Pith Number

pith:UNUSVRFR

pith:2012:UNUSVRFRJEY2RK4UWFA7Z3U3BJ

not attested not anchored not stored refs pending

Should we solve Plateau's problem again?

Guy David (LM-Orsay)

arxiv:1207.4638 v1 · 2012-07-19 · math.CA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{UNUSVRFRJEY2RK4UWFA7Z3U3BJ}

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	2026-05-18T03:50:36.340476Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a3692ac4b14931a8ab94b141fcee9b0a62151b5af96703aa48ae04d6eb999639

Aliases

arxiv: 1207.4638 · arxiv_version: 1207.4638v1 · doi: 10.48550/arxiv.1207.4638 · pith_short_12: UNUSVRFRJEY2 · pith_short_16: UNUSVRFRJEY2RK4U · pith_short_8: UNUSVRFR

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/UNUSVRFRJEY2RK4UWFA7Z3U3BJ \
  | 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: a3692ac4b14931a8ab94b141fcee9b0a62151b5af96703aa48ae04d6eb999639

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "57c22097dfd0709d53a097ad7bce2f1aef3a3f45950c406fb5966999ecab8e30",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CA",
    "submitted_at": "2012-07-19T12:17:55Z",
    "title_canon_sha256": "1f4faa9996271e3f998925b40e1f0cf1c29d52afe19a67602482e6341c2c09f7"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1207.4638",
    "kind": "arxiv",
    "version": 1
  }
}