Pith Number

pith:R2NJDBP2

pith:2018:R2NJDBP2G7Q23C2N2T5HFC4CM7

not attested not anchored not stored refs pending

Time Synchronization over a Free-Space Optical Communication Channel

Hugo Bergeron, Isaac Khader, Jean-Daniel Desch\^enes, Laura C. Sinclair, Nathan R. Newbury, William C. Swann

arxiv:1808.06710 v1 · 2018-08-20 · physics.ins-det · physics.optics

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{R2NJDBP2G7Q23C2N2T5HFC4CM7}

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	2026-05-18T00:07:33.555363Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8e9a9185fa37e1ad8b4dd4fa728b8267c4328d4ce01905d1ffba0131297af412

Aliases

arxiv: 1808.06710 · arxiv_version: 1808.06710v1 · doi: 10.48550/arxiv.1808.06710 · pith_short_12: R2NJDBP2G7Q2 · pith_short_16: R2NJDBP2G7Q23C2N · pith_short_8: R2NJDBP2

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/R2NJDBP2G7Q23C2N2T5HFC4CM7 \
  | 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: 8e9a9185fa37e1ad8b4dd4fa728b8267c4328d4ce01905d1ffba0131297af412

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "6e5f5033f2d33ac226e1f5569a20861e0eb6bab77d8719c1b49ebad47a938f6b",
    "cross_cats_sorted": [
      "physics.optics"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.ins-det",
    "submitted_at": "2018-08-20T22:38:08Z",
    "title_canon_sha256": "520bf060f288e7845cd7f0ea2cc694c18ef304b38c157df0b35de1b3aa438b9e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1808.06710",
    "kind": "arxiv",
    "version": 1
  }
}