Pith Number

pith:NHQVKALN

pith:2010:NHQVKALNTQN4OBH3AL2UNMTGGF

not attested not anchored not stored refs pending

The staircase method: integrals for periodic reductions of integrable lattice equations

G.R.W. Quispel, Peter H. van der Kamp

arxiv:1005.2071 v2 · 2010-05-12 · 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{NHQVKALNTQN4OBH3AL2UNMTGGF}

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	2026-05-18T02:07:33.784311Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

69e155016d9c1bc704fb02f546b266315e7377bb2bdd13bb55237114b577e374

Aliases

arxiv: 1005.2071 · arxiv_version: 1005.2071v2 · doi: 10.48550/arxiv.1005.2071 · pith_short_12: NHQVKALNTQN4 · pith_short_16: NHQVKALNTQN4OBH3 · pith_short_8: NHQVKALN

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/NHQVKALNTQN4OBH3AL2UNMTGGF \
  | 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: 69e155016d9c1bc704fb02f546b266315e7377bb2bdd13bb55237114b577e374

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "123071aabc301d1bfbeea9e089a3c7c741b3d26b24eccfeb076c653499143c6a",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "nlin.SI",
    "submitted_at": "2010-05-12T12:31:14Z",
    "title_canon_sha256": "973c6a6fda411fe32ca031c3e971de970132a2919d79ac08e03a17520dabba7f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1005.2071",
    "kind": "arxiv",
    "version": 2
  }
}