Pith Number

pith:YGA5MGDD

pith:2011:YGA5MGDD6UYK3SYRV2GW653HEO

not attested not anchored not stored refs pending

Remarks on variational problems for Fefferman's measure

Christopher Hammond, David E. Barrett

arxiv:1109.5882 v1 · 2011-09-27 · math.CV

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{YGA5MGDD6UYK3SYRV2GW653HEO}

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	2026-05-18T04:12:11.056049Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c181d61863f530adcb11ae8d6f776723b5c7d2e3a3547317285491646382d462

Aliases

arxiv: 1109.5882 · arxiv_version: 1109.5882v1 · doi: 10.48550/arxiv.1109.5882 · pith_short_12: YGA5MGDD6UYK · pith_short_16: YGA5MGDD6UYK3SYR · pith_short_8: YGA5MGDD

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/YGA5MGDD6UYK3SYRV2GW653HEO \
  | 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: c181d61863f530adcb11ae8d6f776723b5c7d2e3a3547317285491646382d462

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ced804d1456c948f919ba32259eaec17ee2caa0dcee094e5b5122d0ba2e574a2",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CV",
    "submitted_at": "2011-09-27T13:26:48Z",
    "title_canon_sha256": "5ed09d60d16714fb2715816544eb4b78f118e3a24f6aa0e041cce5fc8d2e6b05"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1109.5882",
    "kind": "arxiv",
    "version": 1
  }
}