Pith Number

pith:X73B3PC7

pith:2019:X73B3PC7UA5WQA4FPN7JB7GFHJ

not attested not anchored not stored refs pending

A Dramatic Decrease in Carbon Star Formation in M31

B. Aringer, B. F. Williams, D. R. Weisz, J. J. Dalcanton, K. A. G. Olsen, L. Girardi, M. L. Boyer, P. Guhathakurta, P. Marigo, P. Rosenfield, Y. Chen

arxiv:1904.02172 v2 · 2019-04-03 · 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{X73B3PC7UA5WQA4FPN7JB7GFHJ}

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	2026-05-17T23:40:32.771800Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

bff61dbc5fa03b6803857b7e90fcc53a7525836b5eaf557a9f3b561ef5f424d4

Aliases

arxiv: 1904.02172 · arxiv_version: 1904.02172v2 · doi: 10.48550/arxiv.1904.02172 · pith_short_12: X73B3PC7UA5W · pith_short_16: X73B3PC7UA5WQA4F · pith_short_8: X73B3PC7

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/X73B3PC7UA5WQA4FPN7JB7GFHJ \
  | 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: bff61dbc5fa03b6803857b7e90fcc53a7525836b5eaf557a9f3b561ef5f424d4

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d65ed2aba816ea80dc080e7e97696256731e6cfd881edfea52ad6158b4d89dfe",
    "cross_cats_sorted": [
      "astro-ph.GA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2019-04-03T18:00:08Z",
    "title_canon_sha256": "17015700f0a2af6abb516081b1b2035085092fce1e3152cc8634403b6719f648"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1904.02172",
    "kind": "arxiv",
    "version": 2
  }
}