Pith Number

pith:MDGYILQ6

pith:2021:MDGYILQ6PYMIJII4P3HAY7T4KQ

not attested not anchored not stored refs pending

Determination of the speed of light from the longitudinal modes beat frequencies of an open-cavity helium-neon laser

Minneapolis MN, Mohamad Taim, Nicholas Kuder (University of Minnesota, USA)

arxiv:2105.03476 v1 · 2021-05-07 · physics.ed-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{MDGYILQ6PYMIJII4P3HAY7T4KQ}

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	2026-07-05T02:38:35.415600Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

60cd842e1e7e1884a11c7ece0c7e7c543c5b4ac73707694a2f7057ca4c66565f

Aliases

arxiv: 2105.03476 · arxiv_version: 2105.03476v1 · doi: 10.48550/arxiv.2105.03476 · pith_short_12: MDGYILQ6PYMI · pith_short_16: MDGYILQ6PYMIJII4 · pith_short_8: MDGYILQ6

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/MDGYILQ6PYMIJII4P3HAY7T4KQ \
  | 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: 60cd842e1e7e1884a11c7ece0c7e7c543c5b4ac73707694a2f7057ca4c66565f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2d3fc9041962d1bf8cc524df0782169c1d0116d0b3f8e1ee916ffad0e9690f9f",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "physics.ed-ph",
    "submitted_at": "2021-05-07T19:35:47Z",
    "title_canon_sha256": "8196f043a3abe03c96f27e99de74a9be8375b20ca6fdba49e3cd06489f2a8b4f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2105.03476",
    "kind": "arxiv",
    "version": 1
  }
}