Pith Number

pith:DGIR4QMY

pith:2017:DGIR4QMYUR5F6CFQOQW7O2THKW

not attested not anchored not stored refs pending

A Note on the Passing Time of the Spherical Kepler Problem

Lei Zhao

arxiv:1705.02237 v3 · 2017-05-05 · math.DS

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{DGIR4QMYUR5F6CFQOQW7O2THKW}

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	2026-05-18T00:27:52.569624Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

19911e4198a47a5f08b0742df76a6755bb6f62c973bf2a2dedeb39dac2593a4e

Aliases

arxiv: 1705.02237 · arxiv_version: 1705.02237v3 · doi: 10.48550/arxiv.1705.02237 · pith_short_12: DGIR4QMYUR5F · pith_short_16: DGIR4QMYUR5F6CFQ · pith_short_8: DGIR4QMY

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/DGIR4QMYUR5F6CFQOQW7O2THKW \
  | 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: 19911e4198a47a5f08b0742df76a6755bb6f62c973bf2a2dedeb39dac2593a4e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "74bb987499f1f1156cfbf801f8a65e9ff2ff89957c52b9c066021ab1af7083a4",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.DS",
    "submitted_at": "2017-05-05T14:30:07Z",
    "title_canon_sha256": "0cf4ce963e08b9ac80cc9870d370fa9145aee4d70759dd37a5bc29b8e8c58047"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1705.02237",
    "kind": "arxiv",
    "version": 3
  }
}