Co-authorship neighborhood
Sagar Kumar'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 | Sagar Kumar | Focal | 1 | 5 | 5.0 | 2026 |
| 2 | Alexander Erlei | Direct collaborator | 3 | 7 | 10.0 | 2026 |
| 3 | Federico Maria Cau | Direct collaborator | 1 | 5 | 5.0 | 2026 |
| 4 | K. Bizer | Direct collaborator | 2 | 6 | 8.0 | 2026 |
| 5 | R. Georgiev | Direct collaborator | 1 | 5 | 5.0 | 2026 |
| 6 | U. Gadiraju | Direct collaborator | 4 | 9 | 12.0 | 2026 |
Displayed collaboration table
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| Author pair | Shared papers | Full weight | Fractional weight |
|---|---|---|---|
| Federico Maria Cau — R. Georgiev | 1 | 1 | 0.2 |
| Federico Maria Cau — Sagar Kumar | 1 | 1 | 0.2 |
| Federico Maria Cau — U. Gadiraju | 1 | 1 | 0.2 |
| Federico Maria Cau — K. Bizer | 1 | 1 | 0.2 |
| Federico Maria Cau — Alexander Erlei | 1 | 1 | 0.2 |
| R. Georgiev — Sagar Kumar | 1 | 1 | 0.2 |
| R. Georgiev — U. Gadiraju | 1 | 1 | 0.2 |
| R. Georgiev — K. Bizer | 1 | 1 | 0.2 |
| R. Georgiev — Alexander Erlei | 1 | 1 | 0.2 |
| Sagar Kumar — U. Gadiraju | 1 | 1 | 0.2 |
| Sagar Kumar — K. Bizer | 1 | 1 | 0.2 |
| Sagar Kumar — Alexander Erlei | 1 | 1 | 0.2 |
| U. Gadiraju — K. Bizer | 2 | 2 | 0.533 |
| U. Gadiraju — Alexander Erlei | 3 | 3 | 1.033 |
| K. Bizer — Alexander Erlei | 2 | 2 | 0.533 |
Graph construction and limits
Each distinct paper contributes an undirected pair for every two eligible identities in its deduplicated latest Semantic Scholar 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.