Pith Number

pith:SHEIITT7

pith:2019:SHEIITT74VZRGWUR2SYAKWOEAO

not attested not anchored not stored refs pending

Riemannian properties of Engel structures

Nicola Pia

arxiv:1905.09006 v1 · 2019-05-22 · 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{SHEIITT74VZRGWUR2SYAKWOEAO}

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	2026-05-17T23:45:24.625767Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

91c8844e7fe573135a91d4b00559c403a14f5a9fc35fd6c35ae7d30c20470001

Aliases

arxiv: 1905.09006 · arxiv_version: 1905.09006v1 · doi: 10.48550/arxiv.1905.09006 · pith_short_12: SHEIITT74VZR · pith_short_16: SHEIITT74VZRGWUR · pith_short_8: SHEIITT7

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/SHEIITT74VZRGWUR2SYAKWOEAO \
  | 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: 91c8844e7fe573135a91d4b00559c403a14f5a9fc35fd6c35ae7d30c20470001

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4ae6adcfae73778ab9731e08804340a43d3ea2ba5d93ef48fcf801a0d019bfa8",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.DG",
    "submitted_at": "2019-05-22T08:02:30Z",
    "title_canon_sha256": "c678c67bc78b268b07f74ab33bf5d8d65f70e9b27da901815be1fb16f52ad38d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1905.09006",
    "kind": "arxiv",
    "version": 1
  }
}