 1 | 5 | 5.0 | 2026 |
| 6 | Ziang Xiao | Direct collaborator | 1 | 5 | 5.0 | 2026 |
Displayed collaboration table
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| Author pair | Shared papers | Full weight | Fractional weight |
|---|---|---|---|
| Malak Sadek — Aske Mottelson | 1 | 1 | 0.2 |
| Malak Sadek — Jichen Zhu | 1 | 1 | 0.2 |
| Malak Sadek — Q. Vera Liao | 1 | 1 | 0.2 |
| Malak Sadek — Ziang Xiao | 1 | 1 | 0.2 |
| Malak Sadek — Willem van der Maden | 1 | 1 | 0.2 |
| Aske Mottelson — Jichen Zhu | 1 | 1 | 0.2 |
| Aske Mottelson — Q. Vera Liao | 1 | 1 | 0.2 |
| Aske Mottelson — Ziang Xiao | 1 | 1 | 0.2 |
| Aske Mottelson — Willem van der Maden | 1 | 1 | 0.2 |
| Jichen Zhu — Q. Vera Liao | 1 | 1 | 0.2 |
| Jichen Zhu — Ziang Xiao | 1 | 1 | 0.2 |
| Jichen Zhu — Willem van der Maden | 1 | 1 | 0.2 |
| Q. Vera Liao — Ziang Xiao | 1 | 1 | 0.2 |
| Q. Vera Liao — Willem van der Maden | 1 | 1 | 0.2 |
| Ziang Xiao — Willem van der Maden | 1 | 1 | 0.2 |
Graph construction and limits
Each distinct paper contributes an undirected pair for every two eligible identities in its deduplicated latest OpenAlex author list. Self-loops are removed. Solo papers count toward an author's paper total but create no edge. The selected display is an ego subgraph. Paper, collaborator, weighted-degree, and active-span metrics for every displayed node use the full filtered provider view; component size describes the focal author's component.
Immutable provider payloads are stored once. A separate receipt log records a later delivery of an earlier payload, so roster reversions remain visible. Exact duplicate receipts are idempotent. Equal timestamps use receipt insertion order as the tie-breaker.
Co-authorship records shared paper attribution only. It does not establish contribution size, research quality, influence, friendship, topic similarity, or citation relationships.