Pith Number

pith:SBQQSSUN

pith:1999:SBQQSSUNU7RGWEAH7VCDQHMZMX

not attested not anchored not stored refs pending

An L-A pair for the Apel'rot system and a new integrable case for the Euler-Poisson equations on so(4)xso(4)

Borislav Gajic, Vladimir Dragovic

arxiv:math-ph/9911047 v1 · 1999-11-30 · math-ph · math.MP · math.SG

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{SBQQSSUNU7RGWEAH7VCDQHMZMX}

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	2026-07-04T14:34:12.353740Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

9061094a8da7e26b1007fd44381d9965d9aab99e30579509730569cdba961934

Aliases

arxiv: math-ph/9911047 · arxiv_version: math-ph/9911047v1 · doi: 10.48550/arxiv.math-ph/9911047 · pith_short_12: SBQQSSUNU7RG · pith_short_16: SBQQSSUNU7RGWEAH · pith_short_8: SBQQSSUN

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/SBQQSSUNU7RGWEAH7VCDQHMZMX \
  | 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: 9061094a8da7e26b1007fd44381d9965d9aab99e30579509730569cdba961934

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "efe93e1ab8e72e865b791cf5074f0f9a66790a1ef695dcac7b4b7f11dc9c8e7f",
    "cross_cats_sorted": [
      "math.MP",
      "math.SG"
    ],
    "license": "",
    "primary_cat": "math-ph",
    "submitted_at": "1999-11-30T11:23:30Z",
    "title_canon_sha256": "44269c4612ce07ab501351118197c8713d7f25f1ded2003dabe8d46114628ecf"
  },
  "schema_version": "1.0",
  "source": {
    "id": "math-ph/9911047",
    "kind": "arxiv",
    "version": 1
  }
}