Pith Number

pith:QQ6HHSLC

pith:2013:QQ6HHSLC2KMIUO7UJLAY2EEZON

not attested not anchored not stored refs pending

On contact symmetries of evolution equations

Changzheng Qu, Qing Huang, Renat Zhdanov

arxiv:1301.2097 v1 · 2013-01-10 · math-ph · math.MP

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{QQ6HHSLC2KMIUO7UJLAY2EEZON}

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	2026-05-18T03:36:47.467272Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

843c73c962d2988a3bf44ac18d1099735dfe788195337ff28be13f27d7948a21

Aliases

arxiv: 1301.2097 · arxiv_version: 1301.2097v1 · doi: 10.48550/arxiv.1301.2097 · pith_short_12: QQ6HHSLC2KMI · pith_short_16: QQ6HHSLC2KMIUO7U · pith_short_8: QQ6HHSLC

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/QQ6HHSLC2KMIUO7UJLAY2EEZON \
  | 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: 843c73c962d2988a3bf44ac18d1099735dfe788195337ff28be13f27d7948a21

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "855ead5b827ea04718b57a92ad204697fe552e70d6b4082cedac6a4ce9dacfab",
    "cross_cats_sorted": [
      "math.MP"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math-ph",
    "submitted_at": "2013-01-10T12:08:09Z",
    "title_canon_sha256": "b3ab9318e439984cf341506baa281da9638da6528bbf5eae108477284651d7e3"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1301.2097",
    "kind": "arxiv",
    "version": 1
  }
}