Pith Number

pith:FFAGW2I4

pith:2021:FFAGW2I47PL5WJKTKJLBXXZOMH

not attested not anchored not stored refs pending

Discovery of allenyl acetylene, H2CCCHCCH, in TMC-1. A study of the isomers of C5H4

B. Tercero, C. Cabezas, F. Tercero, J. A. Lopez-Perez, J. Cernicharo, J. D. Gallego, J. R. Pardo, M. Agundez, N. Marcelino, P. de Vicente

arxiv:2103.01125 v1 · 2021-03-01 · 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{FFAGW2I47PL5WJKTKJLBXXZOMH}

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	2026-07-05T02:23:28.208705Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

29406b691cfbd7db255352561bdf2e61fa6babf34588ead3f07cf0299e7642fb

Aliases

arxiv: 2103.01125 · arxiv_version: 2103.01125v1 · doi: 10.48550/arxiv.2103.01125 · pith_short_12: FFAGW2I47PL5 · pith_short_16: FFAGW2I47PL5WJKT · pith_short_8: FFAGW2I4

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/FFAGW2I47PL5WJKTKJLBXXZOMH \
  | 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: 29406b691cfbd7db255352561bdf2e61fa6babf34588ead3f07cf0299e7642fb

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c0d7281ee8e3f1ecd24157ca5ab0783bf30b22379fc26eec51c9efb0b2072357",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2021-03-01T16:51:03Z",
    "title_canon_sha256": "99617bdc35ad81c605cafe3408f08463c8cd7d55620fcd19cb8e95928a59fd32"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2103.01125",
    "kind": "arxiv",
    "version": 1
  }
}