Pith Number

pith:BWUR4L4J

pith:2016:BWUR4L4JOJUV3ZIP73A4F3YAGF

not attested not anchored not stored refs pending

A computer-assisted existence proof for Emden's equation on an unbounded L-shaped domain

Dagmar R\"utters, Filomena Pacella, Michael Plum

arxiv:1601.01543 v1 · 2016-01-07 · 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{BWUR4L4JOJUV3ZIP73A4F3YAGF}

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	2026-05-18T01:19:57.013505Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0da91e2f8972695de50ffec1c2ef00314a9a7a698bb2e5fea77c7fb3ec2d396b

Aliases

arxiv: 1601.01543 · arxiv_version: 1601.01543v1 · doi: 10.48550/arxiv.1601.01543 · pith_short_12: BWUR4L4JOJUV · pith_short_16: BWUR4L4JOJUV3ZIP · pith_short_8: BWUR4L4J

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/BWUR4L4JOJUV3ZIP73A4F3YAGF \
  | 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: 0da91e2f8972695de50ffec1c2ef00314a9a7a698bb2e5fea77c7fb3ec2d396b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "097280a133c1c5477c3b23d679a9deed7bbddfebd76bb0bf95c225bada449a54",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AP",
    "submitted_at": "2016-01-07T14:18:29Z",
    "title_canon_sha256": "6222b2effea76eaa42fb2bbf163185ba3fc0684e0908333529b91a7a4f6bb6a7"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1601.01543",
    "kind": "arxiv",
    "version": 1
  }
}