Pith Number

pith:4VGR3E6B

pith:2014:4VGR3E6B3IKOIMDQESWFDLQDP5

not attested not anchored not stored refs pending

The Massive Star Population in M101. II. Spatial Variations in the Recent Star Formation History

Roberta M. Humphreys, Skyler Grammer

arxiv:1407.0020 v1 · 2014-06-30 · astro-ph.SR · astro-ph.GA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{4VGR3E6B3IKOIMDQESWFDLQDP5}

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	2026-05-18T01:42:43.364818Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e54d1d93c1da14e4307024ac51ae037f6d769a7364556e374af5e4387c32d54e

Aliases

arxiv: 1407.0020 · arxiv_version: 1407.0020v1 · doi: 10.48550/arxiv.1407.0020 · pith_short_12: 4VGR3E6B3IKO · pith_short_16: 4VGR3E6B3IKOIMDQ · pith_short_8: 4VGR3E6B

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/4VGR3E6B3IKOIMDQESWFDLQDP5 \
  | 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: e54d1d93c1da14e4307024ac51ae037f6d769a7364556e374af5e4387c32d54e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b29ab8ab2d71c121b7325a63d00406a5412c2d64c9187282f6d26cbdbecb5296",
    "cross_cats_sorted": [
      "astro-ph.GA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2014-06-30T20:00:06Z",
    "title_canon_sha256": "431546f62001b60be4cb00eb319fb2b520037ff8bf3e66b6c2d219d2b06f1642"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1407.0020",
    "kind": "arxiv",
    "version": 1
  }
}