Pith Number

pith:2QP7DUST

pith:2019:2QP7DUSTBCQRWXGFRCBUZPQZAO

not attested not anchored not stored refs pending

The leading edge of a free boundary interacting with a line of fast diusion

Jean-Michel Roquejoffre (IMT), Luis Caffarelli

arxiv:1903.05867 v1 · 2019-03-14 · 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{2QP7DUSTBCQRWXGFRCBUZPQZAO}

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	2026-05-17T23:51:15.925293Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d41ff1d25308a11b5cc588834cbe19038a8fd5f533d07f494f75d4e683284ed5

Aliases

arxiv: 1903.05867 · arxiv_version: 1903.05867v1 · doi: 10.48550/arxiv.1903.05867 · pith_short_12: 2QP7DUSTBCQR · pith_short_16: 2QP7DUSTBCQRWXGF · pith_short_8: 2QP7DUST

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/2QP7DUSTBCQRWXGFRCBUZPQZAO \
  | 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: d41ff1d25308a11b5cc588834cbe19038a8fd5f533d07f494f75d4e683284ed5

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "60eed9a12f716bf5e4dd6266fc9a0e805efaef882003fed3884d6866fffdc56d",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AP",
    "submitted_at": "2019-03-14T09:21:57Z",
    "title_canon_sha256": "8a09159a530de0fcdb364383c8621054bf0dcc719efa4631e37ac4c628233549"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1903.05867",
    "kind": "arxiv",
    "version": 1
  }
}