Pith Number

pith:VGTPVFUK

pith:2020:VGTPVFUK2TLNP335HIUX6MXO4X

not attested not anchored not stored refs pending

A Time Delay Dynamic System with External Source for the Local Outbreak of 2019-nCoV

Jin Cheng, Keji Liu, Yu Chen, Yu Jiang

arxiv:2002.02590 v1 · 2020-02-07 · physics.soc-ph · math.DS · q-bio.PE

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{VGTPVFUK2TLNP335HIUX6MXO4X}

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	2026-07-05T00:38:57.115049Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a9a6fa968ad4d6d7ef7d3a297f32eee5f9fc561b2a6fb614197079b057a3ac01

Aliases

arxiv: 2002.02590 · arxiv_version: 2002.02590v1 · doi: 10.48550/arxiv.2002.02590 · pith_short_12: VGTPVFUK2TLN · pith_short_16: VGTPVFUK2TLNP335 · pith_short_8: VGTPVFUK

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/VGTPVFUK2TLNP335HIUX6MXO4X \
  | 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: a9a6fa968ad4d6d7ef7d3a297f32eee5f9fc561b2a6fb614197079b057a3ac01

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "755cd9f1aa4c77bcc3c1e33c0c77960eda266e8fd6fbc056fa7cadfb683575a2",
    "cross_cats_sorted": [
      "math.DS",
      "q-bio.PE"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.soc-ph",
    "submitted_at": "2020-02-07T02:28:26Z",
    "title_canon_sha256": "756ce60c44e13e480519080c89539254920c6007cbb6f32f3f3532b8f519c1b3"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2002.02590",
    "kind": "arxiv",
    "version": 1
  }
}