Pith Number

pith:H5C6G5NE

pith:2011:H5C6G5NEWNUVBY2Z2BEWM7EQAZ

not attested not anchored not stored refs pending

On a new parameter to estimate the helium content in old stellar systems

A. Calamida, A. Di Cecco, A. Kunder, A. M. Piersimoni, A. Pietrinferni, A. R. Walker, A. Weiss, C. E. Corsi, F. Caputo, F. Troisi, G. Bono, G. Iannicola, I. Ferraro, L. Pulone, M. Dall'Ora, M. Fabrizio, M. Monelli, M. Nonino, M. Romaniello, M. Zoccali, P. B. Stetson, R. Buonanno

arxiv:1106.2734 v1 · 2011-06-14 · astro-ph.SR · astro-ph.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{H5C6G5NEWNUVBY2Z2BEWM7EQAZ}

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	2026-05-18T02:01:37.412645Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

3f45e375a4b36950e359d049667c90064642e040d42b7eb43a885fc14f958989

Aliases

arxiv: 1106.2734 · arxiv_version: 1106.2734v1 · doi: 10.48550/arxiv.1106.2734 · pith_short_12: H5C6G5NEWNUV · pith_short_16: H5C6G5NEWNUVBY2Z · pith_short_8: H5C6G5NE

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/H5C6G5NEWNUVBY2Z2BEWM7EQAZ \
  | 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: 3f45e375a4b36950e359d049667c90064642e040d42b7eb43a885fc14f958989

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3ab708811c0be668522d2caec70cb36d9d5edb24a0359b356f8fe69e2275eb16",
    "cross_cats_sorted": [
      "astro-ph.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2011-06-14T14:54:02Z",
    "title_canon_sha256": "a7297b5e71c5e9f0ca537c73c9455e416c19ced466cccb5b3938687e23cb5b25"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1106.2734",
    "kind": "arxiv",
    "version": 1
  }
}