Pith Number

pith:XZNGAMWU

pith:2019:XZNGAMWUGZVUCHEWWNBZDB6M7L

not attested not anchored not stored refs pending

How to interpret algorithmically constructed topical structures of research specialties? A case study comparing an internal and an external mapping of the topical structure of invasion biology

Matthias Held, Theresa Velden

arxiv:1905.03485 v1 · 2019-05-09 · cs.DL · physics.soc-ph

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{XZNGAMWUGZVUCHEWWNBZDB6M7L}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more · Embed verified badge

Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Receipt and verification

First computed	2026-05-17T23:46:39.733141Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

be5a6032d4366b411c96b3439187ccfaf0825cf1ee8b8e6be420af5c8e015798

Aliases

arxiv: 1905.03485 · arxiv_version: 1905.03485v1 · doi: 10.48550/arxiv.1905.03485 · pith_short_12: XZNGAMWUGZVU · pith_short_16: XZNGAMWUGZVUCHEW · pith_short_8: XZNGAMWU

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/XZNGAMWUGZVUCHEWWNBZDB6M7L \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: be5a6032d4366b411c96b3439187ccfaf0825cf1ee8b8e6be420af5c8e015798

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c7a4f0b6c38901233f5f6f240a524e7aeb9150d0b6f8c4a4e60a5d611b5eaaca",
    "cross_cats_sorted": [
      "physics.soc-ph"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DL",
    "submitted_at": "2019-05-09T08:29:15Z",
    "title_canon_sha256": "2392443e2f0ca2ccfba8c5554f9d73863dcd189a321900c87c57855881942cb7"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1905.03485",
    "kind": "arxiv",
    "version": 1
  }
}