Pith Number

pith:AE4X2KXX

pith:2019:AE4X2KXX6PRFS7I6QA23DIADPH

not attested not anchored not stored refs pending

Active optics in astronomy - Freeform mirror for the MESSIER telescope proposal

Eduard Muslimov (LAM), Gerard Lemaitre (LAM), Pascal Vola (LAM)

arxiv:1901.07373 v1 · 2019-01-17 · astro-ph.IM

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{AE4X2KXX6PRFS7I6QA23DIADPH}

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	2026-05-17T23:55:47.164823Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

01397d2af7f3e2597d1e8035b1a00379e188592520bc6ce040a564fd8d4aa967

Aliases

arxiv: 1901.07373 · arxiv_version: 1901.07373v1 · doi: 10.48550/arxiv.1901.07373 · pith_short_12: AE4X2KXX6PRF · pith_short_16: AE4X2KXX6PRFS7I6 · pith_short_8: AE4X2KXX

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/AE4X2KXX6PRFS7I6QA23DIADPH \
  | 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: 01397d2af7f3e2597d1e8035b1a00379e188592520bc6ce040a564fd8d4aa967

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "edfabec2771d41d23383e238e8fcdec7166b6e29c71b879357b711204a7925cf",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.IM",
    "submitted_at": "2019-01-17T07:12:20Z",
    "title_canon_sha256": "1da4030a01086aea5d379928903d63a6c8bf2009fb6a9cf14250bdbfa98ea4f4"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1901.07373",
    "kind": "arxiv",
    "version": 1
  }
}