Pith Number

pith:FDJ2ZEYZ

pith:2012:FDJ2ZEYZJJOOXBII5YWT2ULWDX

not attested not anchored not stored refs pending

Initial value problems for quad equations

Peter H. van der Kamp

arxiv:1210.1414 v1 · 2012-10-04 · nlin.SI · math.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{FDJ2ZEYZJJOOXBII5YWT2ULWDX}

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	2026-05-18T03:44:03.625691Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

28d3ac93194a5ceb8508ee2d3d51761dee959bfddf36f8fa424333e566aeee9c

Aliases

arxiv: 1210.1414 · arxiv_version: 1210.1414v1 · doi: 10.48550/arxiv.1210.1414 · pith_short_12: FDJ2ZEYZJJOO · pith_short_16: FDJ2ZEYZJJOOXBII · pith_short_8: FDJ2ZEYZ

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/FDJ2ZEYZJJOOXBII5YWT2ULWDX \
  | 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: 28d3ac93194a5ceb8508ee2d3d51761dee959bfddf36f8fa424333e566aeee9c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "75dc6f6a697f21f5b0a7ca61133c1ec661a39b8e2e1b9cd51abe5f52ea86760f",
    "cross_cats_sorted": [
      "math.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "nlin.SI",
    "submitted_at": "2012-10-04T12:33:27Z",
    "title_canon_sha256": "57cabb52ca9e2d9198b7d87c5a3f5b7b57706350812d1a74d7b5bb62f2a1d989"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1210.1414",
    "kind": "arxiv",
    "version": 1
  }
}