Pith Number

pith:FL5I4UKN

pith:2021:FL5I4UKNDCQJFXJ3ZPZSE7RHXT

not attested not anchored not stored refs pending

Thermal-light heterodyne spectroscopy with frequency comb calibration

Connor Fredrick, Franklyn Quinlan, Freja Olsen, Ryan Terrien, Scott A. Diddams, Suvrath Mahadevan

arxiv:2108.05991 v2 · 2021-08-12 · physics.optics · 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{FL5I4UKNDCQJFXJ3ZPZSE7RHXT}

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	2026-07-05T04:02:18.093397Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2afa8e514d18a092dd3bcbf3227e27bcce5137f2522fa2996fa62c33822726b4

Aliases

arxiv: 2108.05991 · arxiv_version: 2108.05991v2 · doi: 10.48550/arxiv.2108.05991 · pith_short_12: FL5I4UKNDCQJ · pith_short_16: FL5I4UKNDCQJFXJ3 · pith_short_8: FL5I4UKN

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/FL5I4UKNDCQJFXJ3ZPZSE7RHXT \
  | 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: 2afa8e514d18a092dd3bcbf3227e27bcce5137f2522fa2996fa62c33822726b4

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "78caea51f8eccfbee6a8881110f4b397a66913fa4622952cb638d2a5b1e3b20c",
    "cross_cats_sorted": [
      "astro-ph.IM"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.optics",
    "submitted_at": "2021-08-12T23:01:12Z",
    "title_canon_sha256": "0bde4ab26c1ef756fe8cffdb2cd2a72aa1fa40d941b99a5ae071501faac1c876"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2108.05991",
    "kind": "arxiv",
    "version": 2
  }
}