Pith Number

pith:WX7P652J

pith:2013:WX7P652J3BVAXBRM2THUHJC5JT

not attested not anchored not stored refs pending

An SIR epidemic model with free boundary

Kwang Ik Kim, Qunying Zhang, Zhigui Lin

arxiv:1302.0326 v1 · 2013-02-02 · math.AP

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{WX7P652J3BVAXBRM2THUHJC5JT}

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	2026-05-18T03:34:37.446090Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b5feff7749d86a0b862cd4cf43a45d4ceb31868c04ddb5b29301e7ce8d1293a3

Aliases

arxiv: 1302.0326 · arxiv_version: 1302.0326v1 · doi: 10.48550/arxiv.1302.0326 · pith_short_12: WX7P652J3BVA · pith_short_16: WX7P652J3BVAXBRM · pith_short_8: WX7P652J

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/WX7P652J3BVAXBRM2THUHJC5JT \
  | 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: b5feff7749d86a0b862cd4cf43a45d4ceb31868c04ddb5b29301e7ce8d1293a3

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "162ec1df6d0eeab4a0a56c2f6f7709cbb2101e887f07aef64ce8792b6e60b202",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AP",
    "submitted_at": "2013-02-02T00:57:01Z",
    "title_canon_sha256": "cf8ee18e9b456147f9a9103c1902d6949f21dc6e161ce9b3c075263be56dc520"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1302.0326",
    "kind": "arxiv",
    "version": 1
  }
}