Pith Number

pith:7HBLX3CS

pith:2013:7HBLX3CS2SM3QEG3EPRZ6IYAHC

not attested not anchored not stored refs pending

Spreading and vanishing in nonlinear diffusion problems with free boundaries

Bendong Lou, Yihong Du

arxiv:1301.5373 v1 · 2013-01-23 · 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{7HBLX3CS2SM3QEG3EPRZ6IYAHC}

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	2026-05-18T01:10:15.479135Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f9c2bbec52d499b810db23e39f2300388c02d5dcf0026fe280ecc6d615d0c142

Aliases

arxiv: 1301.5373 · arxiv_version: 1301.5373v1 · doi: 10.48550/arxiv.1301.5373 · pith_short_12: 7HBLX3CS2SM3 · pith_short_16: 7HBLX3CS2SM3QEG3 · pith_short_8: 7HBLX3CS

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/7HBLX3CS2SM3QEG3EPRZ6IYAHC \
  | 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: f9c2bbec52d499b810db23e39f2300388c02d5dcf0026fe280ecc6d615d0c142

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2647da9ccc9512d9bc8c03245fce39f7ff962538707028fa8598651d59f61fd9",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AP",
    "submitted_at": "2013-01-23T01:32:50Z",
    "title_canon_sha256": "fee112fd41ef19e2f970fd1137154c7c23b5df96064356333963367555c6d6e7"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1301.5373",
    "kind": "arxiv",
    "version": 1
  }
}