Pith Number

pith:K3NQJGFR

pith:2018:K3NQJGFRWPTG7UHJZEIRCZ2RGJ

not attested not anchored not stored refs pending

Addition formulae, B\"acklund transformations, periodic solutions and quadrilateral equations

Da-jun Zhang, Danda Zhang

arxiv:1801.01321 v1 · 2018-01-04 · nlin.SI

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{K3NQJGFRWPTG7UHJZEIRCZ2RGJ}

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	2026-05-18T00:26:42.456869Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

56db0498b1b3e66fd0e9c911116751326479bf98b1e9b225ee428a01b8fa2629

Aliases

arxiv: 1801.01321 · arxiv_version: 1801.01321v1 · doi: 10.48550/arxiv.1801.01321 · pith_short_12: K3NQJGFRWPTG · pith_short_16: K3NQJGFRWPTG7UHJ · pith_short_8: K3NQJGFR

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/K3NQJGFRWPTG7UHJZEIRCZ2RGJ \
  | 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: 56db0498b1b3e66fd0e9c911116751326479bf98b1e9b225ee428a01b8fa2629

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3b3d04c4ff318063274bf82da6d0af399136b95e5d828723520df0790711e565",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "nlin.SI",
    "submitted_at": "2018-01-04T12:16:04Z",
    "title_canon_sha256": "c24cc6fb92e7ab89959c7120b772c6090e4f3d8ece37d98f3ff9a442cd9f1a61"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1801.01321",
    "kind": "arxiv",
    "version": 1
  }
}