Pith Number

pith:37UVYAGE

pith:2013:37UVYAGE4OVREHT3TDTLYGLKW6

not attested not anchored not stored refs pending

Is there a metallicity ceiling to form carbon stars? - A novel technique reveals a scarcity of C stars in the inner M31 disk

B. Aringer, B. F. Williams, C. E. Dorman, D. R. Weisz, J. J. Dalcanton, J. L. Melbourne, K. A. G. Olsen, L. Girardi, M. L. Boyer, P. Guhathakurta, P. Marigo, P. Rosenfield, W. Nowotny

arxiv:1307.4081 v1 · 2013-07-15 · astro-ph.SR · astro-ph.CO

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

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	2026-05-18T01:48:49.973551Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

dfe95c00c4e3ab121e7b98e6bc196ab79ab703b906475c93c659ca42e17e9e0a

Aliases

arxiv: 1307.4081 · arxiv_version: 1307.4081v1 · doi: 10.48550/arxiv.1307.4081 · pith_short_12: 37UVYAGE4OVR · pith_short_16: 37UVYAGE4OVREHT3 · pith_short_8: 37UVYAGE

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/37UVYAGE4OVREHT3TDTLYGLKW6 \
  | 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: dfe95c00c4e3ab121e7b98e6bc196ab79ab703b906475c93c659ca42e17e9e0a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "af6a3ef3efb9da71e58d6883f9b9caf492046ece882c12b5e0319dcbb2a33d2e",
    "cross_cats_sorted": [
      "astro-ph.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2013-07-15T20:00:01Z",
    "title_canon_sha256": "0f5f0c9be466305b67b2ca4ec2cef9de54fe8e1b3f487fd24b07757db4f9bfdb"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1307.4081",
    "kind": "arxiv",
    "version": 1
  }
}