Pith Number

pith:4D6S53OQ

pith:2018:4D6S53OQB3HFT7UVWHCBHAFYI5

not attested not anchored not stored refs pending

On the Blaschke-Petkantschin Formula and Drury's Identity

Boris Rubin

arxiv:1801.09113 v2 · 2018-01-27 · math.MG

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{4D6S53OQB3HFT7UVWHCBHAFYI5}

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	2026-05-18T00:00:08.811996Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e0fd2eedd00ece59fe95b1c41380b84761f04b7e34b86a13edaab48ecc04314b

Aliases

arxiv: 1801.09113 · arxiv_version: 1801.09113v2 · doi: 10.48550/arxiv.1801.09113 · pith_short_12: 4D6S53OQB3HF · pith_short_16: 4D6S53OQB3HFT7UV · pith_short_8: 4D6S53OQ

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/4D6S53OQB3HFT7UVWHCBHAFYI5 \
  | 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: e0fd2eedd00ece59fe95b1c41380b84761f04b7e34b86a13edaab48ecc04314b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "48aff35fb0b889e028ff4b1f3ef4919cc3aa3343e95045578d51a080f7482247",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.MG",
    "submitted_at": "2018-01-27T17:05:34Z",
    "title_canon_sha256": "d02b125fe558e5a85088533de71aacd41687a900e530ad3e76d5799e456a9b1f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1801.09113",
    "kind": "arxiv",
    "version": 2
  }
}