Pith Number

pith:5EUQOT67

pith:2019:5EUQOT672SAP6JLKFDIMFPWEKP

not attested not anchored not stored refs pending

The Urban Observatory: a Multi-Modal Imaging Platform for the Study of Dynamics in Complex Urban Systems

Andreas Karpf, Federica B. Bianco, Gregory Dobler, Jonathan S. Wurtele, Julien Baur, Masoud Ghandehari, Mohit S. Sharma, Steven E. Koonin

arxiv:1909.05940 v1 · 2019-09-12 · astro-ph.IM

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{5EUQOT672SAP6JLKFDIMFPWEKP}

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	2026-07-05T00:04:30.932395Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e929074fdfd480ff256a28d0c2bec453fa9c6a60fc0edaa80ed9c98930aa3658

Aliases

arxiv: 1909.05940 · arxiv_version: 1909.05940v1 · doi: 10.48550/arxiv.1909.05940 · pith_short_12: 5EUQOT672SAP · pith_short_16: 5EUQOT672SAP6JLK · pith_short_8: 5EUQOT67

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/5EUQOT672SAP6JLKFDIMFPWEKP \
  | 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: e929074fdfd480ff256a28d0c2bec453fa9c6a60fc0edaa80ed9c98930aa3658

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "cb0414116209665bb7070b5392e3c37a743e60042602399e53fe699f2eb6f4d7",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.IM",
    "submitted_at": "2019-09-12T20:38:34Z",
    "title_canon_sha256": "c4c823155c6979afb9daf3e99c78fdd853ef3e57cb186176b74733433262d4e8"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1909.05940",
    "kind": "arxiv",
    "version": 1
  }
}