Pith Number

pith:DNOFQS6H

pith:2018:DNOFQS6HVIGAGT2ULPZENIXZBQ

not attested not anchored not stored refs pending

A possible advantage of telescopes with a non-circular pupil

Barak Zackay, Eran O. Ofek, Guy Nir

arxiv:1809.09933 v1 · 2018-09-26 · astro-ph.IM

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{DNOFQS6HVIGAGT2ULPZENIXZBQ}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more

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	2026-05-17T23:39:58.155025Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

1b5c584bc7aa0c034f545bf246a2f90c2fea30a12c634e408431d3ca261ac29f

Aliases

arxiv: 1809.09933 · arxiv_version: 1809.09933v1 · doi: 10.48550/arxiv.1809.09933 · pith_short_12: DNOFQS6HVIGA · pith_short_16: DNOFQS6HVIGAGT2U · pith_short_8: DNOFQS6H

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/DNOFQS6HVIGAGT2ULPZENIXZBQ \
  | 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: 1b5c584bc7aa0c034f545bf246a2f90c2fea30a12c634e408431d3ca261ac29f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d5e17edb9311ab69fd7203a5034a97bb281d9c2e7759727dc99b66e10b6b35c2",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.IM",
    "submitted_at": "2018-09-26T12:25:46Z",
    "title_canon_sha256": "be651137abe3612d618386dc0f44a1689811f0d3dccf4df593ceede68b736535"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1809.09933",
    "kind": "arxiv",
    "version": 1
  }
}