Pith Number

pith:DPA3DX35

pith:2014:DPA3DX35OYWWTGVN2AVKCYMYS7

not attested not anchored not stored refs pending

Contact equivalence problem for KDV-type equations

Mehdi Nadjafikhah, Mostafa Hesamiarshad

arxiv:1408.5875 v2 · 2014-08-25 · math.DG

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{DPA3DX35OYWWTGVN2AVKCYMYS7}

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	2026-05-18T02:31:20.690713Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

1bc1b1df7d762d699aadd02aa1619897d9378f01105a9d12f95a7d179310ba37

Aliases

arxiv: 1408.5875 · arxiv_version: 1408.5875v2 · doi: 10.48550/arxiv.1408.5875 · pith_short_12: DPA3DX35OYWW · pith_short_16: DPA3DX35OYWWTGVN · pith_short_8: DPA3DX35

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/DPA3DX35OYWWTGVN2AVKCYMYS7 \
  | 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: 1bc1b1df7d762d699aadd02aa1619897d9378f01105a9d12f95a7d179310ba37

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "fd9e7ea4d964db196e6d782a865681441a2ba4279f3a5ea1bee6f82ade389f85",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.DG",
    "submitted_at": "2014-08-25T19:28:50Z",
    "title_canon_sha256": "ef9b3a1aecff002cb310402f4a7000c0df5607df100725aff40d399884cce0bd"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1408.5875",
    "kind": "arxiv",
    "version": 2
  }
}