Pith Number

pith:JCBO6QIR

pith:2016:JCBO6QIR4KKG2TH5TR3OIEJLMX

not attested not anchored not stored refs pending

Ptolemy Constants as Described by Eccentricity

Steven Finch

arxiv:1608.04299 v1 · 2016-08-12 · math.MG

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{JCBO6QIR4KKG2TH5TR3OIEJLMX}

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	2026-05-18T01:09:03.844095Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

4882ef4111e2946d4cfd9c76e4112b65d8387c875bac77d038048fa553860851

Aliases

arxiv: 1608.04299 · arxiv_version: 1608.04299v1 · doi: 10.48550/arxiv.1608.04299 · pith_short_12: JCBO6QIR4KKG · pith_short_16: JCBO6QIR4KKG2TH5 · pith_short_8: JCBO6QIR

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/JCBO6QIR4KKG2TH5TR3OIEJLMX \
  | 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: 4882ef4111e2946d4cfd9c76e4112b65d8387c875bac77d038048fa553860851

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3964ffe44dd9977d17e9c5b527521a4f80aeea49908fd4fedcfea35df80e5302",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.MG",
    "submitted_at": "2016-08-12T16:01:14Z",
    "title_canon_sha256": "5797e825bc0c6b357a34989026e7e1543cf167661850328355dc214ce295f6f6"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1608.04299",
    "kind": "arxiv",
    "version": 1
  }
}