Pith Number

pith:RB4VOBCO

pith:2015:RB4VOBCOY2EW4JJFJKVCQF36JB

not attested not anchored not stored refs pending

Polynomial automorphisms of C^n preserving the Markoff-Hurwitz polynomial

Hengnan Hu, Ser Peow Tan, Ying Zhang

arxiv:1501.06955 v2 · 2015-01-27 · math.GT · math.CV · math.DS · math.GR

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{RB4VOBCOY2EW4JJFJKVCQF36JB}

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	2026-05-18T02:16:50.850876Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

887957044ec6896e25254aaa28177e48677e523a70f85123a3ded879a4721b04

Aliases

arxiv: 1501.06955 · arxiv_version: 1501.06955v2 · doi: 10.48550/arxiv.1501.06955 · pith_short_12: RB4VOBCOY2EW · pith_short_16: RB4VOBCOY2EW4JJF · pith_short_8: RB4VOBCO

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/RB4VOBCOY2EW4JJFJKVCQF36JB \
  | 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: 887957044ec6896e25254aaa28177e48677e523a70f85123a3ded879a4721b04

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2df16c113029fd63e8127bea172b284a0470831e87f337fc3f75338f43b78614",
    "cross_cats_sorted": [
      "math.CV",
      "math.DS",
      "math.GR"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.GT",
    "submitted_at": "2015-01-27T23:42:05Z",
    "title_canon_sha256": "feb5c389251a2fc70d3e365f97b113bd232a38584c8e967a9a51ec6190b9b856"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1501.06955",
    "kind": "arxiv",
    "version": 2
  }
}